CE/Honda GXV160 Operator Manuals

OPERATOR MANUALIncludes Safety, Service and Replacement Part Information

300 Series Hole Diggers

Models:330H, 343H, 357H

Form: GOM12070702Version 1.2

Do not discard this manual. Before operation, read andcomprehend its contents. Keep it readily available for

reference during operation or when performing any service relatedfunction. When ordering replacement parts, please supply the

following information: model number, serial number and partnumber. For customer service assistance, telephone

800.533.0524, +507.451.5510. Our Customer Service Departmenttelefax number is 877.344.4375 (DIGGER 5), +507.451.5511.

There is no charge for customer service activities.

Internet address: http://www.generalequip.com.E-Mail: [email protected].

The products covered by this manual comply with the mandatoryrequirements of 98/37/EC.

Copyright 2009, General Equipment Company.

620 Alexander Drive SW • P.O. Box 334 • Owatonna, Minnesota 55060-0334 USATelephone: 800.533.0524 • International Telephone: +507.451.5510

Telefax: +507.451.5511 • Sales/Customer Service Department Toll Free: 877.344.4375 (DIGGER 5)http://www.generalequip.com • e-mail: [email protected]

Congratulations on your decision to purchase a General light construction product. From ourhumble beginnings in 1955, it has been a continuing objective of General Equipment Company tomanufacture equipment that delivers uncompromising value, service life and investment return.Because of this continuous commitment for excellence, many products bearing the General nameactually set the standards by which competitive products are judged.

When you purchased this product, you also gained access to a team of dedicated andknowledgeable support personnel that stand willing and ready to provide field supportassistance. Our team of sales representatives and in house factory personnel are available toensure that each General product delivers the intended performance, value and investment return.Our personnel can readily answer your concerns or questions regarding proper applications,service requirements and warranty related problems.

General Equipment Company places great emphasis upon not only product performance, but alsoon product safety. It is important to remember that this product will only be as safe as the operatorswhich utilize it. It just makes good, common sense to take the time to read and fully understand thecontents of this manual before attempting to utilize this product in service. If you ever do have anyquestions or concerns about this product, please feel free to contact our Customer ServiceDepartment at the telephone numbers listed below for assistance.

If there is anything that I can do to assist your efforts when utilizing this product, please do nothesitate to contact me. For assistance after normal business hours, telephone me at 507.451.9409or 507.363.1033. If I am not immediately available, I will attempt to return your call as soon aspossible.

Sincerely,

GENERAL EQUIPMENT COMPANY

Dennis Von RudenPresident

ENERAL EQUIPMENT COMPAPAP NY

ennis VoVoV n Ruden

Manufacturers of light construction equipment

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 3

DESCRIPTION PAGE

Notice to Operators 5

Operational Instructional Data Sheet 7

Safety Precautions 8PREPARATION. 8OPERATION. 10MAINTENANCE, REPAIR AND STORAGE. 11GENERAL SAFETY INFORMATION. 13

Assembly 15INSTALLING THE COMPOSITE MATERIAL OPERATOR HANDLES.NOTES TO THE THROTTLE CABLE INSTALLATION. 17

Before Starting the Engine 18FILLING THE ENGINE CRANKCASE WITH OIL.FILLING THE HOLE DIGGER TRANSMISSION WITH OIL.TRANSMISSION OIL RECOMMENDATIONS.FILLING THE ENGINE FUEL TANK.

Digging Operation 25OPERATIONAL DISCLAIMER.CALIFORNIA PROPOSITION 65 DISCLAIMER.SPARK ARRESTER DISCLAIMER.INFORMATION RELATIVE TO MINIMUM COMPONENT STANDARDS FOR THEOPERATION OF THE HOLE DIGGER.INFORMATION RELATIVE TO COMPOSITE MATERIAL OPERATOR HANDLES.GENERAL TRANSPORTATION INFORMATION.DETERMINATION OF POTENTIAL SUBSURFACE HAZARDS IN THE PROPOSED DIGGING LOCATION(S).SET UP FOR DIGGING.STARTING THE ENGINE WITH THE AUGER ATTACHED.OPERATING THE HOLE DIGGER.UNDERSTANDING KICKBACK.BACK CARE/PROPER LIFTING INFORMATION.MINIMIZING KICKBACK FROM AN OPERATIONAL STANDPOINT.MINIMIZING KICKBACK FROM A DESIGN STANDPOINT.OPERATING THE HOLE DIGGER CONTINUED.STOPPING THE HOLE DIGGER.TEMPORARY STORAGE FOR THE HOLE DIGGER WHILE ON THE JOB SITE.ADDING AND REMOVING NONFLIGHTED AND FULL FLIGHTED AUGER EXTENSIONS.

ServiceCHANGING THE HOLE DIGGER TRANSMISSION OIL. 35MAGURA THROTTLE CONTROL MAINTENANCE PROGRAM.AUGER MAINTENANCE PROGRAM.REPLACING A WORN AUGER SCREW BIT.REPLACING WORN AUGER TEETH.

Table of Contents

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 4ENGINE SERVICE.

Repair 40BASIC INFORMATION.TRANSMISSION OIL SEAL REMOVAL AND INSTALLATION.CENTRIFUGAL CLUTCH REMOVAL AND INSTALLATION.

Troubleshooting 47ENGINE.OPERATIONAL PROBLEMS.

Storage 47

Specifications 48

MSDS 49

Replacement Parts Diagrams 52


Notice to OperatorsIF YOU CAN NOT READ OR DO NOT FULLY UNDERSTAND THE CONTENTS OFTHIS MANUAL, PLEASE CONTACT THE FACTORY FOR PROPER ASSISTANCEBEFORE ATTEMPTING TO OPERATE THIS PRODUCT.

SI TU NO PUEDES LE’ER O NO COMPRENDES EL CONTENIDO DE ESTE MANUALFAVOR DE PONERSE EN CONTACTO CON LA. FABRICA PARA ASSISTENCIA- APROPIA ANTES DE INTENTAR PARA OPERAR ESTE PRODUCTO.

SOLLTEN SIE DIESE GEBRAUCHSANWEISUNG NICHT LESEN KOENNEN ODERES NICHT VOLLKOMMEN VERSTEHEN, WENDEN SIE SICH BITTE AN DENHERSTELLER FUER RICHTIGE HILFE EHE SIE VERSUCHEN DIESES PRODUKTZU OPERIEREN.

SI VOUS NE LISEZ OU NE COMPRENDRE ENTIEREMENT LES MATIERES DE CEMANUEL, S’IL VOUS PLAIT, CONTACTEZ L’USINE POUR L’ASSISTANCEAPPROPRIEE AVANT D’UTILISER LE PRODUIT.

DANGER indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

WARNING indicates a hazard with a medium level of risk which, if not avoided, could result in death orserious injury.

CAUTION indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury.

These safety alert symbols identify important safety messages in this manual. When you see these symbols, bealert to the possibility of personal injury and carefully read the message that follows.

Do not allow anyone to operate the Hole Digger without first reading this Operator Manual and becoming familiarwith its operation. The manufacturer of this Hole Digger has gone to great extremes to provide the owner(s) and/oroperator(s) with the finest equipment available for its intended job function of digging vertical holes inunconsolidated and specific semiconsolidated earth formations. Yet, the possibility exists that the Hole Digger canbe utilized in and/or subjected to job applications not perceived and/or anticipated by the manufacturer. Suchmisuse and/or misapplication of the Hole Digger can lead to the possibility of serious damage, injury or even death.It is the responsibility of the owner(s) and/or operator(s) to determine that the Hole Digger is being utilized and/oroperated within the scope of its intended job function. It is the responsibility of the owner(s) and/or operator(s) toestablish, monitor and constantly upgrade all safety programs and/or practices utilized in and for the operation ofthe Hole Digger. The purpose of such programs is to provide for owner(s') and/or operator(s') safety. Operatorsmust be instructed to recognize and avoid unsafe conditions associated with their work (29 CFR 1926.21 (b)(2))and/or applicable updated revisions. It is the responsibility of the owner(s) and/or operator(s) to determine that nomodifications and/or alterations have been made to the Hole Digger. Modifications and/or alterations can lead tothe possibility of serious damage, injury or even death. It is the responsibility of the owner(s) and/or operator(s) tomake this Operator Manual available for consultation during all phases of operation. Refer to OSHA 2207 and/orapplicable updated revisions which contains all OSHA job safety and health rules and regulations (1926 and 1910)covering construction.


The concept of portable, one and two man, hole digging equipment has been successfully utilized for manyyears as a practical solution to many types of hole digging job requirements. The basic concept is provenand well accepted within the associated marketplaces. Use of a Hole Digger requires strenuous workactivity. This type of work activity can be considered to be greater in magnitude than that experiencedwith the use of many other types of both light construction and lawn and garden related equipment. Thistype of work activity should only be attempted by operators of adequate physical size and stature, mentalawareness and physical strength and condition. The body parts most noticeably affected during the holedigging process are the arms, hands, wrists, shoulders, lower back and legs. The process can alsoproduce excessive stress/strain directly to the back muscles, spinal vertebrae and many other body parts.Back and wrist related pain can be side effects of utilizing a Hole Digger. A potential operator with a chronicback related problem or a history of back and/or other medically related problems should not attempt toutilize the Hole Digger. Use of the Hole Digger may only aggravate this and any other medically relatedproblem. Because of the diverse type of prevailing job applications, job site conditions, operatorexperience levels and operator physical characteristics, no warranty, guarantee, representation and/orliability is made by the manufacturer as to the absolute correctness or sufficiency of any operationalprocedure, operational position and/or technique. There is no absolute guarantee that an operator of anygiven experience level, physical size and/or physical condition will be immune to the possibility of and/orprobable physical side effects of the normal use of the Hole Digger. Each potential operator must be madeaware of and assume the operational and physical liability described and/or associated with the use of theHole Digger. Improper use of the Hole Digger can result in property damage and/or personal injury,including death. Each potential operator not willing to assume the operational and physical liabilitydescribed and/or associated with the use of the Hole Digger, should not operate it. Proper levels ofoperator experience, skill and common sense are essential for maximizing the safe and efficient operationof the Hole Digger

Record the Hole Digger and engine/electric motor serial numbers in the spaces provided below.

_______________ Model Number

_______________ Serial Number

_______________ Engine/Electric Motor Serial Number

_______________ Date of Purchase

Specifications and design are subject to change without notice or obligation. All specifications are generalin nature and are not intended for specific application purposes. General Equipment Company reservesthe right to make changes in design, engineering or specifications and to add improvements or discontinuemanufacture at any time without notice or obligation. General Equipment Company and its agents accept noresponsibility for variations which may be evident in actual products, specifications, pictures anddescriptions contained in this publication


Operator Instructional Data SheetThe following undersigned operators of the Hole Digger described and/or pertaining to this Operator Manual havereceived formal safety and operational information/instruction from the undersigned owner(s)/instructor(s) inaccordance to OSHA 29 CFR 1926.21 (b)(2) and/or applicable updated revisions pertaining to, but notnecessarily limited to the:

1) READING, COMPREHENSION AND ACKNOWLEDGEMENT OF THE MATERIAL COMPRISING THEENTIRE CONTENTS OF THE APPLICABLE OPERATOR MANUAL AND APPLICABLE SAFETY ANDOPERATIONAL INFORMATION VIDEO TAPE FOR THE HOLE DIGGER.

2) FORMALIZED OPERATOR SAFETY PROGRAM TO BE DEVISED BY THE OWNER OF THE HOLEDIGGER IN CONJUNCTION WITH THE CONTENTS OF THE APPLICABLE OPERATOR MANUAL AND THESAFETY AND APPLICABLE OPERATIONAL INFORMATION VIDEO TAPE FOR THE HOLE DIGGER.

3) OSHA RULES AND REGULATIONS RESEARCHED FOR AND/OR BY THE OWNER OF THE HOLEDIGGER AND DEEMED APPLICABLE TO THE SAFE AND PROPER USE AND/OR OPERATION OF THE HOLEDIGGER FOR ANY SPECIFIC JOB APPLICATION.

4) LOCAL LAWS, REGULATIONS AND CUSTOMS RESEARCHED FOR AND/OR BY THE OWNER OF THEHOLE DIGGER AND DEEMED APPLICABLE TO THE SAFE AND PROPER USE AND/OR OPERATION OF THEHOLE DIGGER FOR ANY SPECIFIC JOB APPLICATION.

5) FORMALIZED MAINTENANCE PROGRAM FOR THE HOLE DIGGER TO BE DEVISED BY THE OWNER OFTHE HOLE DIGGER IN ACCORDANCE WITH, BUT NOT NECESSARILY LIMITED TO, THESPECIFICATIONS, GUIDELINES AND OPERATIONAL INFORMATION CONTAINED IN THE APPLICABLEOPERATOR MANUAL.

6) COMPREHENSIVE OPERATIONAL INSTRUCTIONS FOR THE CORRECT AND PROPER USE OF THEHOLE DIGGER AS PER THE CONTENTS OF THE APPLICABLE OPERATOR MANUAL AND THEAPPLICABLE SAFETY AND OPERATIONAL INFORMATION VIDEO TAPE.

_______________ Operator _______________ Owner/Instructor __________ Date






NOTE: INSERT COPIES OF THIS PAGE WITHIN THE OPERATOR’S MANUAL IF SPACE FORADDITIONAL OPERATORS IS REQUIRED.


Safety Precautions

THE FOLLOWING SAFETY PRECAUTIONSPROVIDE SOME COMMON SENSE GUIDES TOPROMOTE SAFETY AND EFFICIENCY WITH THE300 SERIES HOLE DIGGERS. NO WARRANTY,GUARANTEE OR REPRESENTATION IS MADE BYTHE MANUFACTURER AS TO THE ABSOLUTECORRECTNESS OR SUFFICIENCY OF ANYINFORMATION OR STATEMENT. THESE SAFETYPRECAUTIONS ARE INTENDED TO DEALPRINCIPALLY WITH COMMON PRACTICES ANDCONDITIONS ENCOUNTERED IN THE USE OF THEHOLE DIGGER AND ARE NOT INTENDED TO BEALL INCLUSIVE. PROPER LEVELS OF OPERATOREXPERIENCE, SKILL AND COMMON SENSE AREESSENTIAL FOR SAFE AND EFFICIENTOPERATION.

THE ENGINE EXHAUST FROM THIS PRODUCTCONTAINS CHEMICALS KNOWN TO THE STATE OFCALIFORNIA TO CAUSE CANCER, BIRTHDEFECTS OR OTHER REPRODUCTIVE HARM. THISSTATEMENT IS MADE IN COMPLIANCE TOCALIFORNIA PROPOSITION 65.

INCORRECT USE OF THE HOLE DIGGER CANRESULT IN PROPERTY DAMAGE, PERSONALINJURY OR EVEN DEATH. TO REDUCE THISPOSSIBILITY, GIVE COMPLETE AND UNDIVIDEDATTENTION TO THE JOB AT HAND AND FOLLOWTHESE SAFETY PRECAUTIONS:

PREPARATION.

1) The 300 Series Hole Diggers are a specialized typeof powered equipment, designed for a specific jobfunction and requires adequate and thoroughinstruction BEFORE it is operated. The size, power,complexity and operating characteristics of this type ofpowered equipment would dictate that each operatormust receive adequate, professional instructionregarding the proper operation of this Hole Diggerbefore being allowed to utilize it. BEFORE attempting toutilize this Hole Digger, read this Operator's Manual, theapplicable Safety and Operational Information Video

Tape and the material supplied by the enginemanufacturer to familiarize each operator with itscorrect operating procedures. Avoid the urge not to takethe necessary time to read this Operator's Manualbefore operating the Hole Digger. DO NOT OPERATETHE HOLE DIGGER UNTIL EACH OPERATORCOMPLETELY COMPREHENDS THE CONTENTS OFTHIS MANUAL, THE APPLICABLE SAFETY ANDOPERATIONAL INFORMATION VIDEO TAPE,APPLICABLE SUPPLEMENTAL INFORMATION ANDTHE INFORMATION SUPPLIED BY THE ENGINEMANUFACTURER.

2) Develop a comprehensive program for the safeoperation of the Hole Digger by its owner(s) and/oroperator(s). Such a program will include, but is notlimited to: instructional requirements for operation,applicable OSHA requirements, local laws andregulations, job site safety and a Hole Diggermaintenance program. Constantly examine andupgrade this program to guarantee owner(s) and/oroperator(s) safety. Each operator must be fullyinstructed regarding the specifics of this safetyprogram.

3) Determine that the Hole Digger is in its original,factory configuration and has not been modified in anymanner. Many modifications can result in potentiallydangerous configurations that can lead to propertydamage and/or personal injury. If there are anyquestions about possible modifications made to theHole Digger, contact the Customer Service Departmentfor specific information BEFORE utilization. There is nocharge for this service.

4) Minors should never be allowed to operate the HoleDigger. Bystanders, especially children and animals,should not be allowed in the area where the HoleDigger is in use. The hole digging process can result inflying particles being emitted at high velocity andstriking the operator and/or onlookers. This can lead tothe possibility of property damage and/or personalinjury. Keep all body parts, loose clothing, foreignobjects and onlookers clear of the rotating auger and/orauger extensions.

5) Operators must be in proper physical condition,mental health and not under the influence of anysubstance (drugs, alcohol, etc.) which might impairvision, dexterity or judgment. Working with the HoleDigger is strenuous. If you have any condition thatmight be aggravated by strenuous work, check withyour doctor BEFORE operating the Hole Digger. Guardagainst the possibility of back related injuries. Always liftthe Hole Digger with leg muscles and not with the back.Operators must be of adequate height so that for anygiven operating configuration, the operator handle(s)

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 9remain below their shoulder sockets. Do not operatethe Hole Digger if this condition is not satisfied. The300 Series Hole Diggers require that both operators beof similar height, weight and strength to maximizedigging efficiency and minimize the possibility ofpersonal injury. Both operators share the burdenassociated with the hole digging process.6) Prolonged use of the Hole Digger (or other, similarmachines) exposes the operator to vibrations whichmay produce Whitefinger Disease (Raynaud'sPhenomenon). This phenomenon reduces the hand'sability to feel and regulate temperature, producesnumbness and burning sensations and may causenerve and circulation damage and tissue necrosis.Antivibration systems do not guarantee that you will notsustain Whitefinger Disease. Therefore, continuousand regular users should closely monitor the conditionof their hands and fingers. After each period of use,exercise to restore normal blood circulation. If any ofthe symptoms appear, seek medical adviceimmediately.

7) Clothing must be sturdy and snug fitting, but allowcomplete freedom of movement. Never wear loosefitting jackets, scarves, neckties, jewelry, flared orcuffed pants or anything that could become caught oncontrols or moving parts. Wear long pants to protectyour legs. Protect your hands with heavy duty, nonslipgloves to improve your grip. Good footing is mostimportant when operating the Hole Digger. Wear sturdyboots with nonslip soles. Steel-toed safety shoes arehighly recommended. Keep shoes properly laced.Never wear tennis shoes or other, similar type shoeswhich afford little or no protection. Wear an approvedsafety hard hat to protect the operator'(s') head(s)where there is a danger of head injuries.

8) Noise, generated by the engine of the Hole Diggerand the actual process itself, can damage yourhearing. The 300 Series Hole Digger operates with anoise emission greater than 70dBA. Hearing protectionis required while operating or when near operatingequipment. Continuous and regular operators shouldhave their hearing checked regularly.

9) Flying debris, generated by the hole diggingprocess, can cause eye injury. Eye protection isrequired while operating or when near operatingequipment.

10) Visually inspect the Hole Digger, auger(s), augerextension(s), and accessories for damaged or wornparts. Inspect each auger for the proper screw bit andteeth. Look for loose and/or damaged handle grips.Check for loose and/or broken parts. Determine thatoperator controls work freely, all safety devices are

operative and information/safety decals are readable.Check to determine that the Hole Digger and all relatedaccessories are in good mechanical conditionBEFORE utilization.

11) Contact appropriate representatives to determineif/where electrical cables, gas lines and otherhazardous items are buried under the work surfaceBEFORE utilization. Some Hole Diggers featureoperator handles constructed of a non metallic,composite material. Use of this material does notguarantee the operators will be properly insulated fromcontact with charged electrical cables. The Hole Diggerand related accessories are not classified as beinginsulated. Contact with buried electrical cables, gaslines and other hazardous items can result inelectrocution and/or an explosion.

12) Know how the controls operate. Know how to stopthe engine quickly in an emergency. Always start theengine according to the instructions as outlined in thismanual to minimize the possibility of unexpected oruncontrolled auger rotation. Unexpected auger rotationcan cause loss of machine control, and the possibilityof property damage and/or personal injury.

13) Never exceed the recommended capacities of theHole Digger. Refer to the Specifications section of thismanual for more detailed information. Always utilize thecorrect auger and auger extension series designed foruse with the Hole Digger. Some Hole Diggers canutilize specially designed augers intended for drillingholes through ice. Such an auger will find limitedsuccess when utilized to dig earth. Use of an incorrectauger or auger series can result in property damageand/or personal injury.

14) Do not operate the Hole Digger on a jobsitelocation where kickback forces generated during thehole digging process can allow body parts to come indirect contact with a vertical wall, foundation or othersupport type structures in close proximity. Such anoccurrence can result in properly damage and/orpersonal injury. Always maintain a safe and reasonabledistance from these types of structures.

15) Breathing Carbon Monoxide fumes while operatingthe Hole Digger can result in property damage and/orpersonal injury. The normal operation of the HoleDigger is outdoors where the potential effects ofCarbon Monoxide to the operators are minimized. If theHole Digger is operated in a closed area (indoors oroutdoors), determine if supplemental ventilation isrequired to minimize the potential effects of CarbonMonoxide to the operators. Follow all current OSHAregulations pertaining to ventilation.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 10OPERATION.

1) Give complete and undivided attention to the job athand. Do not chew gum, smoke and/or use smokelesstobacco while utilizing the Hole Digger. Do not attemptto eat and/or drink while utilizing the Hole Digger.Determine that eyeglasses, hearing aid devices andother medical related devices are properly secured.Keep shoes properly laced. Use of the Hole Digger isstrenuous and causes fatigue. Help prevent the causeof an accident. Plan to take work breaks as required tohelp maintain proper mental and physical alertness.

2) The 300 Series Hole Diggers are not sealed orinsulated. Do not operate any Hole Digger in anexplosive atmosphere or near combustible materials.Refer to current OSHA rules and regulations.

3) Gasoline is an extremely flammable fuel. Useextreme caution when handling gasoline or mixingfuel. Always utilize UL®, CSA® OR CE approvedcontainers for the storage and transportation of fuel.Do not smoke or bring fire or flame near the fuel.Always shut off the engine and allow it to cool beforerefueling. Never remove the fuel tank filler cap whilethe engine is running. Never operate an enginewithout a fuel tank filler cap. Select bare ground forfueling and move at least 10 feet from the fueling spotbefore starting the engine. Wipe off any spilled fuelbefore starting the engine and check for leakage. If afuel or oil leak is found, do not start or run the engineuntil the leak is fixed and the spillage has been wipedaway. Take care not to get fuel or oil on your clothing.If this happens, change your clothing immediately.Before operating the Hole Digger refer to theSpecifications section of this manual for moredetailed information regarding fuel and lubricationrequirements.

4) The 300 Series Hole Diggers are designed for use bytwo operators. Use of the Hole Digger by one or morethan two operators can lead to confusion and loss ofcontrol, resulting in property damage and/or personalinjury. Never operate the Hole Digger with an impropernumber of operators. Such a configuration can result inproperty damage and/or personal injury. If it is felt thatmore than two persons are required to furnishadditional "down pressure" to the auger, STOP andcontact the Customer Service Department for specificoperational and service/maintenance information.There is no charge for this service.

5) Do not operate the Hole Digger with onlookers closeby. Caution all onlookers to stand clear. The holedigging process can result in flying particles being

emitted at high velocity and striking the operator and/oronlookers. This can lead to the possibility of propertydamage and/or personal injury. Wear proper safetyeyewear. Keep all body parts, loose clothing andforeign objects clear of the rotating auger.

6) Do not utilize a shovel and/or foreign object toremove loose soil from around the hole area while theHole Digger is in use. Such a practice can result in theshovel and/or foreign object to become entrapped bythe rotating auger, leading to property damage and/orpersonal injury.

7) Start the engine according to the instructions asoutlined in this manual to minimize the possibility ofunexpected auger rotation. Unexpected auger rotationcan result in the loss of machine control and thepossibility of property damage and/or personal injury.8) Start and operate the Hole Digger only in a wellventilated area. Carbon Monoxide fumes given off byan engine are poisonous. Breathing these fumes canresult in property damage and/or personal injury.Operate the Hole Digger only when/where visibility andlight are adequate for the job at hand. Work carefully.Always hold the operator handles firmly with bothhands. Wrap your fingers around the handles, keepingthem cradled between your thumbs and fingers. Alwaysdetermine the operator handles are in good conditionand free of moisture, pitch, oil or grease. Wear glovesto improve your grip. Never leave the Hole Diggerrunning unattended.

9) Stop the engine between each hole. Allowing theengine to remain operating between each holesubstantially increases the potential for propertydamage and/or personal injury. Special care must beexercised on slippery conditions and on difficult,uneven surfaces. Watch for cracks, high spots andother surface irregularities. Keep proper footing andbalance at all times. The normal use of this machine ison level surfaces. Other terrains can be dangerous andshould be avoided. Only properly trained operatorsshould attempt these techniques.

10) The 300 Series Hole Diggers are designed to bestarted by both operators in the following manner: theCrew Chief regulates engine speed (RPM) with theengine throttle control while the Crew Member startsthe engine by use of the recoil starter. The Crew Chiefis responsible for the necessary verbal commands.Never operate a 300 Series Hole Digger if it requiresone of the operators to operate the engine throttlecontrol, carburetor choke system and the engine recoilstarter (or any combination) at the same time. This isnot a factory designed operating configuration for theHole Digger. Such configuration(s) will result in loss ofmachine control, property damage and personal injury.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 11Contact the Customer Service Department forinformation relative to restoring the Hole Digger to itsoriginal configuration BEFORE further utilization. Thereis no charge for this service.

11) Contact with a hot, engine muffler can causeproperty damage and/or personal injury. Remain clearof a hot engine muffler. Do not over speed the engineby altering the governor setting or by disconnecting theengine governor. Serious damage to the engine and/orpersonal injury can result.

12) The 300 Series Hole Digger are powered bygasoline engines which produce Carbon Monoxidefumes during the combustion process. CarbonMonoxide fumes are poisonous. Breathing CarbonMonoxide fumes while operating the Hole Digger canresult in property damage and/or personal injury. thenormal operation of the Hole Digger is outdoors wherethe potential effects of Carbon Monoxide to theoperators are minimized. If the Hole Digger is operatedin a closed area (indoors or outdoors), determine ifsupplemental ventilation is required to minimize thepotential effects of Carbon Monoxide to the operators.Follow all current OSHA regulations pertaining toventilation.

13) Because this Hole Digger is classified as a lowcost, hand held, low horsepower, portable typemachine, it is limited in the number of practical and/orsuitable job applications. A particular job site, actualsurface conditions, job specifications and operatorskill/common sense may dictate that a different type ofmachine (with characteristics of higher purchase cost,being mounted to a carrier vehicle, with greaterhorsepower and less mobility), method and/or processbe utilized to properly complete the job with the degreeof efficiency and safety required. Contact the CustomerService Department for specific information regardingsuitable job applications, job site surface conditionsand operator experience/skill/common senserecommendations for the Hole Digger BEFOREutilization. There is no charge for this service.

MAINTENANCE, REPAIR AND STORAGE.

1) Use only genuine, approved replacement parts andaccessories for maintenance and repair. Use of partsand accessories manufactured by others can result inproperty damage and/or personal injury.

2) Follow the Service instructions as outlined in theappropriate section of this manual.

3) Always stop the engine and disconnect the sparkplug wire BEFORE checking or working on the HoleDigger.

4) Always properly maintain the Hole Digger.Frequently check all fasteners and individual parts.Built in safety features are effective only if they aremaintained in good working condition. Replace anyquestionable part or assembly with a genuine, factoryapproved, replacement part. Do not forsake propermaintenance for the price of a few replacement parts.Proper maintenance does not cost...it actually paysdividends. Do not attempt any maintenance repair worknot described in this manual. Have such workperformed at your dealer's service facility.

5) Determine the engine throttle control and throttlecable assemblies are not damaged and allow forcomplete freedom of movement. This is necessary toallow them to perform their intended job functions. Donot operate the Hole Digger with a damaged enginethrottle control and/or throttle cable assembly.

6) A worn or damaged engine muffler is a fire hazardand may cause loss of hearing. Check to see that themuffler is in good condition. If the muffler is equippedwith a spark arresting device, determine that it is inproper working condition at regular service intervals.Replace the spark arresting device with an approvedreplacement if there is any question of its integrity. It isthe responsibility of the owner(s) and/or operator(s) toprovide for and properly maintain a USDA approved,spark arresting muffler in an operating area specifiedby law. Check with appropriate governing agencies formore specific information. The Hole Digger must not beoperated if the muffler is faulty or has been removed.Contact with a hot engine muffler can cause propertydamage and/or personal injury.

7) Maintain all safety and operation decals in propercondition. If any decal becomes damaged and/orunreadable, replace with a genuine, factory approved,replacement part only.

8) The Hole Digger may utilize self locking typehexagon head nuts to minimize the effects of vibration.Replace all self locking hardware with genuine, factoryapproved, replacement parts only.

9) Consult the material supplied by the enginemanufacturer for specific information relative to properoperational, lubrication and storage requirements.

10) Replace the auger teeth and screw bit when signsof excessive wear are seen. When such componentsare not replaced at proper intervals, excessive wear willoccur at the boring head and auger flighting. The endresult is an inverted cone configuration for the augerwhich usually requires complete replacement. FIGURE1. Digging with augers that are past their useful service

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 12life or that have not been properly maintained canresult in substandard productivity, excessive propertydamage and/or personal injury. Auger service life canbe greatly extended with a consistent augermaintenance program.

11) At the conclusion of the useful service life of theHole Digger, drain and properly dispose of all fluids perlocal requirements. Disassemble engine andtransmission components. Wear appropriate safetyapparel during the disassembly process. Recyclealuminum, steel and nonmetallic components properlyper local requirements.

FIGURE 1


General Safety InformationPhysical ExertionOperating the Hole Digger requires proper physical stamina and mentalalertness.Improper operation can result in physical injury and/or damage to themachine.Operators must be alert and of proper physical size and condition.

NoiseThe Hole Digger operates with a noise emission level grater then 70dba.Exposure to high noise emission levels can result in hearing loss or damage.Wear hearing protection when near or operating the Hole Digger.

Flying DebrisThe hole digging process can result in flying debris. Contact with flying debris can result in personal injury.Wear eye protection and appropriate safety apparel when near or operatingthe Hole Digger.

Burn DangerAn engine muffler can become hot. A hot muffler can result in personal injury.Do not touch a hot engine muffler.

KickbackAuger contact with a buried rock or other obstruction can thrust the handletoward the operator with a sharp, counter-clockwise rotation called kickback.Kickback forces can inflict damage to hands, arms and other upper body parts.Assume the proper operating position when digging to maximize control andminimize the effects of kickback

Body StrainThe hole digging process can result in body strain.Strain can inflict damage to lower back and upper body parts. Minimize the effects of strain by lifting the Hole Digger with your backpositioned vertically.

Auger EntrapmentThe earth auger is not shielded.Body contact with a rotating earth auger can result in personal injury. Do not come in contact with a rotating earth auger.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 14Safety Practices:

Operation is strenuous work. Operatorsmust be in proper physical condition,mental health and not under theinfluence of any substance which mightimpair vision, dexterity or judgment.Check with your doctor BEFOREoperation.

Clothing must be sturdy and snugfitting, but allow complete freedom ofmovement. Wear sturdy, leather bootswith nonslip soles; heavy duty, nonslipgloves and hearing/eye protection. Weara safety hard hat as required.

Always assume the digging locationcontains buried undergroundobstructions. Contact appropriaterepresentatives to determine if/whereelectrical cables, gas lines and otherhazardous objects are buried BEFOREoperation.

Know how controls operate. Know howto stop theengine inan emergency.

Always operate the Hole Digger withthe correct number of operators.

Start and operate the Hole Digger onlyin a well ventilated area. CarbonMonoxide fumes from the engine arepoisonous.

Do not operate with onlookers close by.Caution all onlookers to stand clear.

Keep all foreign objects clear of therotating auger.

Never attempt to “ream out” an existing,smaller hole with a larger diameter auger.

To minimize the effects of kickback,operate the Hole Digger while assumingthe proper operator position. Operateonly when/where visibility and light areadequate for the job at hand.

Stop the engine between each hole tominimize the possibility of propertydamage and/or personal injury. Normaloperation is on level surfaces.

Contact with a hot engine muffler andheat shield can cause property damageand/or personal injury. Remain clear ofhot engine muffler and heat shield.

Proper OperatorPosition

Improper OperatorPositions

Assume the digginglocation is filled withburied obstructions.

Crew Chief operatesengine throttle controlwith right hand. Crewmember operateschoke control andstarts engine.

Grasp operatorhandles firmly.

Position left footforward of right footat a comfortabledistance apart.

Keep left sidehandles as close towaist/leg/arms areasas possible tomaximize leverageand control.

Keep arms as closeto upper body aspossible to minimizestress.

Keep back asvertical as possiblewhile digging tominimize stress.

Bend legs asneeded while diggingto minimize stress.

Improper leg positions.Handles too far from upper body.Arms too far from upper body.

Operators leaning too far over machine.Operator positions will not allow for properreaction and control in the event ofkickback.


AssemblyOpen the shipping carton immediately upon receipt.Visually inspect the contents of the carton for freightdamage and/or missing parts. If shipping damage isevident, contact the delivering carrier immediately toarrange for an inspection of the damage by their claimsrepresentative. Federal law requires that a claim befiled within a specified time period. If missing parts aredetected, notify your dealer or contact the CustomerService Department for assistance in obtaining them.

Included in the shipment for all models of Hole Diggersshould be the following:

1 each, engine/transmission assembly3 each, straight operator handles with handle grips1 each, straight operator handle with throttle control

assembly1 each, bag of assorted hardware1 each, Operator Manual1 each, Safety and Operational Information DVD1 each, applicable engine manual1 each, warranty initiation card1 each, Final Inspection Form

INSTALLING THE COMPOSITE MATERIALOPERATOR HANDLES.

Application: 330H, 343H and 357H HoleDiggers powered by the Honda GXV160engine.

Tools Required:

2 each, 1/2 inch wrenches1 each, 5/16 inch wrench1 each, torque wrench, 240 inch pounds capacity with

1/2 inch socket1 each, small flat bladed screw driver1 each, small Phillips screwdriver1 each, small vice grip pliers1 each, cut off pliers

The assembly of the operator handles to thetransmission will require a level working platform ofsufficient size and appropriate height. As an alternative,the transmission shaft assembly can be securelymounted in a suitable bench vice.

1) Open the bag of assorted hardware into a suitablecontainer in order to minimize the possibility of losingany part.

2) Assemble the steel handle reinforcements over thehandles and align the holes so that the retaining

capscrews can be readily inserted. The reinforcementwith the welded throttle cable guide is assembled to thethrottle control handle. FIGURE 2.

FIGURE 2

3) Facing the spark plug end of the engine, installtwo straight operator handles into thetransmission case sockets with the supplied capscrews facing upwards. FINGER TIGHTEN ONLY.DO NOT FINAL TORQUE THE FASTENERS ATTHIS TIME. FIGURE 3.

FIGURE 3

4) Facing the fuel tank end of the engine, install theremaining straight operator handle into thetransmission case socket located under the enginegovernor control as per Step 3. FINGER TIGHTENONLY. Install the operator handle with the throttlecontrol assembly in the remaining transmission casesocket with the plastic nameplate facing upwards. TheHole Digger is designed for the Magura® twist gripthrottle control to be operated by the right hand. All

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 16operating instructions in this Operator's Manual aredirected with the Magura throttle control to beassembled and operated in the configuration asoutlined in the Assembly section. Do not deviate theassembly and operation of the Magura® throttle controlfrom that outlined in the Operator's Manual. FIGURE 4.

FIGURE 4

IMPROPER ASSEMBLY AND OPERATION OFTHE MAGURA® THROTTLE CONTROL WILLREDUCE THE CONTROLLABILITY OF THEHOLE DIGGER, RESULTING IN PROPERTYDAMAGE AND/OR PERSONAL INJURY.

5) Using the torque wrench, torque all handlecapscrews evenly to 240 inch pounds (27 N.m.).

Excessive fastener torque values can lead tosubsurface fractures in the material and topremature failure of the handle. Frequentlycheck the handle attach areas for signs ofcracking and fatigue. Replace any operatorhandle of questionable structural qualitieswith a factory replacement part only.

6) Route the throttle cable assembly into the guidelocated on the handle reinforcement and into thethrottle cable attach bracket located on the engineblock under the air cleaner. The attach bracket has twolocations through which to route the cable. Route thecable through the lower location. The attach bracketshould be in full contact with the aluminum end of thethrottle cable. Use the Phillips screw driver totemporary secure. FIGURE 5.

FIGURE 5

7) Loosen the Phillips head screw on the throttle armswivel. Route the inner wire into the hole of the swivelassembly. FIGURE 6.

FIGURE 6

8) Secure the throttle cable to the transmission capscrew under the fuel tank with the supplied clamp. Donot allow the clamp to crush the throttle cable.FIGURE 7.


FIGURE 7

9) Using the vice grip type pliers, remove any excessinner wire slack and tighten the swivel assembly screwusing the flat bladed screwdriver and 5/16 inch wrench.The pulling movement with the vice grip type pliersmust not rotate the Magura® throttle control. Thethrottle arm return spring is designed to rapidly returnthe engine to idle speed/ignition cut off when thethrottle control is released. If this is not occurring, checkthe throttle control assembly for possible causes ofbinding and movement restrictions. Adjust the swivelassembly as necessary to allow for complete freedomof movement. FIGURE 8.

FIGURE 8

FOR OPERATIONAL SAFETY ANDPRODUCTIVITY CONSIDERATIONS, IT ISEXTREMELY IMPORTANT THAT INNER WIRESLACK BE COMPLETELY REMOVED FROMTHE THROTTLE CONTROL SYSTEM. INNERWIRE SLACK CAN REDUCE OVERALLOPERATOR CONTROL, RESULTING INPROPERTY DAMAGE AND/OR PERSONALINJURY.

10) Rotate the throttle control counterclockwise (themaximum speed position) to determine that the innerwire pulls the throttle lever of the carburetor forward,against its stop. Improper adjustment will not allow theengine to operate at its maximum, no load, governedspeed and affect the overall digging performance of theHole Digger. Adjust the swivel assembly and throttlecable attach bracket as necessary to allow for completefreedom of movement.

Check for possible throttle cable inner wire binding andmovement restrictions caused by the clip and clamp.Rework and adjust as necessary to allow for completefreedom of movement.

11) Using the cut off pliers, cut the remaining inner wirebehind the swivel assembly, leaving approximately oneinch (25.4 mm) of excess wire.

12) Check all fasteners for security. Consult a fastenertorque chart for proper torque value if any fastener isfound to require retorquing.

NOTES TO THE THROTTLE CABLEINSTALLATION.

Application: 330H, 343H and 357H Hole Diggerspowered by the Honda GXV160 engine.

1) The Honda GXV160 engine incorporates amultipurposed carburetor/throttle arm design thatallows it to be utilized with both Bowden (push) andbraided wire (pull) type configurations. For simplicity,productivity and service reasons, the Hole Diggerincorporates a braided wire (pull) type configuration. AMagura® twist grip throttle control is utilized as theengine speed control device. The Magura® throttlecontrol has proven to be a rugged, dependable devicethat delivers exceptional service while requiring onlyminimal service.

2) The GXV160 engine utilizes one or two springloaded screws as stops for the carburetor throttle arm.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 18a) If equipped, the shorter (inner) screw is nonfunctional for this application.

b) The longer (outer) screw is factory set to prevent theengine from operating in an overspeed configuration.As set at the factory, the GXV160 engine will operate atapproximately 3800/3900 RPM no load. In a no loadconfiguration the engine is operating at maximumgoverned speed without an earth auger attached to thetransmission driveshaft.

Do not alter the position of the spring loadedscrew that regulates maximum engine speed.An improper setting can result in excessiveengine speed leading to damage, substandarddigging performance and loss of operatorcontrol that can result in property damageand/or personal injury.

Before Starting the EngineFILLING THE ENGINE CRANKCASE WITH OIL.


Tools Required:

1 each, small, adjustable wrench (if needed)1 each, small, clean funnel with a flexible extension

spout

Filling the engine crankcase with oil will require a levelworking platform of sufficient size and appropriateheight. As an alternative, the transmission driveshaftcan be securely in a suitable bench vise.

1) Wipe any dust or dirt from the crankcasedipstick/filler plug area. Remove the dipstick/filler plug.

2) Using the funnel, add oil to the engine crankcase.For proper classifications and/or amount, consult thematerial supplied by the engine manufacturer forspecific information.

3) Relace the dipstick/filler plug and tighten. Wipe offany excess spilled oil. Properly dispose of the spilledoil.

4) Consult the material supplied by the enginemanufacturer for other service related informationincluding oil change interval.

DO NOT OPERATE THE HOLE DIGGERUNLESS PROPER OIL LEVEL IS MAINTAINED.IMPROPER OIL LEVEL CAN RESULT INPROPERTY DAMAGE AND/OR PERSONALINJURY. CONSULT THE MATERIAL SUPPLIEDBY THE SPECIFIC ENGINE MANUFACTURERFOR INFORMATION RELATIVE TO PROPERMAINTENANCE PROCEDURES.

FILLING THE HOLE DIGGER TRANSMISSIONWITH OIL.

Application: All 300 Series models.

Tools Required: 1 each, small adjustable wrench.1 each, small, clean funnel with a flexible

extension spout.

Filling the transmission with oil will require a levelworking platform of sufficient size and appropriateheight. An alternative, the transmission driveshaft canbe securely mounted in a suitable bench vise.

1) Wipe any dust or dirt from the transmission oilfiller/level plug area. The oil filler/level plug is located onthe side of the transmission. Remove the plug with theadjustable wrench.

2) Using the funnel, pour 1 US quart (0.94 liter) ofGeneral Equipment Company transmission and EngineOil, PN 999-11, or a high grade, SAE 30 Detergent or10W30 motor oil into the transmission though the oilfiller/level plug opening. Use only an oil marked with anengine service classification SF, SG, or SH/CD. As ageneral rule, the transmission is usually filled with thesame oil type and weight that is utilized in theapplicable 4-Cycle engine crankcase. FIGURE 9.

3) The transmission oil level is to be maintained at thebottom of the oil filler/level plug hole. Allow any excessoil to drain out of the transmission. This proceduredetermines the correct oil level for the transmission.Correct oil level is important to insure proper centrifugalclutch operation. Maintaining the oil level too high willcause excessive centrifugal clutch slippage and resultin high oil temperature. Excessive slippage and high oiltemperature will significantly reduce the service life ofthe clutch assembly and affect the overall performanceof the Hole Digger.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 194) Inspect the oil filler/level plug gasket for propersecurity. If necessary, replace the gasket with a factoryapproved replacement part only. Reinstall the oilfiller/level plug. Tighten securely with the adjustablewrench. Wipe off any excess oil spilled on thetransmission. Properly dispose of the spilled oil.

FIGURE 9

TRANSMISSION OIL RECOMMENDATIONS.


Operating Temperature Oil Type & Weight

Above 32˚F SAE 30, 10W30, 10W40, 15W40 Below 32˚F SAE 5W30

FILLING THE ENGINE FUEL TANK.


Tools Required:

1 each, small, clean funnel.

Never mix oil with gasoline for use in a 4 cycleengine. Damage to the engine can result. Fourcycle engines do not utilize oil mixed with gasolinefor lubrication purposes.

1) Carefully clean the filler cap and the surroundingarea to insure that no dirt or debris falls into the fueltank.

2) Fill the fuel tank with gasoline as per the materialsupplied by the specific engine manufacturer.

3) Fill the tank completely. Do not overfill the tank orspill any gasoline. Replace the filler cap. Wipe anyexcess spilled gasoline from the fuel tank area.Properly dispose of any gasoline wiped from the fueltank area.

DO NOT SMOKE NEAR THE FUEL TANK. DONOT FILL THE FUEL TANK WITH THE ENGINERUNNING OR IF IT IS HOT. ALLOW AMPLETIME BETWEEN EACH REFUELING FOR THEENGINE TO COOL. AN IGNITION SOURCE INCLOSE PROXIMITY TO THE FUEL TANK CANBE THE SOURCE OF AN EXPLOSION,RESULTING IN PROPERTY DAMAGE AND/ORPERSONAL INJURY. CONSULT THE MATERIALSUPPLIED BY THE SPECIFIC ENGINEMANUFACTURER FOR INFORMATIONRELATIVE TO PROPER FUELINGPROCEDURES.

Digging OperationOPERATIONAL DISCLAIMER.


THE MANUFACTURER OF THIS HOLE DIGGERMAKES NO WARRANTY OR GUARANTEETHAT IT IS MERCHANTABLE AND/ORSUITABLE FOR SPECIFIC JOB APPLICATIONAND THAT IT WILL HAVE THE POWERREQUIRED TO DIG A SPECIFIC DIAMETERHOLE DOWN TO A SPECIFIC DEPTH IN ASPECIFIC SOIL CLASSIFICATION.

CALIFORNIA PROPOSITION 65 DISCLAIMER.


THE EXHAUST FROM THIS PRODUCTCONTAINS CHEMICALS KNOWN TO THESTATE OF CALIFORNIA TO CAUSE CANCER,BIRTH DEFECTS, OR OTHER REPRODUCTIVEHARM.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 20SPARK ARRESTER DISCLAIMER.


DO NOT OPERATE THE HOLE DIGGER ONANY FOREST COVERED, BRUSH COVEREDOR GRASS COVERED, UNIMPROVED LANDUNLESS AN APPROVED SPARK ARRESTER ISINSTALLED ON THE MUFFLER. THE SPARKARRESTER MUST BE MAINTAINED INPROPER WORKING ORDER BY THE OWNERAND/OR OPERATOR. IN THE STATE OFCALIFORNIA, THE ABOVE IS REQUIRED BYLAW. OTHER STATES MAY HAVE SIMILARLAWS. LAWS WILL APPLY ON US FEDERALLANDS. LAWS WILL VARY WITH USE INSPECIFIC COUNTRIES.

INFORMATION RELATIVE TO MINIMUMCOMPONENT STANDARDS FOR THEOPERATION OF THE HOLE DIGGER.


For operational safety and overall productivityconsiderations, it is required that specific Hole Diggercomponents meet minimum acceptable operationalstandards as follows:

1) Operator handles be properly mounted to thetransmission case sockets, per the requirements of thespecific model and be of proper structural integrity withno cuts or abrasions greater than 0.125 inch (3.2 mm)deep.

2) Operator handles are each equipped with a properlyfitting handle grip of sufficient integrity to allow forproper job function as outlined within this manual.Loose fitting handle grips or grips without full end capsare not permitted.

3) Operator handles each with a surface finish ofsufficient integrity and condition to allow for proper jobfunction as outlined within this manual. Handle surfacecondition must be properly maintained.

4) Throttle cable is in a proper mechanical conditionthat allows it to perform its intended job function asoutlined within this manual. Cables with bends,abrasions or other damage that restrict or limit innerwire movement must be replaced with a factoryapproved replacement only.

5) Throttle control is installed in the correct operatingposition and be in a mechanical condition that allows itto perform its intended job function as outlined withinthis manual. Worn or damaged throttle control handgrip or other, internal parts must be replaced withfactory approved replacement parts only. Do notoperate the Hole Digger with the plastic protectivecover missing. Do not allow foreign material toaccumulate within the throttle control assembly. Cleanall throttle control components and repair as necessaryon a regular maintenance schedule.

6) An ON/OFF engine ignition switch (if so equipped) oran ignition cut off switch (if so equipped) that allows itto perform its intended job function as outlined withinthis manual. Replace any damaged ON/OFF ignitionswitch or ignition cut off switch with a factory approvedreplacement part only.

7) Centrifugal clutch assembly in proper mechanicalcondition that allows it to perform its intended jobfunction as outlined within this manual. Replace anycentrifugal clutch assembly with operationalcharacteristics that do not allow it to properly disengageat the specified engine idle speed or properly slipduring overload conditions.

8) Each auger is in a structural condition that allows itto perform its intended job function as outlined withinthis manual. Auger axles shall not be bent at anyportion of its length. Augers with bent axles are to bediscarded and not utilized under any circumstances.

9) Earth auger(s) has/have replaceable wear parts(screw bit and teeth) that allow(s) it/them to performits/their intended job function as outlined within thismanual. An auger with a screw bit and/or tooth/teethworn past usual service life limits are not to be utilizedunder any circumstances.

OPERATION OF A HOLE DIGGER UTILIZINGCOMPONENTS NOT MEETING MINIMUMACCEPTABLE OPERATIONAL STANDARDSCAN RESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

INFORMATION RELATIVE TO COMPOSITEMATERIAL OPERATOR HANDLES.



The Hole Digger may utilize operator handlesconstructed of a specially designed, S-Typecomposite material intended to reducemachine weight and help absorb the shockloads transmitted to the operators during thedigging process. This material has shown tobe very durable and will offer a veryacceptable service life. However, it will nottolerate the same amount of external damageas steel tubing without some sacrifice of itsappearance and/or physical strengthproperties. Protect the handles from externalsources of damage. Do not allow the handlesto come in contact with augers, shovels, orother sharp and abrasive objects duringtransit. Do not stack or throw similar objectson the handles during storage. Keep thehandles clean and free of dirt, moisture,grease, oil and other, foreign materialaccumulations. Exercising properpreventative maintenance for the handles willresult in an extended service life.

USE OF THE COMPOSITE MATERIALOPERATOR HANDLES DOES NOT ELIMINATETHE POTENTIAL FOR PROPERTY DAMAGEAND/OR PERSONAL INJURY IF CONTACTWITH A BURIED ELECTRICAL CABLE ISMADE. SEE: “DETERMINATION OFPOTENTIAL SUBSURFACE HAZARDS IN THEPROPOSED DIGGING CONDITION(S)”ELSEWHERE IN THIS OPERATOR MANUAL.

1) Operator handles are constructed from a compositematerial with a demonstrated high dielectric constant.This insulating characteristic alone does not guaranteethat contact with a buried electrical cable will not allowenergy to be transmitted directly to the operators. Otherfactors reducing the insulating characteristics of theoperator handle configuration include, but are notlimited to:

a) Throttle cable. The throttle cable connects directly tothe engine according to the design offered by thespecific engine manufacture. The throttle cable ismanufactured from conductive type materials forstrength and durability purposes. This allows energy toflow from the auger through the engine and directly tothe Magura throttle control.

b) Throttle control. The Magura throttle control isfabricated from reinforced plastic. There is noguarantee the design configuration will eliminateenergy being transmitted from the throttle cable,through the throttle control and directly to the operator.

c) External condition of the operator handles.Accumulation of moisture, dirt, pitch and other foreignsubstance can provide a conductive pathway forenergy to be transmitted from the exterior of theoperator handle and directly to the operator. It isrecommended that operator handles be maintained in aclean, dry condition and free of all foreign materials.

2) The composite material is formulated by itsmanufacturer with an inhibitor to reduce (but noteliminate) the long term effects of ultra violet radiationfrom the sun. However, it is still recommended thecomposite material operator handles be protected fromultra violet radiation whenever possible to extend theirservice life.

3) Composite material operator handles are coatedwith a polyurethane finish to help protect from externaldamage and abuse. With normal usage andenvironmental effects, small strands of fiber canprotrude from the exterior surface. When performingpreventative maintenance on the Hole Digger, theprotective covering can be restored by lightly sandingthe handle surface with 240 grit sandpaper and thenapplying two, thin coats of polyurethane.

Wear all appropriate safety apparel andequipment when utilizing the sandpaper andclear polyurethane spray. Follow allappropriate safety precautions for the use ofthese materials.

4) A composite material operator handle with a cut orabrasion greater than 0.125 inch (3.2 mm) deep andone inch (25 mm) long must be removed from serviceand replaced with a factory approved replacement partonly.

5) Do not operate the Hole Digger without the properhandle reinforcement properly attached to thetransmission case sockets.


Handle reinforcements provide properstructural integrity. Use of the Hole Diggerwithout the proper operator handlereinforcement can result in handle failureand/or personal injury.

6) Do not utilize chains or slings wrapped around thecomposite material operator handles to help remove aHole Digger which has become stuck in the ground.

USE OF CHAINS AND/OR SLINGS WRAPPEDAROUND THE COMPOSITE MATERIALOPERATOR HANDLES TO HELP REMOVE AHOLE DIGGER FROM THE GROUND CANRESULT IN DAMAGE TO THE HANDLES ANDTRANSMISSION. THIS OCCURRENCE CANLEAD TO PROPERTY DAMAGE AND/ORPERSONAL INJURY.

7) Regardless of actual use, all compositematerial operator handles have a maximumservice life of 6 years. Replace any handlesubject to this time limit with a factory approvedreplacement part only.

OPERATION OF A HOLE DIGGER WITHOPERATOR HANDLES NOT MEETING THEDESCRIBED REQUIREMENTS AND/OROPERATING PARAMETERS CAN RESULTIN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

GENERAL TRANSPORTATION INFORMATION.


When transporting the Hole Digger in/on a motorvehicle, the gasoline tank breather vent (if so equipped)must be completely closed to eliminate the accidentalseepage of fuel and resulting potential fire hazard. Inorder to minimize the possibility of damage to the HoleDigger, always transport it to the job site with the augerdisconnected. Failure to properly transport the HoleDigger can cause transmission oil to becomeentrapped in the centrifugal clutch drum. Such anoccurrence can cause excessive clutch slippage untilthe oil properly drains. All equipment must be secured

in/on vehicles with suitable strapping or tie downs.Personnel should not be transported in the samecompartment as equipment and fuel supplies. Consultapplicable OSHA regulations.

DETERMINATION OF POTENTIALSUBSURFACE HAZARDS IN THE PROPOSEDDIGGING LOCATION(S).


BEFORE ATTEMPTING TO DIG WITH THE HOLEDIGGER, DETERMINE THE POTENTIALSUBSURFACE HAZARDS THAT MAY EXIST IN THEPROPOSED DIGGING LOCATION(S). POTENTIALSUBSURFACE HAZARDS MAY INCLUDE, BUT NOTBE LIMITED TO, THE FOLLOWING:

1) ROCKS OF ANY SIZE.2) ROOTS OF ANY SIZE.3) BURIED MATERIALS SUCH AS GARBAGEAND OTHER DEBRIS.4) BURIED PRESSURIZED PIPELINESCONTAINING SUCH MATERIALS AS NATURALGAS, PROPANE, ETC. 5) BURIED ELECTRICAL CABLES.

BEFORE ATTEMPTING TO DIG WITH THEHOLE DIGGER IN THE PROPOSEDLOCATION(S), CONTACT ALL APPROPRIATEAGENCIES TO DETERMINE THE EXACTLOCATION(S) OF ALL BURIED PIPELINES,POWER LINES AND MATERIAL DEBRIS. MANYUTILITIES AND OTHER AGENCIES WILLPERFORM THESE TASK AT MINIMAL CHARGEOR NO COST. HAVE ALL SUBSURFACEHAZARDS MARKED FOR EASYRECOGNITION. MACHINE CONTACT WITHTHESE AND OTHER SUBSURFACE HAZARDSCAN RESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

SET UP FOR DIGGING.


1) The Hole Digger is designed for two operators totransport it by the operator handles to, while on, andfrom the job site. Connect the auger to the Hole Diggerwith the correct factory supplied auger pin. Dependingupon the specific model, a variance in auger pin part

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 23number and design configuration exists. Models 330Hand 357H utilize the 3/8 inch (9.5mm) diameter, PN2121 auger pin. Model 343H utilizes the 5/16 inch (8mm) diameter, PN 2021 auger pin.FIGURE 10.

FIGURE 10

When installing the auger and auger pin,always place the Hole Digger with the enginespark plug in the upward position to minimizethe potential for gravity to allow oil and/orgasoline to enter into the combustionchamber and create a hydraulic lock up. Suchan occurrence can result in property damageand/or personnel injury.

The auger pin supplied with the Hole Diggeris designed to withstand the high stressesencountered while digging. Use of any otherconnecting device, including cap screws,bolts, pins, etc., can result in damage to theHole Digger driveshaft and/or auger drivehub. Improper connecting devices can causeproperty damage and/or personal injury.

DO NOT CONNECT THE AUGER TO THE HOLEDIGGER WITH THE ENGINE RUNNING. ASUDDEN AND/OR UNEXPECTED CHANGE IN

THE ENGINE SPEED CAN RESULT INPROPERTY DAMAGE AND/OR PERSONALINJURY.

THE HOLE DIGGER IS DESIGNED FOR TWOMAN OPERATION. USE BY ONLY ONEOPERATOR OR BY MORE THAN TWOOPERATORS WILL LEAD TO CONFUSION ANDLOSS OF CONTROL, RESULTING INPROPERTY DAMAGE AND/OR PERSONALINJURY. THE CONTROLS ARE DESIGNED FORONE OPERATOR (CREW MEMBER) TO STARTTHE ENGINE AND OPERATE THE ENGINECHOKE CONTROL WHILE THE OTHEROPERATOR (CREW CHIEF) HELPS MAINTAINMACHINE STABILITY AND REGULATESENGINE SPEED WITH THE TWIST GRIPTHROTTLE CONTROL.

STARTING THE ENGINE WITH THE AUGERATTACHED.


1) Grass and other overgrowth conditions will hamperthe digging characteristics of any earth auger bybecoming "clogged" around the auger teeth and screwbit. Removal of such obstructions from the holelocation before attempting to dig will increase diggingefficiency and overall productivity.

2) Place the Hole Digger in a vertical orientation on thedesired hole location. The operators should positionthemselves on firm footing.

3) The Crew Chief opens the fuel tank breather vent (ifso equipped) to its maximum set position. Failure toproperly open the breather vent will prevent the enginefrom receiving a continuous supply of fuel.

4) The Crew Member opens the fuel tank ON/OFFvalve located under the fuel tank to the ON position. FIGURE 11.


FIGURE 11

5) The Crew Chief operates the throttle control with hisright hand and provides machine stability while holdingthe remaining handle with his left hand. The Crew Chiefrotates the throttle control counterclockwise (to open)half way against its stop. The Crew Member closes theengine choke by pulling the control lever located abovethe carburetor out to its detent position. FIGURE 12.

FIGURE 12

Do not apply excessive force when pulling orpushing the choke control lever. Excessiveforce can damage the carburetor.

6) The Crew Member pulls the recoil starter handle untilengine compression is felt. Then he gives a fast, short,steady pull. Allow the starter rope to retract slowly. If

the engine does not start in three pulls, consult thematerial supplied by the engine manufacturer forspecific information. As the engine warms up, the CrewMember pushes the choke lever in to its detentposition.

7) Normally, an engine that has not been run for sometime requires three to five pulls before it will fire. On theother hand, a recently run engine will usually start onthe first or second pull. In cold weather, initial startingwill require additional pulls because an extremely richfuel/air mixture is required.

8) Allow the engine to properly "warm up" and operatewithout the requirement for engine choke. Check forproper centrifugal clutch operation, excessivetransmission noise and/or vibration.

9) Stopping the Hole Digger is accomplished byrotating the twist grip throttle control clockwise to itsmaximum, closed position and allowing the throttle armto engage the ignition cut-off switch. FIGURE 13.

FIGURE 13

I f t h e H o l e D i g g e r a n d / o r a n i n d i v i d u a lc o m p o n e n t / a c c e s s o r y d o e s n o t a p p e a rt o b e f u n c t i o n i n g p r o p e r l y, S T O P a n dd o n o t f u r t h e r o p e r a t e t h e H o l e D i g g e ru n t i l t h e n e c e s s a r y c o r r e c t i v e a c t i o nh a s b e e n c o m p l e t e d . I f y o u h a v e a n yq u e s t i o n s r e g a r d i n g t h e p r o p e ro p e r a t i o n o f t h e H o l e D i g g e r, c o n t a c tt h e C u s t o m e r S e r v i c e D e p a r t m e n tB E F O R E f u r t h e r u t i l i z a t i o n . T h e r e i sn o c h a r g e f o r t h i s s e r v i c e .


OPERATING THE HOLE DIGGER.


1) Do not attempt to begin digging with the Hole Diggeruntil both the Crew Chief and Crew Member haveacknowledged to each other that they are ready andare in full control of the machine.

2) The Crew Chief rotates the throttle controlcounterclockwise to increase the engine speed. Theauger will begin to rotate when the engine speedreaches the centrifugal clutch initial engagementspeed.

3) Normal operating procedure for the Hole Digger is todig with the engine operating at full, governed speed toallow the centrifugal clutch to become more firmlyengaged. This procedure will transmit more usablepower to the auger, resulting in greater productivity andless component wear.

When digging in areas filled with known,buried obstructions such as tree roots,rocks and other debris, operate the HoleDigger at less than ful l , governed (anintermediate) speed to insure a more rapidrelease of the centrifugal clutch when anobstruction is encountered. This is anindustry wide operating procedure.

4) The Hole Digger is equipped with a centrifugal clutchassembly within the transmission. Newton's Law ofPhysics allow the centrifugal clutch assembly toALWAYS slip (NOT DISENGAGE) wheneveroverloaded or if the auger comes in contact with aburied obstruction. The term slippage is not intended toinfer that the centrifugal clutch assembly becomes fullydisengaged with no horsepower and torque beingtransmitted to the auger. In the slipping mode, acentrifugal clutch still transmits a specific amount ofhorsepower and torque to the auger. This specificamount of horsepower and torque is directlyproportional to many factors including: the mechanicalcondition of the centrifugal clutch assembly and therotational speed of the centrifugal clutch assemblywhen the initial slippage occurs. The response time forthe centrifugal clutch assembly to react to an overloadcondition is directly proportional to its rotational speed.The higher the rotational speed (RPM) of thecentrifugal clutch at the time of overload, the greateramount of time it requires to react and actually slip.

This phenomenon is inherent with all centrifugal clutchassemblies. It is inherent with all powered equipmentincorporating such a device.

STRIKING BURIED OBSTRUCTIONS SUCH ASTREE ROOTS, ROCKS AND OTHER DEBRIS ATANY SPECIFIC ENGINE OPERATING SPEED CANCAUSE THE HOLE DIGGER TO TRANSMITREACTIONARY TYPE "IMPACT" LOADS TO THEOPERATORS. THESE TYPES OF LOADS ARECHARACTERIZED BY A SHARP, PULSATINGMOVEMENT OF THE HOLE DIGGER IN ACOUNTERCLOCKWISE DIRECTION (AS VIEWEDBY THE OPERATOR). SUCH LOADS CAN LEAD TOTHE LOSS OF OPERATOR CONTROL AND RESULTIN PERSONAL INJURY. THE OPERATIONALEFFECTS ARE ALIKE TO THAT OF UTILIZING ACOMMON ELECTRIC DRILL AND OTHER,ROTATION TYPE, POWERED EQUIPMENT. THERELATED PHENOMENON IS INHERENT WITH ALLSUCH TYPES OF ROTATION TYPE, POWEREDEQUIPMENT AND IS TERMED AS KICKBACK.UNDERSTANDING KICKBACK.


The operation of the Hole Digger involves enginetorque being transmitted and multiplied by thetransmission to the auger. The energy is then used todig holes. But to every force (action), there is always areaction force in the opposite direction. Thus, if theauger contacts a buried obstruction, the operators willfeel the left side handles of the Hole Digger being"thrusted" towards them. This "thrusting" forceexperienced by the operators is called kickback. Thespeed (and magnitude of the resulting impact force) atwhich the auger strikes the buried object is directlyproportional to the amount/speed of the kickback forceexperienced by the operators. The torque and kickbackgenerated by the digging process is inherent with aportable, two man Hole Digger and can not beeliminated by any operation and/or designcharacteristic. The operational effects are alike to thatof utilizing a common, electric drill and other, rotationtype, powered tools.

BACK CARE/PROPER LIFTING INFORMATION


In addition to kickback forces encountered during the

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 26hole digging process, the operator will be required tolift the Hole Digger and auger/auger extension withnumerous repetition, as demanded by the specific jobapplication. Utilizing proper lifting techniques willminimize fatigue and back-related injuries whileincreasing overall productivity rates.

ANATOMY

The human body is supported by the spinal column.The spinal column consists of thirty separate bonescalled vertebrae, all linked and supported by a seriesof tiny muscles. Small pads called discs are situatedbetween each vertebrae and act like shock absorbersto cushion the pressure created from external forces.The spinal column is wrapped by a system of nervesand has three natural curves:

Cervical: from the base of the neck to the brain.Thoracic: situated from the middle to the lower back.Lumbar: located from the lower back to the buttocksarea.

These three curves need to be kept in naturalalignment in order to prevent discomfort.

PREVENTATIVE MEASURES

Most occupational physicians agree on several“universal” preventative measures that an operatorshould follow to help lower the risk of back-relatedinjuries:

1) Maintain proper body weight.

2) Maintain good posture while walking or sitting.

3) Be conscious of how you twist and bend your bodywhile digging. Twisting and bending the wrong way canexert too much pressure on one side of your vertebrae.

4) Always use proper lifting techniques as describedbelow.

5) Develop a consistent exercise routine.

6) Eliminate or reduce your use of tobacco. Smokingreduces the supply of oxygen and nutrients to the discsthat cushion the vertebrae.

PROPER LIFTING PROCEDURES

The following are guidelines for properly lifting the Holedigger and auger/auger extension from the hole andare not intended to be all inclusive.Plan your path andmake sure there are no obstructions or trippinghazards. Consider how you will set the load. The spinalcolumn is a very sensitive mechanism. At any giventime, improper lifting procedures can cause damagethat can lead to injury.

1) Position your feet at a comfortable distance(shoulder width) to help provide the necessarybalance.

2) Tighten your stomach muscles by pulling in yourstomach. Keep your back as straight as possible tokeep the spine, back muscles and ligaments in correctalignment.

3) Remember to bend at the hips and knees as muchas possible.

4) Start lifting the Hole Digger with a thrust of your feetwhile lifting as much as possible with your leg muscles.Use smooth movements.

5) Once you lift the Hole Digger, keep it close aspossible to the body. Avoid turning at the waist. To turn,pivot your entire body.

6) Keep your shoulders, hips and feet pointed in thesame direction.

7) Keep your footing firm and make sure that yourintended path is clear before attempting to carry theHole Digger.

MINIMIZING KICKBACK FROM AN OPERATIONALSTANDPOINT.


Both operators should keep the left side handle asclose to their body (left hip and leg areas) as possibleto minimize machine "kickback" when a buriedobstruction is encountered by the auger. Assumeoperating positions that allow each to exercise reactive"body english" against the torque sensation created bythe digging process. Keep upper arms as close to theupper body as possible to maximize mechanicalleverage. Operators should position their backs asvertical as possible by bending the legs as required

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 27during the digging process. Positioning the left footahead of the right foot will enhance proper bodyposition. Maintaining proper operating positions is oneof the most IMPORTANT and EFFECTIVE proceduresfor controlling kickback. Improper operating positionsonly aggravate the effects of kickback upon theoperators. FIGURE 14 depicts proper operatorpositions that enhance machine control. FIGURES 15,16 and 17 depict improper operator positions thatreduce machine control .

FIGURE 14

FIGURE 15

FIGURE 16

FIGURE 17

Keep a firm, but steady, grip on the operator handles.Wrap your fingers around the handle grips, keeping thegrips cradled between the thumbs and forefingers.REMEMBER PROPER OPERATOR POSITIONSENHANCE THE CONTROL OF THE HOLE DIGGER,REDUCE OPERATOR FATIGUE AND INCREASEOVERALL PRODUCTIVITY.

Maintain the operator handles and grips ingood condition and free of moisture, pitch oilor grease. Wear gloves to improve your grip.Bent or damaged handles, or handles withdamaged and worn and/or without grips

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 28aggravate the effects of kickback upon theoperators by limiting control and comfort.Handle grips should be repaired and/orreplaced when they become worn and/ordamaged from use. Do not operate the HoleDigger until such handles are repaired and/orreplaced. Damage to property and/or personalinjury can result.

Always assume that every digging site caninclude some form of buried obstruction.Always be prepared for unexpected augercontact with buried tree roots, rocks, etc.Under certain operating conditions, striking aburied obstruction can produce a severeand/or sudden kickback force to the hipand/or leg areas. Operators must maintainphysical and mental alertness and beprepared to accommodate this phenomenon.Failure to properly accommodate thisphenomenon can result in property damageand/or personal injury.

IF, DURING THE HOLE DIGGING PROCESS, THEOPERATOR LOOSES FULL CONTROL OF THEHOLE DIGGER FOR ANY REASON, THEFOLLOWING PROCEDURE IS SUGGESTED:

AS A GENERAL RULE, AS SOON AS THEOPERATORS REALIZE THEY ARE IN THEPROCESS OF LOOSING FULL CONTROL OF THEHOLE DIGGER, THEY SHOULD "PUSH"THEMSELVES FREE AND CLEAR FROM THEOPERATOR HANDLES. THE PROCEDUREREQUIRES THE OPERATORS TO FULLYCOMPREHEND THEY ARE LOOSING CONTROL OFTHE HOLE DIGGER AND TO REACTACCORDINGLY WITH APPROPRIATE BODYMOVEMENT. IMPROPER REACTIONS TO THISPHENOMENON CAN RESULT IN PROPERTYDAMAGE AND/OR PERSONAL INJURY.

A HOLE DIGGER WITH AN IMPROPERLYMAINTAINED ENGINE THROTTLE CONTROL WILL"SPIN" ABOUT ITS AXIS WHEN THE OPERATORSLOOSE FULL CONTROL. IN THE EVENT OF THIS

OCCURRENCE, DO NOT ATTEMPT TO STOP THEENGINE BY GRASPING THE ROTATINGOPERATOR HANDLES. DO NOT INTRODUCE ANYFOREIGN OBJECT IN AN ATTEMPT TO STOPAND/OR BLOCK THE ROTATING HANDLES.INSTEAD, ALLOW THE ENGINE TO EXHAUST ITSFUEL SUPPLY. DETERMINE THAT ALLCOMPONENTS OF THE ENGINE THROTTLECONTROL ASSEMBLY ALLOW FOR PROPERFUNCTION BEFORE ATTEMPTING TO FURTHERUTILIZE THE HOLE DIGGER.

MINIMIZING KICKBACK FROM A DESIGNSTANDPOINT.


1) The Hole Digger features the longest operatorhandles of any machine of its type and/or class. Thesehandles are biomechanically positioned to enhancecontrol by allowing the operators to exert "bodyenglish" against the torque and kickback forcesgenerated by the digging process.

2) The Hole Digger utilizes antivibration handle grips onthe operator handles to enhance control and helpdampen the torque and kickback experienced by theoperators during the digging process.

Do not operate the Hole Digger if the handlegrips are worn and/or damaged from use.Replace the handle grips with factoryapproved replacement parts only.

3) The Hole Digger features operator handlesconstructed of a non metallic, composite material. Thephysical characteristics of this material allow it to helpdampen the torque and kickback experienced by theoperators during the digging process.

4) The Hole Digger utilizes a twist grip throttle control.This type of throttle control device was selected overother configurations (for the operator handleconfiguration utilized and specific digging power)because it allows the operator to wrap his thumbaround the forefinger and effectively maximize thestrength in his right hand. This design feature affordsthe operator greater control of the machine whencounteracting the effects of torque and kickback forcesduring the digging process.

5) The Hole Digger is designed to utilize the GeneralEquipment Company part number 2021 or 2121 auger

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 29pin to retain the earth auger to the transmissiondriveshaft. This pin is not intended to shear when theauger comes in sudden contact with a buried object.

The pins are utilized for the following reasons:

a) Such an occurrence (pin shear) would result inextensive physical damage to the driveshaft and augerdrive hub.

b) Even if the physical damage to the Hole Digger couldbe eliminate and/or minimized from the actualprocesses, it could require an unknown (and potentiallylarge) number of auger pins to complete the diggingprocess for any specific hole.

c) Even if the cost of the replacement auger pins is nota factor, the resulting productivity produced by theactual process would not be deemed acceptable byindustry and/or social standards for the Hole Digger.

d) Given the infinite number of soil conditions whichcould be encountered during the actual process, it isimpossible to design and supply a specific auger pin toshear at a specific torque value which would produceacceptable operational results for the Hole Digger.

e) Given the infinite number of operators and theirmethods utilized during the actual process, it isimpossible to design and supply a specific auger pin toshear at a specific torque value which would produceacceptable operational results for the Hole Digger.

f) Given the infinite number of combinations of soilconditions, auger diameter, auger boring headcondition, digging depth, mechanical operatingcondition, operators and operator methodsencountered during the actual process, it is impossibleto design and supply a specific torque value whichwould produce acceptable operational results for theHole Digger.

6) For comparison purposes, it is interesting to notethat portable electric drills do not utilize any torquelimiting or clutch device to allow the drill bit to slip at anspecific torque value for drilling purposes. As with aHole Digger, such a devise would make the drill auseless tool because of the infinite number of potentialoperating configurations and the inability to designspecific components to meet the requirements of eachoperating configuration.7) Many portable electric screwdrivers incorporate atorque limiting or clutch device which allows theoperator to preset the torque output of the tool to aspecific value. This is especially useful and desirablewhen hardware is secured to specific torque valuesaccording to industry published standards.

8) Portable electric drill and screwdrivers are twoseparate tools designed for different and specific jobapplications. The drilling process has differentrequirements than the fastening process offered byscrewdrivers. The operational characteristics ofportable electric screwdrivers can not be confusedand/or substituted for the operational characteristics ofthe Hole Digger.

OPERATING THE HOLE DIGGER CONTINUED.


5) Auger boring heads are designed for digging in awide variety of soil types and/or conditions. Each boringhead design represents a compromise in overalldigging efficiency, productivity and service life for anygiven soil condition. As a general rule, pressing downon the operator handles is not required to initiate and/orsustain the digging process. In most soils of moderateProctor Densities, augers will dig at rates that will notcause the centrifugal clutch to overload and slip. Inmost soft soils of low Proctor Densities (sandy, etc.), itmay be necessary to hold up on the operator handlesto reduce the digging rate of the auger. The naturaltendency of any auger design, in low Proctor Density soilconditions, is to dig at a rate which causes the centrifugalclutch to overload and slip. In most hard soils of highProctor Densities (hard clay, etc.), it may be necessary topress down on the operator handles to establish andmaintain acceptable digging rates. Proper diggingprocedure for any given soil condition is theaccumulation of actual experience, skill and commonsense. For any given soil condition, allow the auger todig at the rate most comfortable to the operators(exercising correct operating positions), yet not causingthe centrifugal clutch to overload and slip.

An improper operating procedure can allow theauger to "bind" and/or "bury" itself in the hole. Thisis usually the result of allowing the auger to feed atan excessive rate. This phenomenon is alsocharacteristic of digging with smaller diameter (2 to4 inch) augers. In this condition, the Hole Digger isnot capable of transmitting ample power to free theauger. Do not continue to overload and slip thecentrifugal clutch assembly. Excessive heat can becreated by the slippage resulting in clutchcomponent failure.


Damage to property and/or personal injurycan result if one or more operators losepartial and/or full control of the Hole Diggerwhile in this configuration. STOP the HoleDigger and remove it from the buried auger.The buried auger can then be retrieved byvarious, industry accepted methods.Contact the Customer Service Departmentfor specific information. There is no chargefor this service.

6) Some soil conditions may require more power to digthe hole than the Hole Digger is capable of deliveringfor a given auger diameter. This problem is morenoticeable in areas of semiconsolidated soils orcompacted soils having high Proctor Densities.Examples of such soil types include: soft shale, hardpan and caliche. The power required to dig a hole isdirectly proportional to the soil resistance encounteredby the auger and the square of the auger diameter. Forexample: a 12 inch diameter auger requires 4 times thepower than that of a 6 inch diameter, given identical soilconditions. This problem is best minimized (but noteliminated) by the addition of suitable down force bythe operators and by utilizing augers equipped withnew, replacement screw bits and teeth. Contact theCustomer Service Department for information relativeto your specific requirements. There is no charge forthis service.

IT IS A MISCONCEPTION THAT A LARGERDIAMETER HOLE CAN BE OBTAINED BYFIRST DIGGING AN INITIAL HOLE WITH ASMALLER, "PILOT" AUGER AND THENUTILIZING A LARGER DIAMETER AUGER TO"REAM" THE HOLE TO THE DESIRED SIZE.THIS METHOD WILL NOT ALLOW THEAUGER SCREW BIT TO PRODUCESUFFICIENT DIRECTIONAL STABILITY FORTHE LARGER DIA METER AUGER DURINGTHE "REAMING" PROCESS. THIS METHODWILL RESULT IN HOLE DIGGER DAMAGE,LOSS OF OPERATOR CONTROL AND/ORPERSONAL INJURY.

7) When digging in areas filled with small tree roots,small rocks or other buried obstructions, allow theauger teeth to "chip away" at the obstruction until theauger can pass by (by working the object loose) or gothrough it (as in the case of penetrating tree roots).This technique usually involves holding up on the

operator handles and establishing a minimal feed ratefor the auger. Proper operator position will minimize theeffects of kickback being generated by the auger teethcontacting the object. As with any hole diggingprocedure, the mechanics of this technique require theaccumulation of actual experience and common senseto maximize its effectiveness. Many times the size andnature of a buried object will simply prevent the augerfrom passing by or going through it. Continued diggingwith the Hole Digger will only contribute to equipmentdamage operator fatigue and/or injury. Instead, removethe buried object with a shovel or other suitable tooland proceed to dig the hole with the Hole Digger to thedesired depth.

Some job applicat ions may encounterburied obstructions that are too massive insize to allow the usage of a machine thesize and/or with the operatinglimitations of the Hole Digger. Utilization ofthe Hole Digger on these work sites cancause property damage and/or personalinjury. Exercise proper common sense byselecting the proper size and/or type ofequipment for the job application.

Some job applications may encounter soilclassifications t hat are too compacted toallow the usage of a machine the sizeand/or with the operating limitations of theHole Digger. Utilization of the Hole Diggeron these work sites can cause propertydamage and/or personal injury. Exerciseproper common sense by selecting theproper size and/or type of equipment forthe job application.

8) In most soil conditions, the auger will retract withless effort if allowed to rotate at a slow speed. Thisprocedure, however, will leave more loose soil at thebottom of the hole. To minimize the amount of loosesoil that remains at the bottom of the hole, stop therotation before retracting the auger. Proper procedurefor obtaining the cleanest, most usable hole for anygiven soil condition requires the accumulation of actualskill, experience and common sense.

9) The twist grip throttle controls the digging process byregulating the engine speed. Keep a firm grip on it at alltimes. As with any safety device, it requires constantand proper maintenance to function as intended.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 3110) Attempting to restart the engine with the auger in apartially or completely dug hole requires extra caution.In this configuration, the throttle control can beadvanced beyond the idle speed position before thetwo operators can exercise proper control of the HoleDigger. The more accepted procedure (when notutilizing both nonflighted and/or full flighted augerextensions) is to first remove the unit from the hole andrestart the engine according to the described method.Return the unit to the hole with the engine running atidle speed and proceed to complete the hole to thedesired depth.

Restarting the engine with the auger in apartially or completely dug hole requires ahigher degree of operator experience, skilland common sense over that of anintroductory or novice level of expertise.The manufacturer is aware that manyoperators restart the Hole Digger's enginewith the auger in a partially or completelydug hole on a regular basis while in thefield. The manufacturer also realizes thatthis procedure must be utilized when augerextensions are ut i l ized to extend thedigging depth. The manufacturer has nocontrol over the experience, ski l l andcommon sense levels of each operator ofthe Hole Dig ger.The manufacturer has nocontrol over each job site or specific jobapplication for the Hole Digger.

Individual operator experience, ski l l ,common sense, job site location andspecific job application must affect thefinal decision on specif ic operatingprocedures for the Hole Digger. Eachoperator must decide i f he possessesadequate/proper experience, ski l l andcommon sense for operating the HoleDigger in any given and/or specific jobapplication.

11) Both the auger teeth and screw bit must bereplaced when signs of excessive wear are visible. Aregularly scheduled maintenance program will increasethe service life of the auger and increase productivityby substantially reducing operator fatigue. An augerrequiring replacement of the auger teeth and screw bitis depicted in FIGURE 18.

FIGURE 18

Do not utilize an auger with the auger teethand screw bit worn past their specif icservice limits. Excessive wear to the augerteeth and screw bit will allow the augerflighting to wear in a tapered or invertedcone configuration. The worn boring headmay actually be only capable of digging ahole 60 to 75 percent the nominal diameterof the auger. This configuration will allowthe auger to "bind" within the hole andsubstantially reduce operator control andproductivity.

12) Avoid placing serious stress to the back and otherlower body members. Always lift in a straight line withyour legs. Maintain the back in a vertical position asallowed by the digging process. Proper wrist positionduring the digging process can minimize and/or reducestress and strain related damage potential to this bodyarea. Operator control can be enhanced and fatiguereduced by attempting to keep wrists as perpendicularto the operator handles as feasible during the diggingprocess. See BACK CARE/PROPER LIFTINGINFORMATION. FIGURE 19.


FIGURE 19

13) Stop the engine between each hole to minimize thepossibility of personal injury. Special care must beexercised in slippery conditions and in difficult,overgrown terrain to minimize any trip and fall potential.This can be accomplished with good communicationbetween the Crew Chief and Crew Operator, properattire, including shoes and the removal of any trip andfall hazard BEFORE attempting to utilize the HoleDigger on the job site.

TO REDUCE THE POTENTIAL FORPERSONAL INJURY, STOP THE HOLEDIGGER BETWEEN EACH HOLE. DO NOTCHOOSE TO SAVE TIME (THE TIMEREQUIRED TO RESTART THE ENGINE),MONEY (IN THE EVENT THE HOLE DIGGERIS BEING RENTED) OR THE ADDEDCONVENIENCE BY ELECTING TO KEEP THEENGINE RUNNING BETWEEN EACH HOLE.SUCH OCCURRENCE CAN LEAD TO LOSSOF CONTROL, RESULTING IN PROPERTYDAMAGE AND/OR PERSONAL INJURY.

STOPPING THE HOLE DIGGER.


1) Stopping the Hole Digger is accomplished byrotating the twist grip throttle control clockwise to itsmaximum, closed opposition and allowing the throttlearm to engage the ignition cut-off switch. With thethrottle control functioning properly, the engine can bebrought to the specific idle speed, the auger rotationstopped (there may be some slight rotation due to

viscous drag within the centrifugal clutch assembly.The clutch is NOT engaged.) and the ignition cut offwhen the throttle control is released or fully closed. Ifthis is not taking place, or the ignition cut-off switch cannot be engaged with throttle control movement, checkthe throttle control and throttle cable for binding and/orimproper adjustment.

2) When the engine is not in operation, turn the fueltank ON/OFF valve to the OFF position to minimize thepotential for fuel flooding the carburetor and/or enteringthe engine crankcase and/or impacting upon theenvironment.

TEMPORARY STORAGE FOR THE HOLE DIGGERWHILE ON THE JOB SITE.

Applications: All 300 Series models.

The Hole Digger can be temporarily stored on the jobsite by one of three acceptable methods as determinedby the operators based upon personal preferenceand/or job site conditions:

a) Digging a shallow hole and leaving the Hole Diggerconnected to the auger. FIGURE 20.

FIGURE 20

b) Disconnecting the Hole Digger from the augerand/or auger extension(s) and storing it in a levelconfiguration. FIGURE 21.

c) Storing the Hole Digger while connected only to alead auger with the engine spark plug facing upward.The Hole Digger is powered by a four cycle engine.This storage configuration will minimize the potentialfor crankcase oil entering the combustion chamber andcausing a hydraulic lock up. FIGURE 22.


FIGURE 21

FIGURE 22

DO NOT STORE THE HOLE DIGGER WITH THEENGINE OPERATING. IMPROPER STORAGEMETHODS CAN RESULT IN PROPERTY DAMAGEAND/OR PERSONAL INJURY.

DO NOT ALLOW THE HOLE DIGGER TO DROPAND IMPACT AGAINST THE GROUND. SUCH

ACTION CAN RESULT IN DAMAGE TO THE TWISTGRIP THROTTLE CONTROL AND ENGINE.ATHROTTLE CONTROL THAT DOES NOT OPERATEPROPERLY CAN RESULT IN PROPERTY DAMAGEAND/OR PERSONAL INJURY.

WHEN STORING THE HOLE DIGGER IN ANYONE OF THE THREE CONFIGURATIONS,TURN THE FUEL TANK ON/OFF VALVE TOTHE OFF POSITION TO MINIMIZE THEPOSSIBILITY OF FUEL FLOODING THECARBURETOR AND/OR ENTERING THECOMBUSTION CHAMBER AND/ORIMPACTING UPON THE ENVIRONMENT.SUCH AN OCCURRENCE CAN RESULT INPROPERTY DAMAGE AND/OR PERSONALINJURY.

ADDING AND REMOVING NONFLIGHTED ANDFULL FLIGHTED AUGER EXTENSIONS.


While this text covers the use of all 300Series Hole Diggers during the adding andremoving of nonflighted and full flightedauger extensions, several variances existbetween various models with the applicableengine start and stop procedures. Consultthe applicable STARTING THE ENGINE WITHTHE AUGER ATTACHED for specif icinformation.

Many digging applications require a hole deeper thanthat provided by standard length augers. For suchrequirements, both nonflighted and full flighted augerextensions are available. The nonflighted augerextension extends the digging depth by an additional15 inches (381 mm). Full flighted auger extensions areavailable in diameters up to 12 inches (305 mm) andeach with a standard 36 inch (914 mm) length.

Utilization of nonflighted and full flightedauger extensions requires addit ionaloperator experience, ski l l and commonsense over that of an introductory ornovice level of expertise. The manufacturerhas no control over the experience, skill

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 34and common sense levels of each operatorof the Hole Digger. Uti l izat ion ofnonfl ighted and ful l f l ighted augerextensions requires the accumulation ofactual hole digging experience, skill andcommon sense. Each operator must decideif his experience, skill and common senselevel is sufficient to allow him to proceedwith the utilization of nonflighted and fullf l ighted auger extensions for any givenand/o r specific job application.

Follow this accepted procedure for utilizing bothnonflighted and full flighted auger extensions to extendthe digging depth:

1) Dig to the approximate full depth of the auger,utilizing the described operating instructions. Removeas much loose soil from the hole as possible with theauger rotating at a lower rotational speed.

2) STOP the engine and remove the auger from thehole. Disconnect the spark plug wire to preventaccidental engine starting. Close the fuel tank breathervent (if so equipped). Turn the fuel tank ON/OFF valveto the OFF position.

3) Disconnect and remove the Hole Digger from theauger. Reposition the auger in the hole. Attach theauger extension to the auger and secure with an augerpin. The Hole Digger can now be connected to theauger extension and secured with an auger pin.Reconnect the spark plug wire.

4) Follow the instructions outlined for starting andoperating the Hole Digger. Use extra caution whenstarting the engine with the auger in the hole. Proceedto dig to the desired depth or to the full depth of theauger extension. FIGURE 23.

5) Use of the nonflighted auger extension to extend thedigging depth is limited to one unit. For multiple use offull flighted auger extension, repeat the aboveprocedure until the desired digging depth is achieved.

FIGURE 23

NEVER UTILIZE MORE THAN ONENONFLIGHTED AUGER EXTENSION TOINCREASE THE OVERALL DIGGING DEPTH.THE NONFLIGHTED AUGER EXTENSION ISNOT EQUIPPED WITH AUGER FLIGHTINGTO ELEVATE THE LOOSE BORINGS FROMTHE HOLE. CONSEQUENTLY, MULTIPLEUSE OF NONFLIGHTED AUGEREXTENSIONS WILL ALLOW THE AUGER TO“BURY” ITSELF IN THE HOLE. SUCH USECAN LEAD TO LOSS OF OPERATORCONTROL AND PERSONAL INJURY WHILEDIGGING.

After the desired digging depth has beenachieved, both nonfl ighted and full f l ightedauger extensions are removed by uti l izing thisaccepted procedure:

1) Remove as much loose soil from the hole aspossible with the auger rotating at an intermediatespeed. STOP the engine and disconnect the spark plugwire to prevent accidental engine starting. Close thefuel tank breather vent (if so equipped). Turn the fueltank ON/OFF valve to the OFF position.

2) Lift the auger extension(s)/auger and the HoleDigger up far enough out of the hole so that an augerextension is clear. Block the remaining auger/augerextension string with an auger fork to prevent it fromfalling back into the hole. An additional Crew Memberwill usually be required. Disconnect the Hole Diggerfrom the auger extension(s)/auger. Store on the job site

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 35as outlined above. Remove the auger extension fromthe auger/auger extension string. FIGURE 24.

FIGURE 24

3) Disconnect the Hole Digger from the blocked augerextension(s)/auger string. Store the Hole Digger on thejob site as outlined. Remove the auger extension thatis clear of the hole from the auger extension(s)/augerstring.

4) Reconnect the Hole Digger to the remaining augerextension(s)/auger string. Repeat the process until thelead auger is recovered.

5) Reconnect the engine spark plug wire.

THE PROCEDURE OUTLINED FOR THE USE OFBOTH NONFLIGHTED AND FULL FLIGHTEDAUGER EXTENSIONS OFFERS THE MOSTADAPTABLE METHOD OF EXTENDING THEDIGGING DEPTH FOR THE WIDEST CROSSSECTION OF PROBABLE OPERATORS. THISPROCEDURE TAKES INTO ACCOUNTANTICIPATED OPERATOR EXPERIENCE, SKILLAND COMMON SENSE. THE MANUFACTURER ISAWARE THAT NOT ALL OPERATORS WILL ELECTTO FOLLOW THIS PROCEDURE. THEMANUFACTURER HAS NO CONTROL OVERINDIVIDUAL OPERATING PROCEDURES AND/ORDECISIONS. MANY OPERATORS MAY ELECT TOUTILIZE THE NONFLIGHTED AUGER EXTENSIONCONNECTED DIRECTLY TO THE AUGER ANDBYPASS THE LONGER, MORE TIMECONSUMING PROCEDURE OUTLINED ABOVE.INDIVIDUAL OPERATORS MAY ELECT TO

CHOOSE OTHER PROCEDURES IN AN EFFORTTO REDUCE THE ASSOCIATED PRODUCTIONCOSTS. THE RESULTING MACHINECONFIGURATIONS CAN PLACE THE HANDLESALMOST LEVEL WITH (OR EVEN ABOVE) THESHOULDERS OF THE OPERATORS. AT THISHEIGHT LEVEL, THE HOLE DIGGER IS DIFFICULTTO CONTROL AGAINST POSSIBLE KICKBACKFORCES. THIS IS NOT A MANUFACTURERAPPROVED PROCEDURE BECAUSE IT REQUIRESEACH POTENTIAL OPERATOR TO HAVEEXCEPTIONAL HEIGHT AND EXPERT WORKEXPERIENCE, SKILL AND COMMON SENSE .UNFORTUNATELY, THERE IS STILL NO REALASSURANCE THAT EACH AND EVERYOPERATOR WITH EXCEPTIONAL HEIGHT ANDEXPERIENCE, SKILL AND COMMON SENSE CANALWAYS EXERCISE ADEQUATE CONTROL OF THEHOLE DIGGER TO GUARANTEE PERSONALSAFETY. PERSONAL SAFETY CAN NEVER BEGUARANTEED FOR ANY GIVEN AND/ORSPECIFIC JOB APPLICATION FOR ANY TYPE OFPOWERED EQUIPMENT. THE ACCEPTEDPROCEDURE, AS OUTLINED IN THIS OPERATOR'SMANUAL, IS STRONGLY RECOMMENDED. THEMANUFACTURER CAN NOT CONDONE AND/ORAPPROVE ANY OTHER PROCEDURE.

Service

DO NOT PERFORM SERVICE AND/OR REPAIRRELATED FUNCTIONS WITH THE HOLE DIGGERMOUNTED TO THE 999 SERIES DISPLAY STANDS.THESE STANDS ARE NOT DESIGNED AND/ORINTENDED FOR THESE FUNCTIONS. SUCH USECAN RESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

CHANGING THE HOLE DIGGER TRANSMISSIONOIL.


Tools Required:

1 each, small, adjustable wrench1 each, small, clean funnel with a flexible extension

spout

Changing the transmission oil will require a levelworking platform of sufficient size and appropriateheight. As an alternative, the transmission driveshaftcan be securely mounted in a suitable bench vise.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 361) Change the transmission oil every 25 hours ofoperation, or more often as necessary, if the HoleDigger is operated in extremely dusty or dirtyconditions.

2) Wipe any dust or dirt from the oil filler/level plug andoil drain plug areas of the transmission. The oilfiller/level plug is located on the side of thetransmission and is appropriately marked. The oil drainplug is located under the transmission. Remove bothplugs with the adjustable wrench and allow the oil tocompletely drain from the transmission into a suitablecontainer. Replace the oil drain plug and tightensecurely with the adjustable wrench. Dispose of theused oil per accepted procedures.

GASOLINE IS AN EXTREMELY FLAMMABLE FUEL.USE EXTREME CAUTION WHEN HANDLINGGASOLINE. DO NOT SMOKE OR BRING FIRE ORFLAME NEAR THE FUEL.

3) Using the funnel, pour 1 US quart (0.94 lit) ofGeneral Equipment Company Transmission andEngine Oil, PN 999-11, or a high grade, SAE 30Detergent or 10W30 motor oil into the transmissionthrough the oil filler/level plug opening. Use only an oilmarked with an engine service classification SF, SG orSH/CD. The oil level in the transmission is to bemaintained at the bottom of the oil filler/level plug hole.Allow any excess oil to drain out of the transmission.This procedure determines the correct oil level for thetransmission. Correct oil level is important to ensureproper centrifugal clutch operation. Maintaining the oillevel too high will cause excessive clutch slippage andresult in high oil temperatures. Excessive slippage andhigh oil temperatures will significantly reduce theservice life of the clutch assembly and affect theoverall performance of the Hole Digger.

4) Replace the oil filter/level plug. Tighten securely withthe adjustable wrench. Wipe off any excess oil spilledon the transmission. Dispose of the used oil properly.

5) Inspect the Hole Digger for loose, worn or damagedparts. Replace any questionable part or assembly witha genuine, approved factory replacement part only. Donot attempt any maintenance or repair work notdescribed in the Operator Manual. Have such workperformed at your dealer's servicing shop.

MAGURA® THROTTLE CONTROL MAINTENANCEPROGRAM.

Applications: All 300 Series models.

The Magura twist grip throttle controls engine speedduring the actual hole digging process. It has proven tobe a rugged, dependable device that deliversexceptional service life while requiring only minimalmaintenance. Every 8 hours of actual operation andwhenever the throttle cable is replaced, the followingmaintenance program is to be followed:

1) Remove the plastic cover to properly inspect theinternal components. Any worn or damagedcomponent should be replaced with a factory approvedreplacement part only. FIGURE 25.

2) Normal use will produce a wear pattern by thebraided inner cable into the idler pulley. Maximumallowable groove depth wear created by the throttlecable is 0.045 inch (1 mm). A wear depth in excess ofthis limit will require the replacement of the idler pulley.

3) Inspect the braided inner cable on a regular basis forexcessive wear and fraying in the area in direct contactwith the idler pulley. Abnormal wear or fraying willrequire the replacement of the throttle cable.

FIGURE 25

4) Inspect the barrel end of the braided inner cable forproper retention on a regular basis. A properly retainedbarrel end will have no relative movement between itand the inner cable. Any relative movement will requirethe replacement of the throttle cable. FIGURE 26.


FIGURE 26

5) Inspect the receptacle area of the throttle controlwhich retains the barrel end of the braided inner cableon a regular basis. A properly fitted barrel fitting shouldhave complete freedom of movement with no bindingrestrictions or excessive play due to wear. A barrelfitting which is binding within the receptacle should bediscarded in favor of a replacement throttle cable.Excessive receptacle wear will require replacement ofthe specific component assembly. FIGURE 27.

FIGURE 27

6) The rubber boot assembly is designed to protect theinternal components of the throttle control fromexcessive foreign material accumulations. The servicelife of the boot assembly can be extended with theapplication of an appropriate preservative on a regularbasis.

Do not operate the Hole Digger without arubber boot assembly in proper condit ionmounted in pos i t ion on the Magurathrot t le contro l . Wi thout the use of aproper rubber boot assembly, fo re ignmater ia ls can accumula te w i th in thethro t t l e cont ro l assembly. Such anoccurrence can restr ict the movement ofthe in te rna l components , reduc ingoperator control of the Hole Digger andresu l t in p roper ty damage and /orpersonal injury.

7) Inspect the handle grip on a regular basis todetermine it is properly secured to the throttle control.A grip which fits loose on the throttle control or hasbecome worn or torn from use should be replaced witha factory approved replacement part only.

AUGER MAINTENANCE PROGRAM.


All General 300 Series Hole Diggers utilize earthaugers incorporating the Pengo® type boring headconfiguration. This design has been field proven forseveral decades to provide unequaled diggingperformance in a wide range of unconsolidated andsemiconsolidated soil formations. As with any groundengaging tool, the service life of the wear componentswill have limits directly affected by soil classification,soil moisture content and general operatingprocedures. A consistent auger maintenance programwill provide maximum digging performance andinvestment return.

REPLACING A WORN AUGER SCREW BIT.

Application: All augers.

Tools Required:

2 each, 1/2 inch wrenches.

Parts Required:

1 each, PN SB25 Screw Bit (for use with all augers withthe exception of the 3 and 4 inch nominal diameter augers).

1 each, PN SB35 Screw Bit (for use with 3 inch nominal diameter earth auger).

1 each, PN SB45 Screw Bit (for use with 4 inch nominal diameter earth auger).

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 38Note: Tungsten Carbide hardfaced versions (SB25C,SB35C and SB45C) of each applicable screw bit areavailable. A screw bit hardfaced with Tungsten Carbidewill not increase the overall productivity rates of aspecific auger equipped with the standard screw bit.The Tungsten Carbide hardfacing will only substantiallyincrease the anticipated service life of a screw bit.

1) The replacement of the auger screw bit will require alevel working platform of sufficient size and appropriateheight.

2) Inspect the auger for worn or broken components.Check to determine that the auger does not have abent or damaged axle. A bent or damaged axle willcause the auger to "wobble" during use. Maximumallowable auger wobble is 0.25 inch (7 mm) totalindicated runout (TIR). An auger with a total indicatedrunout wobble in excess of this value should beremoved from service and scrapped.

DO NOT OPERATE AN AUGER WHICH HAS ABENT OR DAMAGED AXLE WITH A TOTALINDICATED RUNOUT EXCEEDING THEMAXIMUM ALLOWABLE LIMIT. EXCESSIVEAUGER WOBBLE CAN REDUCE OPERATORCONTROL, RESULTING IN PROPERTYDAMAGE AND/OR PERSONAL INJURY.

3) Using the wrenches, remove the cap screw whichretrains the screw bit to the drive lug. Remove the wornscrew bit and properly dispose.

4) Inspect the drive lug for signs of excessive wear anddamage. To replace the drive lug, it must be removedfrom the auger plate with either a suitable saw orcutting torch.

5) Install the replacement screw bit and retaininghardware to the drive lug. Hardware is unidirectional.Secure tight with the wrenches.

REPLACING WORN AUGER TEETH.

Application: All augers 6 inch diameter and larger.

Tools Required:

1 each, 1/4 inch drift punch.1 each, suitable safety glasses.1 each, plastic hammer or,1 each, soft type hammer specifically designed for

impact use.Parts Required:

Required Quantity, 35 Standard Dirt Tooth or,Required Quantity, 35HFC Hardfaced Dirt Tooth or,Required Quantity, 5T30 Chisel Tooth or,Required Quantity, 5T30HFC Hardfaced Chisel Tooth,orRequired Quantity, 1336 Tungsten Carbide Tooth.Note: Augers utilized with the 300 Series Hole Diggersfeature a wide variety of available tooth designs andconfigurations to increase their productivity rates andmaximize service life during the digging process.

Teeth are forged from alloy steel and heat treated toextend their service life. All teeth incorporate the sameretaining system and are fully interchangeable as far astheir configuration and usage allow. Available teethinclude the following:

35 Standard Dirt Tooth. For ordinary diggingconditions. Thin cross section for fast penetration.Wears sharp. Install in all sockets of all boring heads.Service Life Factor: 1.

35HFC Tooth. Same as the 35 Standard Dirt Toothwith the exception of hardface material deposited onone side. Install with the hardface material facing up.Service Life Factor: 2 to 4.

5T30 Chisel Tooth. Helps rip through caliche, hardpanand other semiconsolidated soil formations. Install onlyin the inside sockets of boring heads with the rib facingup towards the drive hub. Not for use alone with 6 inchdiameter augers. Its use increases the service life ofother tooth configurations. Service Life Factor: 1.5.

5T30HFC. Same as the 5T30 Chisel Tooth with theexception of hardface material deposited on one side.Install with the hardface material facing up. Service LifeFactor: 2 to 5.

1336 Tungsten Carbide Tooth. For use in extremelyabrasive soil formations and frozen soils. Not for usein soil formations containing a high percentage of rocklarger than the size of a golf ball. Its use in soilformations containing a large percentage of rock canresult in chipping damage to the Tungsten Carbideinserts. Delivers extended service life over standardand hardfaced tooth configurations in most soilformations. Its use will not normally increaseproductivity rates over standard and hardfaced toothconfigurations. Service Life Factor: 2 to 10.

1) The replacement of the auger teeth will require alevel working platform of sufficient size and appropriateheight. Wear safety eyewear and any other safetyapparel deemed appropriate for the job applicationand/or job site environment.


WEAR SAFETY EYEWEAR AND ANY OTHERSAFETY APPAREL DEEMED APPROPRIATEFOR THE JOB APPLICATION AND/OR JOBSITE ENVIRONMENT. THE TOOTHREPLACEMENT PROCESS CAN CREATEFLYING STEEL CHIPS AND/OR OTHERDEBRIS. CAUTION ALL ONLOOKERSREGARDING THE POSSIBILITY OF AND/ORTO REMAIN CLEAR OF FLYING DEBRIS.IMPROPER SAFETY PROCEDURES CANRESULT IN PROPERTY DAMAGE AND/ORPERSONAL INJURY.

2) Using the hammer and drift punch, strike the visibleend of the tooth located in the core print area with asmooth movement. Repeat the action until the worntooth become loose within the core print area of thecasting. FIGURE 28.

FIGURE 28

3) Remove the worn rubber lock from the core printarea and properly dispose. Both solid, round and flatlocking device configurations are utilized.

4) Inspect the core print area of the casting forexcessive wear and/or damage. A core print area withexcessive wear will not properly support a replacementtooth. Excessive wear is usually the indication that theauger has been worn past its useful service life andshould be removed from service. An auger withexcessive wear is depicted in FIGURE 29.

FIGURE 29

5) Lubricate the replacement rubber lock with water. Oilis not an acceptable lubricant. Install the solid, roundtype rubber lock into the hole in the core print area.The flat type locking device installs around the coreprint area. FIGURE 30.

FIGURE 30

6) Install the replacement tooth into the core print areaby striking the cutting edge of the tooth with thehammer. Use a smooth movement.


DO NOT STRIKE ANY REPLACEMENTTOOTH DIRECTLY WITH A STEEL HAMMER.SUCH AN OCCURRENCE CAN CREATEFLYING STEEL CHIPS AND OTHER DEBRIS,RESULTING IN PROPERTY DAMAGEAND/OR PERSONAL INJURY. CAUTION ALLONLOOKERS TO REMAIN CLEAR OF THEAREA WHEN PERFORMING AUGERMAINTENANCE.

7) Determine the replacement tooth is properly seatedwithin the core print of the casting. Excessive castingwear will not properly seat a tooth, allowing it to fallloose and become lost.

ENGINE SERVICE.


Consult the applicable material supplied by the enginemanufacturer for specific service and maintenanceinformation regarding:

1) muffler2) spark plug3) air filter4) carburetor adjustment5) ignition timing6) short and long term storage

Keep this information stored with the Operator Manualfor the Hole Digger so it will always be available for usewhen the engine requires service or maintenance. Aproperly maintained engine will add considerably to theservice life and overall productivity of the Hole Digger.If you require operation material for a specific engineutilized on a Hole Digger, contact the Customer ServiceDepartment. There is no charge for this service.

Under Title 13 of the California Code of Regulations,the California Air Resource Board (CARB) hasidentified several important engine service relatedsubjects. The material supplied by the specific enginemanufacturer will include the following information:

1) Statement of Compliance.2) engine oil recommendations.3) engine fuel recommendations.4) maintenance information.5) other information as required by the California AirResource Board.6) emission component warranty statement.If you have any question regarding emission

components, warranty rights and responsibilities for aspecific engine utilized on a Hole Digger, contact theCustomer Service Department for specific information.There is no charge for this service.

Repair

DO NOT PERFORM SERVICE AND/ORREPAIR RELATED FUNCTIONS WITH THEHOLE DIGGER MOUNTED TO THE 999SERIES DISPLAY STANDS. THESE STANDSARE NOT DESIGNED AND/OR INTENDEDFOR MAINTENANCE FUNCTIONS. SUCHUSE CAN RESULT IN PROPERTY DAMAGEAND/OR PERSONAL INJURY.

BASIC INFORMATION.


The 300 Series Hole Diggers utilize a fully enclosed,double reduction transmission for multiplying andtransmitting engine torque to the auger. The principleinvolves engine horsepower and torque beingtransmitted through a centrifugal clutch and two sets ofgear reductions into a final driveshaft. Oil is providedfor lubrication and heat dissipation for the bearings,gears and clutch assembly.

The principal variance which exists between specificmodels occurs with the driveshaft configuration(General (1-3/8 inch/35 mm) hexagon, Ground Hog(7/8 inch/22 mm) square or Stihl. FIGURE 31.

FIGURE 31


Other major components are equally shared betweenall 300 Series Hole Diggers, including operatorhandles, throttle control, transmission case andbearings.

A pressure relief valve, PN 5677, is located on the topsurface of the transmission cover to relieve any excesspressure created in the transmission due to heat rise.Should this valve become plugged, the followingproblems can occur:

1) The final driveshaft oil seal can push out of itshousing, causing a loss of transmission oil.

2) The gasket that separates the two sections of thetransmission can push out, causing a loss oftransmission oil.

The potential for these problems can be minimized bycleaning the pressure relief valve at regular intervals.

Oil leakage between the final driveshaft and the oil sealis the result of the following problems:

1) The oil seal is worn due to extended operation.

2) The inner sealing lip of the oil seal is cut or nickeddue to the admission of foreign material or some sharp,abrasive object.

3) A replacement oil seal was incorrectly installed in thetransmission.

In all cases, a replacement oil seal must be correctlyinstalled to prevent loss of transmission oil. The oilseal, a NATIONAL® PN 471820, is an industryinterchange standard and can usually be obtained fromlocal supply sources to help reduce downtime.

TRANSMISSION OIL SEAL REMOVAL ANDINSTALLATION.


Tools Required:

1 each, small, adjustable wrench2 each, 1/2 inch wrenches1 each, torque wrench, 600 inch pounds (68 N.m.)

capacity with 1/2 inch and 15/16 inch socketsor

1 each, torque wrench, 840 inch pounds (95 N.m.)capacity with 1/2 inch and 1-7/16 inch sockets

1 each, 1/2 inch drive socket wrench with 15/16 inch

socketor

1 each, 1/2 inch drive socket wrench with 1-7/16 inch socket

1 each, plastic hammer1 each, three jaw gear puller1 each, shop press

Parts Required:

1 each, PN 310-0101 transmission gasket1 each, PN 471820 National® oil seal or industry

equivalent1 each, PN 15 alloy Woodruff key (if required)1 each, PN 330H-0330 final driveshaft (for Model

330H, if required)1 each, PN 343H-0330 final driveshaft (for Model

343H, if required)1 each, PN 357H-0330 final driveshaft (for Model

357H, if required)2 each, PN 08125 bearing cones (if required) 1 each, container of Barium or Lithium based,

lubricating grease1 each, container of bearing & shaft locking grade,

anaerobic adhesive/sealant1 each, container of wheel bearing grease1, each, PN 999-11, transmission and engine oil orequivalent.

1) The repair of the Hole Digger will require a levelworking platform of sufficient size and appropriateheight. As an alternative, the transmission driveshaftassembly can be securely mounted in a suitable benchvise.

2) Drain the fuel from the fuel tank and the remainingoil from the transmission. Refer to the Service sectionfor more detailed information.

GASOLINE IS AN EXTREMELY FLAMMABLEFUEL. USE EXTREME CAUTION WHENHANDLING GASOLINE. DO NOT SMOKE ORBRING FIRE OR FLAME NEAR THE FUEL.

3) Using the plastic hammer, split and separate thetransmission cover and case. Exercise caution not todamage the alignment dowel pins. Place the engineand transmission cover assembly in an upright positionin a suitable area. Do not damage the throttle cable.Remove the primary gear and pinion gear assembly.

4) Clean the transmission case with an appropriatesolvent.


Observe all applicable safety precautionsfor the solvent.

5) Remove the self-locking nut, PN 19160001 and flatwasher, PN 17160000.

6) Using the gear puller, remove the secondary gear,PN 345-0350 from the driveshaft. Remove theWoodruff key, PN 15, and the Nilos ring, PN08125/08231B-AV.

7) Using the shop press and suitable blocking, supportthe driveshaft housing area of the transmission case toprevent deformation damage. Press the driveshaft outof the transmission. The oil seal should also press outat this time. FIGURE 32.

FIGURE 32

Wear safety glasses and other appropriatesafety equipment when pressing thedriveshaft assembly. Caution all onlookersabout the possibility of flying debris andthe potential for personal injury.

8) Remove the bearing cone, PN 08125, from the shaft.Inspect the driveshaft for chipping or cracking aroundthe Woodruff key area. If any damage is evident,replace the driveshaft.

9) Inspect the area where the oil seal rotates about thedriveshaft for scratches, chips or other imperfections

which can cause oil to leak past the oil seal. Unless theinner sealing member of the replacement oil seal turnson a concentric, smooth surface, it also will continue toleak oil. If the depth of the groove cut into the finaldriveshaft is greater than .010 inch (0.25 mm), thedriveshaft must be replaced.

10) Inspect the replacement oil seal for cuts or otherimperfections around the sealing members. Pack thecavity between the inner and outer sealing memberswith a Barium or Lithium based lubricating grease.LUBRIPLATE 105 is an approved lubricant. Thisprecautionary measure minimizes the possibility of adry oil seal rotating on a dry shaft during the first fewminutes of operation. FIGURE 33.

FIGURE 33

11) Slide the oil seal over the circular spacer of thedriveshaft with a circular, twisting motion. The crimpedside of the oil seal, marked "NATIONAL 471820 USA"faces away and opposite the threaded end of thedriveshaft. Use caution not to cut or nick the sealinglips when installing the oil seal.

12) Clean and inspect both bearing cones. Replace ifexcessive wear is evident. Repack both bearings witha suitable wheel bearing grease. Reinstall the lowerbearing cone on the driveshaft against the spacer.

13) Clean and inspect the transmission oil seal housingfor damage. If the housing shows signs of "galling"damage or elongation, coat the outside diameter of theoil seal with a bearing locking grade of anaerobicadhesive/sealant to help retain it in position.

14) Position the transmission case on the shop presswith the driveshaft housing face up. Determine that thetransmission case is not being supported by thealignment dowel pins. Use Service Tool PN 345-7010,to press the oil seal/driveshaft assembly into thetransmission until the oil seal is firmly seated against

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 43the machined shoulder. Cocking the seal in the housingcontributes to oil seal failure. The tool is approximately2.431 inches (61.7 mm) outside diameter. The insidediameter of the tool is approximately 2-1/4 inches.Apply the face of the service tool to the crimped beadof the oil seal, inasmuch as pressure too close to thecenter of the seal will distort or damage it. FIGURE 34.

FIGURE 34

If an arbor press is not available, the oil seal may betapped in place with the same service tool or a thin,wooden block and plastic hammer. Take care toposition the seal against the machined shoulder withthe bore at right angles to the shaft. Cocking the seal inthe housing contributes to oil seal failure. UNDER NOCIRCUMSTANCES SHOULD THE OIL SEALRECEIVE DIRECT HAMMER BLOWS. FIGURE 35.

FIGURE 35

15) Reinstall the upper bearing cone, Nilos ring andWoodruff key on the final driveshaft. Coat the Woodruffkey area of the driveshaft with light oil or with theBarium or Lithium based lubricant. Reinstall thesecondary gear and flat washer.

16) Apply a small amount of anaerobicadhesive/sealant to the protruding threads of the finaldriveshaft. Torque the 1-1/4 inch self-locking nut to 60-70 foot pounds (81-95 N.m). Check to determine theflat washer is tight against the secondary gear and it, inturn, is seated against the Nilos ring. If not fully seated,use a thin, wooden block and a plastic hammer to tapthe gear down into place. UNDER NOCIRCUMSTANCES SHOULD THE SECONDARYGEAR RECEIVE DIRECT BLOWS FROM A STEELHAMMER. Tap both ends of the driveshaft with aplastic hammer to help set the bearings. Loosen the 1-1/4 inch self-locking nut and retorque to 60 foot pounds(81 N.m.). Again, check to determine the flat washer istight against the secondary gear. Tap both ends of thedriveshaft with a plastic hammer to help set thebearings.

17) Attach the torque wrench and 1-7/16 inch socket tothe 1-1/4 inch self-locking nut and rotate slowly. AMAXIMUM bearing drag of 30 INCH POUNDS (3.4N.m.) is permitted. This value should allow aMAXIMUM of .003 inch (0.076 mm) freeplay in thebearings. A greater amount of bearing drag willsignificantly decrease the load capacity of the bearingsand contribute to premature bearing failure. Adjust thetorque value of the self-locking nut to yield a bearingdrag within the allowable limit. THE FLAT WASHERMUST BE TIGHT AGAINST THE SECONDARY GEARAND THE GEAR TIGHT AGAINST THE NILOS RINGTO PREVENT DRIVESHAFT FREEPLAY THATEXCEEDS THE ALLOWABLE LIMIT. If the bearingdrag value is less than or greater than the 30 inchpound (3.4 N.m) figure, readjust the self-locking nuttorque value accordingly to help produce the desiredvalue. FIGURE 36.


FIGURE 36

It is important to note that the precisionmachining tolerance between the driveshaftdiameter and the secondary gear insidediameter can cause binding duringassembly. This binding can prevent thegear from firmly seating against the Nilosring and be the cause of excessivedriveshaft freeplay.

18) Reinstall the primary gear and pinion assembly. Ifthe existing transmission gasket is damaged, replacewith PNG 310-0101 gasket. Use of a transmissiongasket is required to provide for adequateclearance. Do not substitute a silicon material orgasket adhesive for a factory approved gasket.Realign the transmission dowel pins when reinstallingthe engine and cover assembly. Torque all fasteners to20 foot pounds (27 N.m.) in an "X" sequence.

19) Rotate the final driveshaft and check for excessivenoise and/or binding. If excessive noise and/or bindingis evident, disassemble the transmission andinvestigate for probable causes. Reassemble andretorque to the specified amount. Recheck again forexcessive noise and/or binding.

20) Fill the transmission with oil. Refer to the Servicesection for the correct amount and type.

CENTRIFUGAL CLUTCH REMOVAL ANDINSTALLATION.


The 330H, 343H and 357H Hole Diggers utilize an allmetal centrifugal clutch rotor and shoe assembly thatexpands with engine RPM to engage the clutch drumand transfer torque. The centrifugal clutch rotor andshoe assembly is mounted to and operatesconcentrically about the engine crankshaft. Symptomsfor replacement of the clutch assembly include thefollowing:

1) Excessive clutch slippage and auger stalling at full,governed engine speed.

2) Partial clutch engagement (and resulting augerrotation) at the specified engine idle speed.

To replace the clutch assembly, proceed as follows:

Tools Required:

2 each, 1/2 inch wrenches1 each, three jaw gear puller (if required) 1 each, plastic hammer1 each, torque wrench, 240 inch pound (27 N.m.)

capacity with 1/2 inch socket1 each, 1 inch (25.4 cm) capacity micrometer1 each, feeler gauge set1 each, 3/16 inch Allen wrench1 each, 1/8 inch, long handle type Allen wrench

Parts Required:

1 each, PN 3516 drum and pinion assembly1 each, PN 330H-0175 rotor and shoe assembly1 each, PN 200682 plastic washer1 each, PN 310-0101 transmission gasket (if required)1 each, PN 6, alloy Woodruff key (if required)1 each, container of high temperature, anti-seize

compound1 each, container of wicking grade, anaerobic

adhesive/sealant

Centrifugal clutch removal and installation will requirea level working platform of sufficient size andappropriate height. As an alternative, the transmissiondriveshaft assembly can be securely mounted in asuitable bench vise.

1) Drain the fuel from the fuel tank, oil from thetransmission and oil from the engine. Refer to theService section for more detailed information.


GASOLINE IS AN EXTREMELY FLAMMABLEFUEL. USE EXTREME CAUTION WHENHANDLING GASOLINE. DO NOT SMOKE ORBRING ANY FIRE OR FLAME NEAR THEFUEL.

2) Split and separate the transmission cover and case.Exercise caution not to damage the dowel pins.Remove the primary gear and pinion assembly, PN7034 and PN 345-0310.

3) Clean the transmission case with an appropriatesolvent.

Observe all applicable safety precautions for thesolvent.

4) Using the 3/16 inch Allen wrench, remove the Allenscrew from the side of the transmission cover. This willprovide access for removing the centrifugal clutch rotorand shoe assembly. FIGURE 37.

5) Using the 1/8 inch Allen wrench, loosen the two setscrews which retain the PN 330H-0175 rotor and shoeassembly to the engine crankshaft. Removal of theclutch rotor and shoe assembly may require the use ofa gear puller. FIGURE 38 and 39.

If a gear puller is necessary to remove the PN330H-0175 rotor and shoe assembly from theengine, exercise appropriate caution to minimizethe occurrence of any structural damage to therotor. Any structural damage to the rotor and shoeassembly will require its replacement. Wear safetyeyewear and other, appropriate safety equipment.Caution all onlookers about the possibility of flyingdebris and the potential for personal injury.

FIGURE 37

FIGURE 38

6) Remove clutch drum and pinion assembly, PN 3516and washer, PN 200682, from the transmissiondriveshaft.

7) Inspect the engine crankshaft and PN 61 Woodruffkey for signs of cracks and other damage. Replace theWoodruff key if wear and/or elongation are visible.Measure the engine crankshaft with a micrometer. Theminimum allowable crankshaft diameter is .868 inch(22.0 mm). The maximum allowable TIR limit in thegear pinion journal area of the crankshaft is .003 inch(0.076 mm), relative to the crankshaft itself. Replacethe crankshaft assembly if it is not within thisestablished limit.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 468) Clean the surface of the crankshaft with anappropriate solvent.


9) Install the replacement PN 330H-0175 clutch rotorand shoe assembly on the engine crankshaft with thehub, including the two set screws, toward thecrankcase. Tighten with the 1/8 inch Allen wrench.FIGURE 39. The end of the crankshaft fits flush againstthe edge of the clutch rotor and shoe assembly.FIGURE 40.

FIGURE 39

10) Using the 3/16 inch Allen wrench, replace the Allentype access screw into the side of the transmissioncover. Apply a wicking grade of anaerobic adhesive tothe Allen screw. This will eliminate the screw frommoving during operation of the Hole Digger. FIGURE 40.

FIGURE 40

11) Install the washer, PN 200682, on the transmissiondriveshaft. Apply a small amount of high temperature,anti-seize compound to the pinion gear journal area ofthe driveshaft. Install the replacement PN 3516 clutchdrum and pinion assembly on the driveshaft.

12) Reinstall the primary gear and pinion assembly. Ifthe existing transmission gasket is damaged, replacewith PN 310-0101 gasket. Use of a transmissiongasket is required to provide for adequateclearance. Do not substitute a silicon material orgasket adhesive for a factory approved gasket.Realign the transmission dowel pins when reinstallingthe engine and cover assembly. Torque all fasteners to20 foot pounds (27 N.m.) in an "X" sequence.

13) Rotate the final driveshaft and check for excessivenoise and/or binding. If excessive noise and/or bindingis evident, disassemble the transmission andinvestigate for probable causes. Reassemble andretorque to the specified amount. Recheck again forexcessive noise and/or binding.

14) Fill the transmission with oil. Refer to the Servicesection for the correct amount and type.


TroubleshootingApplication: All 300 Series models.

ENGINE.

ENGINE FAILS TO START.Ignition switch (if equipped) in OFF position. Place inON position.

Ignition cut-off switch (if equipped) improperly adjusted.Adjust throttle cable.

Incorrect carburetor adjustment. See Service section.

Ignition wire to spark plug loose or disconnected.Reconnect.

Fuel supply exhausted. Refill fuel tank.

ENGINE LOSES POWER.


Water in fuel supply. Drain and replace fuel.

Plugged engine exhaust ports. See Service section.Dirty spark plug. See Service section.

Incorrect throttle control/cable adjustment. SeeAssembly section.

Fuel tank breather vent closed (if so equipped). Openvent.

Dirty air filter. See Service section.

ENGINE OVERHEATS.


Cooling fins clogged with debris. Remove engineblower housing and clean cooling fins.

OPERATIONAL PROBLEMS.

HOLE DIGGER LACKS POWER.

Incorrect transmission oil level. See Service section.

Centrifugal clutch worn. See Repair section.

Auger diameter too large for given soil condition. See

Digging Operation section.

Incorrect throttle control/cable adjustment. SeeAssembly section.

AUGER ROTATES AT IDLE SPEED.Incorrect throttle control/cable adjustment does notpermit proper engine idle speed. See Assemblysection.

Centrifugal clutch worn. See Repair section.

Incorrect engine idle speed. See Service section.

StorageApplication: All 300 Series models.

Proper procedure for long term storage of the HoleDigger will protect it against the affects of corrosion anddamage. If the Hole Digger is not to be operated for aperiod of 30 days or more, proceed to store as follows:

1) Clean all accumulated dirt and grease from the HoleDigger utilizing an appropriate solvent.


2) Follow the procedure as outlined in the materialsupplied by the engine manufacturer detailing longterm storage of the engine.

3) Drain the transmission and refill with clean oil that issuitable for use when the Hole Digger will be nextutilized.

4) Check all visible parts for wear, breakage ordamage. Order any part required to make thenecessary repair. This will avoid a needless delaywhen operating the Hole Digger at next use.

5) Apply a light coat of protective grease to thetransmission driveshaft to prevent the formation of rust.

6) Do not store the Hole Digger connected to an auger.

300 SERIES MAN HOLE DIGGERFORM GOM12070702, VERSION 1.2 48Always store the Hole Digger with the operator handleslevel with the ground. By not storing the Hole Digger inthis configuration, transmission oil may drain from thebreather vent and damage the surroundingenvironment. If the Hole Digger is powered by a 4Cycle gasoline engine, this configuration will minimizethe potential for crankcase oil entering the combustionchamber and creating a hydraulic lock up.

7) Close the fuel tank breather vent (if so equipped) toits maximum set position.

8) Turn the fuel tank ON/OFF valve to the OFF position.

9) Turn the ignition ON/OFF switch (if so equipped) tothe OFF position.

10) Store the Hole Digger inside. If the Hole Diggermust be stored outside, protect it and each auger witha suitable covering.

SpecificationsApplications: 330H, 343H and 357H Hole Diggerspowered by the Honda GXV160 engine.

ENGINE.

TYPE HONDA GXV160

HIGH SPEED 3800 RPM (no load)

IDLE SPEED 1600 RPM

SPARK PLUG GAP .028 to .031 inch (0.7 to 0.8 mm)

FUEL Unleaded (Regular grade is an acceptablesubstitute) grade gasoline. Consult the materialsupplied by the engine manufacturer for specificinformation.FUEL TANK 1.2 US quart (1.1 lit) CAPACITY

TRANSMISSION.

TYPE Enclosed, spur geared, double reduction.

REDUCTION RATIO 25 to 1

OIL CAPACITY 1 US quart (0.94 lit)

OIL SPECIFICATION High quality motor oilclassified for service SF, SG or SH/CD. Refer toTRANSMISSION OIL RECOMMENDATIONS for

specific information.

CLUTCH 4 inch (102 mm) diameter,automatic type centrifugal

AUGER CAPACITY 2 inch (51 mm) diameter up toand including 18 inch (457 mm) diameter. Refer toDigging Operation for specific information.

GENERAL.

REQUIRED NUMBER OF OPERATORS 2

LEAD AUGER SERIES General 4400Series for Model 330H, General PSD Series for Model343H and General BT360 Series for Model 357H.

AUGER EXTENSION SERIES General 5500Series for Model 330H, General PSD Series for Model343H and General BT360 Series for Model 357H.

CE CERTIFICATION: The 300 Series Hole Diggerscomplies with the mandatory requirements of98/37/EC.



LEFT BLANK INTENTIONALLY


Replacement Parts Diagrams300 Series Hole Diggers


Replacement Parts DiagramPlastic Series 314

Magura® Throttle Control Assembly300 Series Hole Diggers

ReferenceNumber

PARTNUMBER DESCRIPTION QUANTITY

12345678

310-0030-010-A310-0030-020-A310-0020-030310-0030-040310-0030-050310-0030-060310-0030-070310-0020-080

Body Assembly, (Includes P/N 310-0030-040, Qty 2)Tube, Throttle (Includes P/N 310-0020-030)

Grip, HandleScrew, Pan Head, M5 x 20

Screw, Self TappingCover, Top

Sheave, RollerBoot, Rubber

11121111

Replacement Parts DiagramPlastic Series 314

Magura® Throttle Control Assembly300 Series Hole Diggers


Replacement Parts DiagramOperator Handle Assemblies

300 Series Hole Diggers

Throttle Control handleOne Assembly Per Machine

Operator handleThree Assemblies Per Machine


Replacement Parts DiagramHandle Assemblies

300 Series Hole DiggersReferenceNumber


123456789101112

1314

310-0091-A310-0092-A310-0030330-0070310-0081310-0011310-001215051800170400001605000018050000WS-277

330-0320CC-1

330H-5040

Handle, Throttle (Includes P/N 310-0012)Handle, Operator (Includes P/N 310-0011 & P/N 330-0070)

Throttle, Twist Control, Plastic, CompleteGrip, Handle

Cable, ThrottleTube, Handle Brace

Tube, Handle Brace (Throttle)Screw, Cap, 5/16” x 2-1/4” UNC, Grade 5, Plated

Washer, Flat, 1/4”, PlatedWasher, Lock, 5/16”, PlatedNut, Hex, 5/16” UNC, Plated

Assembly, SwivelAssembly, Swivel (GXV160 Honda Engine Only)

Clip, ThrottleDecal, Ignition

(Used On Four Cycle Engines Only)

1313131888811111


Engine And Cover Assembly330H, 343H, & 357H Hole Diggers

Equipped with Honda GXV160 Engine[Used Starting With 330H Serial Number 33022419]

[Used Starting With 343H Serial Number 27263][Used Starting With 357H Serial Number 26019]


Engine And Cover Assembly330H, 343H, & 357H Hole Diggers



ReferenceNumber


12345678910111213141516171819202122232425262728293031

GXV160 Replace330-0136-A330H-0175

6203-2RS-1231040201

6620606017402020115051800

AN-960-516L1605000018050000COV-0411330H-0020

5677330-0320310-0531

330H-5030330H-5040SG24-5072310-5041210-5021

GECD-5010W330H-0310330H-034037050300330H-0200SP8-5041330H-5070

16611-ZG9-U8017954-ZG9-U80

Engine, Honda (5.5 HP)Cover, Transmission (Includes P/N 6203-2RS-12)

Rotor And Shoe Assembly, ClutchBearing, Ball

Screw, Set, Cup, 1/4-28 x 1/4”Key, Woodruff, 5/32” x 5/8”, Alloy

Bolt, Shoulder, (3/8” x 3/4” x 5/16-24 UNF)Plug, Pipe, 1/8-27 PTF

Screw, Cap, 5/16-18 UNC x 2-1/4”, PlatedWasher, AN Type, 5/16”, Plated

Washer, Lock, 5/16”, PlatedNut, Hexagon, 5/16”, Plated

Clamp, Plated“O” Ring

Valve, Pressure ReleaseSwivel AssemblyDecal, DangerDecal, WarningDecal, ChokeDecal, Ignition

Decal, AssistanceDecal, Danger

Decal, (General)Muffler (Modified)

Guard, Muffler (Modified)Screw, Panhead, Phillips, 5/16-18 UNC x 3/8”, Plated

Washer, PlasticDecal, CautionDecal, Weight

Rod, Choke LeverBracket, Choke Lever

1111213111111111111111111111111

Replace: GXV160 KITUsed for converting a GXV140 Honda equipped M330H Digger to a GXV160 Honda engine.(Includeds reference numbers above: 1,2,3,6,7,9,11,12,14,15,26,27)


Transmission Assembly330H, 343H, & 357H Hole Diggers




Transmission Assembly330H, 343H, & 357H Hole Diggers



ReferenceNumber


12345678910111213141516171819202122232425

26

27

28293031

3233

310-0121-A310-010151040800

3516200682

1805000016050000

AN-960-516L7034

61916000117160000345-0310345-0350

6203-2RS-1208125/08231B-AV

08125082312121

47182015053600

15AP-21-S

345-0332-020330H-0330-A

343H-0330

357H-0330

5010080050100801

660442021

37050300330H-0200

Case, Transmission (Includes P/N 6203-2RS-12 and 08231)Gasket, TransmissionPin, Dowel, 1/4” x 1

Drum And Pinion Assembly, ClutchWasher, Fiber

Nut, Hex, 5/16” UNC, PlatedWasher, Lock, 5/16”, Plated

Washer, AN Type, 5/16”, PlatedGear, Primary

Key, Woodruff, 5/32” x 5/8”, AlloyNut, Hex, 1”-14 UNF, Self-Locking

Washer, Flat, 1”, Plain FinishGear, Pinion

Gear, SecondaryBearing, BallRing, Nilos®

Cone, BearingCup, Bearing

Pin, Auger, General and Stihl (Includes P/N AP-21-S)Seal, Oil

Screw, Cap, 5/16” x 4 1/2” UNC, Grade 5, PlatedKey, Woodruff, 1/4” x 1”, Alloy

Pin, SafetyBushing

Shaft, Drive, 1 3/8” Hexagon, 6 Sided(Includes P/N 345-0332-020)

Shaft, Drive, 7/8” Square, Ground Hog Type(P/N 345-0332-020 Not Required)

Shaft, Drive, Stihl Type Drive(P/N 345-0332-020 Not Required)

Plug, Oil Drain (Includes P/N 66044)Plug, Oil Level (Includes P/N 66044)

Gasket, Oil PlugPin, Auger, Ground Hog Type, 7/8” Square

(Includes P/N AP-21-S)Screw, Panhead, Phillips, 5/16-18 UNC x 3/8”, Plated

Washer, Plastic

11211

101010111111212211

10111

1

1

11121

11


Replacement Parts Diagrams4400 Series Earth Augers

1-3/8” Hexagon Drive ConnectionFor Use With 330 Series Hole Diggers



1-3/8” Hexagon Drive ConnectionFor Use With 330 Series Hole Digger

ReferenceNumber

PARTNUMBER DESCRIPTION APPLICATION QUANTITY

1234

5

6

7

8

9

10

11

1505120018050000233-5092

DP-2

DP-3

2121

AP-21-S

20052000

20051600

SB35SB45

SB25

RL

Screw, Cap, 5/16” x 1 1/2” UNC, PlatedNut, Hex, 5/16” UNC, Plated

Decal, DangerPin, Drive

Pin, Drive

Pin, Auger (Includes P/N AP-21-S)

Pin, Safety

Pin, Roll, 5/16” x 2-1/2”, Plain Finish

Pin, Roll, 5/16” x 2”, Plain Finish

Bit, ScrewBit, Screw

Bit, Screw

Lock, Rubber

All AugersAll AugersAll Augers

4400-2E3 Auger5500-2X3 Extension

4400-3E3 Auger4410-4E3 Auger

5500-3X3 Extension5510-4X3 Extension

4400-4E3 thru 4400-18PAugers

5500-15X Extension5500-4E3 thru 5500-12E3

Extensions4400-4E3 thru 4400-18P

Augers5500-15X Extension

5500-4E3 thru 5500-12E3Extensions


5500-12X3 Extension4400-4E3 thru 4400-10E3

Augers5500-4X3 thru 5500-10X3

Extensions5500-15X Extension

4400-3E3 Auger4400-4E3 and 4410-4E3

Augers4400-2E3 Auger



111111111

11

1

11

1

11

1

111

11

1

As Req



1-3/8” Hexagon Drive ConnectionFor Use With 330 Series Hole Diggers

ReferenceNumber

PARTNUMBER DESCRIPTION APPLICATION QUANTITY

1213

14

15

140S141M

140CS

6CS

8CS12CS

Lug, Drive (Weld On)Lug, Drive (Weld On)

Lug, Drive (Weld On)

Shank, 6” (Weld On)

Shank, 8” (Weld On)Shank, 12” (Weld On)

4400-2E3 Auger4400-3E3 Auger

4400-4E3 and 4410-4E3Augers


4400-6E3 Auger4400-16E3 and 4400-18P

Augers4400-8E3 Auger

4400-10E3 and 4400-12E3Augers

4400-16E3 and 4400-18PAugers

11

1

11

11

1

2


Left Blank Intentionally


Replacement Parts DiagramsPSD Series Earth Augers

7/8” Square (Ground Hog) Drive ConnectionFor Use With 343 Series Hole Diggers


Replacement Parts DiagramsPSD Series Earth Augers

7/8” Square (Ground Hog) Drive ConnectionFor Use With 343 Series Hole Diggers

ReferenceNumber

PARTNUMBER DESCRIPTION APPLICATION QUANTIT

Y

1234

5

67

8

910

11

1505120018050000233-5092

2021

AP-21-S

SB45SB25

RL

141M140CS

6CS8CS12CS


Decal, DangerPin, Auger (Includes P/N AP-21-S)

Pin, Safety


Lock, Rubber




All AugersAll AugersAll AugersAll Augers

PSD-15X ExtensionAll Augers

PSD-15X ExtensionPSD4 Auger

PSD6 thru PSD12Augers

PSD6 thru PSD12Augers

PSD4 AugerPSD6 thru PSD12

AugersPSD6 AugerPSD8 Auger

PSD10 and PSD12 Augers

11111111

1

As Req1

1111


Replacement Parts DiagramsBT360 Series Earth Augers

Stihl Type Drive ConnectionFor Use With 357 Series Hole Diggers


Replacement Parts DiagramsBT360 Series Earth Augers

Stihl Type Drive ConnectionFor Use With 357 Series Hole Diggers

ReferenceNumber

PARTNUMBER DESCRIPTION APPLICATION QTY

1234

5

67

8

910

11

1505120018050000233-5092

2121

AP-21-S

SB45SB25

RL

141M140CS

6CS

8CS12CS


Decal, DangerPin, Auger (Includes P/N AP-21-S)

Pin, Safety


Lok, Rubber




All AugersAll AugersAll AugersAll Augers

BT360-15X ExtensionAll Augers

BT360-15X ExtensionBT360-4E Auger

BT360-6E thru BT360-18PAugers

BT360-6E thru BT360-18PAugers

BT360-4E AugerBT360-6E thru BT360-18P

AugersBT360-6E And BT360-18P

AugersBT360-8E Auger

BT360-10E and BT360-12EAugers

BT360-18P Augers

11111111

1

As Req1

1

11

12


REFERENCENUMBER


1 35 Dirt Tooth, Standard As Required

2 35HFC Dirt Tooth, Hard Faced As Required

3 5T30 Tooth, Chisel As Required

4 5T30C Tooth, Chisel, Hard Faced As Required

5 1336 Tooth, Tungsten Carbide As Required

Consult The Service Section Of This Manual For Specific Application Information

Replacement Teeth DiagramsFor Use With

4400, PSD, And BT360 Series Earth Augers


Replacement Parts DiagramDisplay Stand Assembly300 Series Hole Diggers

This drawing represents display stands(including variations) for the 300 Series Hole Diggers


Replacement Parts DiagramDisplay Stand Assembly300 Series Hole Diggers

ReferenceNumber


1

2

345678

999-4-010999-5-010999-4-020999-5-020999-12-020

FP-1641504140043040000

999-4-5010SG24-5070

GECD-5010W

Leg, Stand (210 Hole Digger)Leg, Stand (300 Series Hole Diggers)

Plate, Top (210 Hole Digger)Plate, Top (310, 330, 342 & 343 Hole Diggers)

Plate, Top (356 & 357 Hole Diggers)Cap, Plug, 1” Square

Screw, Cap, 1/4-20 UNC x 1-3/4”, PlatedNut, Wing, 1/4-20 UNC, Plated

Decal, WarningDecal, Assistance

Decal, General

44111488111

CE/Honda GXV160 Operator Manuals

Documents