Compressor

This manual contains important safety information and must becarefully read in its entirety and understood prior to installation byall personnel who install, operate and/or maintain this product.

Manual No. 50263-106

October 2004 Edition

Instruction Manual

QTSQTSQTSQTSQTS®®®®®

IndustrialIndustrialIndustrialIndustrialIndustrial& Air Master Series& Air Master Series& Air Master Series& Air Master Series& Air Master Series

Industrial & Air Master Series Quincy Compressor

50263-106, October 2004 1 3501 Wisman Lane, Quincy IL - 62305-3116

TABLE OF CONTENTSSAFETY ...................................................................1DESCRIPTION & APPLICATION ............................2INSTALLATION .......................................................2SYSTEM COMPONENTS ........................................8PRE-STARTING CHECKLIST ............................... 10STARTING & STOPPING THE COMPRESSOR ...11MAINTENANCE .....................................................12PILOT VALVE ADJUSTMENTS ............................ 15DECAL LOCATIONS .............................................16TROUBLESHOOTING ........................................... 18

SAFETY“DANGER!”, “WARNING!”, and “CAUTION!” aredisplayed in large bold capital letters to call attentionto areas of vital concern. They represent differentdegrees of hazard seriousness, as stated by the fol-lowing:

DANGER !Immediate hazards which will result in severe per-sonal injury or death.

WARNING !Hazards or unsafe practices that could result inpersonal injury or death.

CAUTION !Hazards or unsafe practices which could result inminor personal injury, product or property damage.

WARRANTYQuincy Compressor Reciprocating Products

QTS Air Master Single Stage CompressorsWhat does this warranty cover?Quincy Compressor (the Company) warrants this compressor to be free from defects in materials and workmanship for a period of oneyear from date of purchase. Vacuum pumps used in natural gas applications are warranted for a 90 day service period.

What are the Company's obligations under this warranty?In the event this compressor proves to be defective during the warranty period, the Company will, at its sole option, either repair or replacethis compressor. The Company and its authorized agents may use, at their discretion, reconditioned units when undertaking such repairsor replacement. Repaired or replacement units shall be warranted hereunder for the remainder of the warranty period applicable to theoriginal compressor, or ninety (90) days, whichever is greater.

How do you get service?Contact your local Quincy distributor, or call the Company's Service department at (217) 222-7700, for directions to the nearest authorizedwarranty repair center. In order for you to be eligible to utilize this warranty, Company must have received a completed warrantyregistration card within thirty (30) days of your purchase of this compressor or, at the time service is requested, you must be preparedto provide proof of purchase in the form of a receipt or invoice. All moving, shipping and insurance charges incurred by you to deliverthis compressor to the nearest authorized warranty repair center shall be paid by you and shall be your exclusive responsibility. All riskof loss or damage to your compressor in transit shall remain with you until such time as Company or its authorized agents take receiptof your compressor.

What does this warranty not cover?This warranty is contigent upon proper use of the compressor by purchaser and does not cover:

(A) Abnormal conditions, accident, neglect, misuse or improper storage of the unit.(B) Deviation from operating or maintenance instructions.(C) Modifications not authorized by the Company.(D) Repairs or maintenance (other than routine air tank draining and air filter changes required by your operating and maintenance

manual) made by persons other than Company or its authorized agents.

What are the limits of Company's Liability?The warranty given herein, together with any implied warranties covering this compressor, including warranties of merchantability orfitness for a particular purpose are limited in duration to one year from the date of purchase, and no warranties, whether express orimplied will apply after this period. Some states and provinces do not allow limitations on how long an implied warranty lasts, so theabove limitations may not apply to you.

If this compressor is not in good working order as warranted above, your sole remedy shall be repair or replacement as provided above.In no event will Company be liable to you for any damages, including any lost profits, lost savings or other incidental or consequentialdamages arising out of the use or inability to use such compressor, even if Company or your place of purchase has been advised of thepossibility of such damages.

This warranty gives you specific legal rights and you may also have other rights which vary from state to state or province to province.



nance requirements and the troubleshooting guidefor your compressor. Most warranty issues can beresolved by following proper maintenance proce-dures.

Quincy Compressor neither states as fact, nor inany way implies that the above list of safety pre-cautions is an all inclusive list, the observance ofwhich will prevent all damage to property or injury topersonnel.

Every effort has been taken to ensure that com-plete and correct instructions have been included inthis manual. However, possible product updates andchanges may have occurred since this printing. QuincyCompressor reserves the right to change specifica-tions without incurring any obligation for equipmentpreviously or subsequently sold.

DESCRIPTION& APPLICATIONIndustrial & Air Master QTS Series single stagecompressors and vacuum pumps are air-cooled andsplash lubricated. See appropriate parts manual forrecommended RPM operating range and pressure.The QTS-3VAC & QTS-5VAC vacuum pumps areapproved for sweet dry natural gas applications. It isthe installers responsibility to meet the appropriatecodes and regulations for this type of installation.

INSTALLATIONIndustrial & Air Master Series air compressors shouldbe located in an area that is clean, dry, well lighted,and adequately ventilated. (Note: A gas engine willproduce carbon monoxide; always provide adequateventilation!) The compressor belt guard must not belocated closer than 12 inches to a wall, or 24 inches toanother compressor. Additional safety can be achievedby locating the pulley drive system, with the guard,next to the wall. Do not allow hot air from additionalequipment to blow towards the compressor.

It is recommended that the compressor be oper-ated in temperatures under 104°F and over 32°F. Incold climates, the compressor should be installed ina heated building.

DANGER !Under no circumstances should a compressor beused in an area where toxic, volatile, or corrosiveagents are used or stored near the compressor.

This instruction manual, and any instructionssupplied by manufacturers of supporting equipment,should be read and understood prior to starting thecompressor. If there are any questions, please callyour local Quincy distributor.

Safety Precautions•Relieve the system of all pressure before servicing

any part of the unit.•Allow ample time for the compressor to cool before

performing service procedures. Some surface tem-peratures exceed 350°F when the compressor isoperating.

•Do not remove or paint over any DANGER!,WARNING!, CAUTION!, or instructional mate-rials attached to the compressor.

•Periodically check all pressure relief valves forproper operation.

•Do not change the pressure setting of the pressurerelief valve, restrict the function of the pressurerelief valve, or replace the pressure relief valvewith a plug.

•Do not install a shutoff valve in the compressordischarge line without first installing a pressurerelief valve of proper size and design between theshutoff valve and the compressor.

•Do not make alterations to this compressor.•Do not operate the compressor in excess of its

service rating.•Prior to use, make a general overall inspection of

the unit and correct any unsafe situations. Allfasteners must be kept tight.

•If for any reason any part of the manual becomesillegible or the manual is lost, have it replacedimmediately. The instruction manual should beread periodically to refresh one’s memory.

•Wear safety glasses during operation, service &maintenance procedures.

DANGER !Air used for breathing or food processing mustmeet OSHA 29 CFR 1910.134 or FDA 21 CFR 178.3570regulations. Failure to do so may cause severeinjury or death.

The owner, lessor or operator of any compressorunit manufactured by Quincy Compressor is herebywarned that failure to observe the safety precautionsand procedures outlined in this manual may result inserious personal injury, damage to property, andmay void your warranty. Quincy Compressor mustauthorize all warranty service. Before contactingyour distributor or the factory, check the mainte-



WP 1753A

Fig. 1 Wiring Schematic for 120 VAC Single Phase1 Thru 5 h.p. Portable Units

WP 1753C

Fig. 3 Wiring Schematic for 120 VAC Single Phase1 Thru 5 h.p. Stationary Units

WP 1753A

Fig. 2 Wiring Schematic for 240 VAC Single Phase 1 Thru 5 h.p. Portable Units

WP 1753C

Fig. 4 Wiring Schematic for 240 VAC Single Phase1 Thru 5 h.p. Stationary Units

Fig.s 1 thru 4 are for two cylinder single stage units only



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Extension Cords (portable units)To avoid power loss and overheating of the motor, useof additional air hose is recommended rather than anextension cord. If an extension cord is to be used, itmust be a 3 wire cord with a 3 prong plug. Refer to thefollowing chart to determine the wire gauge requiredin relation to the cord length:

Cord Length Wire Gauge Sizeup to 25 ft. 14-12 ga.up to 100 ft. 10 ga.

CAUTION !QTS compressors should not be operated morethan 10° off level.

Mounting Stationary UnitsProper mounting of Quincy compressor units is cru-cial to the safe operation and longevity of the equip-ment. The installation requires a flat and level con-crete floor or pad (for mobile units see MountingMobile Units). Satisfactory results can usually beobtained by mounting the compressor unit on vibra-tion isolating pads (see Fig.9) available from yourlocal Quincy distributor. All vertical tank unitsmust be anchored!

State or local codes may mandate that the com-pressor be bolted to the floor. In this case the unitmust be leveled and bolted making absolutely certainthe feet are not stressed in any manner. Leave theflange nut loose & lock it with a back-up nut!Uneven feet drawn tightly to the concrete pad willcause severe vibrations resulting in cracked welds orfatigue failure. The customer is responsible for pro-viding a suitable foundation & isolator mountingwhere necessary.

NoiseFederal and local laws govern acceptable noise lev-els; should a question about noise levels arise, checkwith local officials for specifications.

CAUTION !Unusual noise or vibration indicates a problem. Donot operate the compressor until the source hasbeen identified and corrected by a qualified techni-cian.

Electrical InformationThe installation, electric motor, wiring, and all elec-trical controls must be in accordance with NFPANational Electric Code, National Electric Safety Code,state and local codes. Failure to abide by the national,state and local codes may result in physical harmand/or property damage. Note: This unit must begrounded.

Portable Industrial & Air Master Series compres-sors are equipped with an electrical supply cord. Donot modify the cord! If the plug will not fit the outlet,have the correct outlet installed by a certified electri-cian.

Stationary Industrial & Air Master Series (2 & 4cylinder) compressors, not equipped with a powercord, must be wired in accordance with the NEC andall state and local codes and ordinances. (See Figs. 1through 8 for Wiring Schematics.) .

DANGER !High voltage may cause personal injury or death.Disconnect and lockout/tagout per OSHA regula-tion 1910.147 all electrical power supplies beforeopening the electrical enclosure or servicing.

WARNING !Never assume a compressor is safe to work on justbecause it is not operating. It could restart at anytime. Follow all safety precautions outlined in MAIN-TENANCE.

Thermal Overload Protection(if so equipped)Thermal overload protection will stop the unit if themotor becomes overheated. (Causes for overheatingof the motor can be found in TROUBLESHOOTING.)Once the thermal overload protection has beentripped, the motor must cool and the red overloadbutton on the motor must be reset before the unit willstart.

110365

FLANGE NUT

RECEIVER FOOT

ISOLATOR BACKINGPLATE

BOLT

ISOLATOR

FLANGE NUT

Leave loose & lockwith a back-up nut

RECEIVER FOOT

ISOLATOR BACKINGPLATE OR SHIMS IFNECESSARY

ISOLATOR

ANCHOREDFLOORSTUD

UNANCHORED ANCHORED

Fig. 9Isolator Installation

for Unanchored or Anchored Receiver



Mounting Mobile UnitsUnits mounted to truck beds must be fastened insuch a way as not to create any stress to the airreceiver. Truck beds have a tendency to flex andcould cause damage to the receiver if fastened di-rectly to the truck bed. It is the user's responsibilityto provide an adequate means of fastening the unit inthese applications.

SYSTEM COMPONENTSDrive Pulleys / FlywheelsDrive pulleys and compressor flywheels must beproperly aligned and tensioned to specifications. (Re-fer to Belt Alignment & Adjustment.)

WARNING !Excessive compressor RPM’s could cause a pulleyor flywheel to shatter, possibly causing bodily harmor death. Do not operate the compressor above therecommended RPM. (Refer to DESCRIPTION &APPLICATION).

GuardsGuards must be designed and mounted in compli-ance with OSHA safety and health standards 29 CFR1910.219 in OSHA manual 2206, and any state orlocal codes. They must provide protection from mov-ing parts while still allowing full air flow for coolingpurposes.

WARNING !Guards must be fastened in place before startingthe compressor. Always disconnect and lockout thepower supply to the unit before removing the guard.

Check ValvesCheck valves are designed to allow air to flow freelyin one direction only. A properly sized check valvemust be provided. Do not rely on a check valve toisolate a compressor from a pressurized tank or com-pressed air delivery system during maintenance proce-dures.

Pressure RegulatorThis type of valve allows the operator to control theair pressure setting of the compressor discharge. Agauge is provided to indicate the air pressure.

Refer to the adjustment instructions from themanufacturer, included in the envelope shipped withthe compressor unit.

Pressure Relief ValvesPressure relief valves aid in preventing system fail-ures by relieving system pressure when compressedair reaches a predetermined pressure level. All airreceivers must be equipped with an adequately sizedpressure relief valve. This type of valve is preset bythe manufacturer and must not be modified in anyway.

Pressure relief valves are to be placed ahead ofany potential blockage point which includes, but notlimited to, shutoff valves, heat exchangers, pulsationdampeners, and discharge silencers. Ideally the pres-sure relief valve should be threaded directly into thepressure point it is sensing, not connected with tub-ing or pipe, and always pointed away from anychance bystander.

WARNING !Pressure relief valves must be provided to protectcompressed air systems in accordance with ASMEB19 safety standards. Failure to provide properlysized pressure relief valves may cause propertydamage, severe personal injury or even death.

Compressor Controls (Electric MotorPowered Units)Start/StopElectric motor powered units are equipped with apressure switch as standard equipment for start/stopoperation. The pressure switch (when set to the“auto” position) reacts to the demand for compressedair and allows the motor to start. When the demandis satisfied, the unit stops. Pressure switches pro-vided by Quincy Compressor are preset at the factoryand should only be modified by a qualified techni-cian. Pressure switches equipped with an OFF /AUTO contact lever (refer to Fig.13) should be set tothe “OFF” position when connecting or disconnectingthe power cord from the electrical outlet or whenchanging air tools.

This system provides a loadless start feature. Arelease valve on the pressure switch opens when theunit shuts down and bleeds off pressure in the dis-charge line. The check valve holds pressure in thetank.

Compressor Controls (Gasoline EnginePowered Units)Gasoline engine powered units are equipped with apilot unloader valve as standard equipment for con-stant run operation (the engine and compressor con-tinue to run until manually shut off). The pilotunloader valve allows the compressor to run in an



"unloaded" or "loaded" mode. In the "loaded" mode thecompressor delivers compressed air to the tank forstorage until needed. In the "unloaded" mode thecompressor continues to run but the compressed airis immediately vented to atmosphere instead of goingto the tank. Pilot unloader valves are preset at thefactory and should only be modified by a qualifiedtechnician.

When starting an engine powered unit, flip thetoggle on top of the pilot valve to the upright position.This will unload the compressor and allow the engineto start easier. When the engine has run for a fewminutes, flip the toggle back to its original position.

Air IntakeA clean, cool, dry, non-pressurized air supply isessential to the satisfactory operation of your Quincycompressor. A condensate trap must be installed asclose as possible to the inlet filter if, as a result ofinstallation or environmental conditions, there isany risk of moisture forming in the inlet piping.

WARNING !Never locate the compressor where toxic, volatile orcorrosive vapors, air temperatures exceeding 104°F,water, or extremely dirty air could be ingested. Thecompressor could be damaged by these atmo-spheres and result in injury or death.

When using the compressor for spray painting,isolate the compressor as far away from the workarea as practical, employing extra air hose ratherthan an extension cord.

Warranty will be void if a failure is determined tobe caused by dust, dirt or other contaminants.

Compressed Air Discharge SystemAll parts of the discharge piping should fit so as notto create any stress between the piping and connec-tions.

WARNING !Discharge piping can exceed 350°F when compres-sor is operating. Do not use plastic pipe or lead tinsoldered joints for a discharge line.

Pressure VesselsAir receiver tanks and other pressure containingvessels must be equipped with a properly sized pres-sure relief valve, pressure gauge, and a tank drain.

WARNING!Oil and moisture residue must be drained d from theair receiver daily or after each use. Accumulations ofoil residue in the receiver can be ignited by embersof carbon created by the heat of compression, caus-ing an explosion, damage to property and injury topersonnel.

WARNING !Follow ASME code for air receiver tanks and otherpressure containing vessels. Pressure vessels mustnot be modified, welded on, or repaired. Such actionsmay cause property damage, severe injury, or evendeath.

Manual Tank Drain Valve OperationThe manual tank drain valve on portable compres-sors and some stationary compressors is located onthe underside of the air tank. Portable compressorscan be tilted in the direction of the drain to allowremoval of tank moisture.

Some tanks use an internal drain tube (see Fig. 10)to drain the moisture. Tank pressure is required toforce moisture out of the tank through the drain tube.

Safe removal of tank moisture from either type oftank is dependent upon an internal tank pressure of20 to 30 PSIG. Higher tank pressures are dangerousand could cause serious injury!

WARNING!Do not open a manual tank drain valve on any air tankcontaining more than 30 PSIG of air pressure!

WARNING!Never attempt to relieve an air tank by removing a pipeplug or any other system component!

Pix 1224Fig. 10 Internal Drain Tube

30 PSIG



Manually Draining An Air Tank:

Tank(s) subjected to freezing temperatures may con-tain ice. Store the compressor in a heated area beforeattempting to drain moisture from the tank(s).

Step 1)Disconnect and lockout the compressor fromthe power source (electric models) or discon-nect the spark plug wire from the spark plug(gas engine models).

Step 2)Reduce the air pressure in the tank to 30PSIG by pulling the pressure relief valve ring(see Fig. 11).

Step 3)Position yourself so that the moisture and airto be expelled can not cause you harm.

Step 4)Open the drain valve and allow the moistureand air mixture to drain from the tank.

Step 5)Once the moisture has been completelydrained, close the drain valve.

PRE-STARTINGCHECKLIST

WARNING !Failure to perform the PRE-STARTING CHECKLISTmay result in mechanical failure, property damage,serious injury or even death.

Steps 1 through 5 should be performed prior tooperating the unit. If any condition of the checklist isnot satisfied, make the necessary adjustments orcorrections before starting the compressor.

For gas engine start-up procedures, refer to thegas engine owner’s manual.

WARNING !Never assume a compressor is safe to work on justbecause it is not operating. It could restart at any time.Follow all safety precautions outlined in MAINTE-NANCE.

Step 1)Basic compressors are shipped without lubri-cant in the crankcase. Add lubricant perspecifications. (Refer to Lubrication).

Tank mounted units are shipped with break-in lubricant in the crankcase. Check for properlubricant level. (Refer to Lubrication.)

Step 2)Make sure all pressure relief valves are cor-rectly installed. (Refer to SYSTEM COMPO-NENTS)

Step 3)Be sure all guards are in place and securelymounted. (Refer to SYSTEM COMPONENTS)

Step 4)On electric motor driven units, check fuses,circuit breakers, and thermal overloads forproper sizes.

Step 5)Open the tank drain valve in the bottom ofthe tank.

STARTING & STOPPINGTHE COMPRESSORConstant Run ModelsStep 1)Flip the toggle on the pilot valve to the

“MANUAL UNLOAD” position (see Fig. 12).

Step 2)Start the compressor by plugging the powercord into a properly grounded and rated powersource (electric models) or by starting the gasengine (refer to gas engine owner’s manualfor start-up procedures).

Step 3)Allow the compressor to run for a few min-utes.

Step 4)Flip the toggle on the pilot valve to the “RUN”

Fig. 11 Checking Pressure Relief Valves& Relieving System Pressure

Pix 1160

Fig. 12 Constant Run Starting

Toggle in"MANUAL UNLOAD"

Position

Toggle in"RUN"

Position



valve stating that the compressor is beingserviced.

Step 2)Completely relieve the system of air pressureby pulling the ring on a pressure relief valve.Continue to pull the ring until all air pres-sure escapes. (Refer to Fig. 11)

Step 3)Open all manual drain valves within the areato be serviced.

Step 4)Wait for the unit to cool before starting toservice.

Maintenance ScheduleRefer to the gas engine owner’s manual for mainte-nance procedures to be performed on the engine. Ifthe unit is used in an excessively dirty or dustyenvironment, check and perform all maintenanceprocedures more often.

After First 100 Hours or First Month of Operation(whichever occurs first)

• Replace break-in lubricant with Quin-Cip (Referto LUBRICATION).

Daily• Maintain lubricant level between high and low

level marks on bayonet gauge. Discolored lubri-cant or a higher lubricant level reading mayindicate the presence of condensed liquids. (Referto TROUBLESHOOTING.)

• Drain the air tank, drop legs and moisture trapsin air distribution system. Tank(s) subjected tofreezing temperatures may contain ice. Store thecompressor in a heated area before attempting todrain moisture from the tank(s). Never attempt todrain these components without first relievingthe system pressure.

• Give compressor overall visual inspection and besure safety guards are in place.

• Check for any unusual noise or vibration.

Weekly• Pull on the ring of the pressure relief valves to

make sure they are operating correctly. Air pres-sure should escape when the ring is pulled. (Re-fer to Fig. 11.)

• Check all pressurized components for rust, crack-ing or leaking. Immediately discontinue use ofthe equipment and relieve all system pressure ifany of these problems are discovered. Do not usethe equipment until it has been inspected andrepaired by a qualified mechanic.

• Clean the exterior surfaces of the compressor.• Check the air filter and replace if necessary.

position. The compressor will start to delivercompressed air to the tank.

Step 5)Watch and listen for excessive vibration andunusal noises. If either exist, stop the com-pressor and refer to TROUBLESHOOT-ING.

Step 6)New compressors should be run with ap-proximately 80 PSI of air pressure in thetank for 1 hour to break-in (use tank drain orregulator to control tank pressure). This willallow the compressor time to warm up andseat the rings.

Step 7)To stop the compressor, flip the toggle on thepilot valve to the “MANUAL UNLOAD” posi-tion and carefully unplug the power cord fromthe power source or shut the engine off.

Start / Stop and Dual Control ModelsStep 1)Flip the contact lever on the side of the

pressure switch to the “OFF” position (seeFig. 13).

Step 2)Plug the power cord into a properly groundedand rated power source.

Step 3)Start the compressor by flipping the contactlever on the side of the pressure switch to the“AUTO” position.

Step 4)At initial start-up, verify that the compressorflywheel is rotating counterclockwise (asviewed from the flywheel side of compres-sor). Watch and listen for excessive vibrationand unusal noise. If either exist, stop thecompressor and refer to TROUBLESHOOT-ING.

Step 5)New compressors should be run with thetank drain valve open for 1 hour to break-inthe compressor. This will allow the compres-sor time to warm up and seat the rings.

Step 6)To stop the compressor, flip the contact leveron the side of the pressure switch to the“OFF” position. Carefully unplug the powercord from the power source.

MAINTENANCEThe following procedures should be performed whenstopping the compressor for maintenance or service:

Step 1)Per OSHA regulation 1910.147, disconnectand lockout/tagout the main power source.Then, isolate the compressed air supply byclosing and locking out a manual shutoffvalve upstream and downstream from thecompressor. Display a sign in clear view atthe main power source and at the shutoff



3 lbs. of pressure will deflectbelt about 1/4" (6 mm.)

Pix 1161Fig. 15 Typical Belt Adjustment

Pix 1162QTS belt alignment

edge of straightedgeshould touch outer rim

of flywheel at two places;belt should run parallel to straightedge

View From Top of Compressor Unit

Fig. 14 Typical Belt Alignment Pix 1162

• Check system for air &/or lubricant leaks.

Monthly• Check belt tension.• Check flywheel retaining screws.

Every 6 Months (or every 500* hrs.)• Change lubricant.*Intervals may be extended to 1000 hrs. when Quin-

Cip lubricant is used. (Change more frequently inharsher conditions.)

LubricationBefore starting this compressor, check the lubricantlevel. It should register between the high and lowlevel marks on the dipstick. Remove the dipstick toadd lubricant to the crankcase. Do not overfill.

Approximate Crankcase Lubricant CapacityQTS-1 = 6.7 oz. (200 ml.) of Quin-Cip®

QTS-3 = 12 oz. (354 ml.) of Quin-Cip®

QTS-5 = 39 oz. (1150 ml.) of Quin-Cip®

Quin-Cip lubricant has proven under extensivetesting to minimize friction and wear, limit lubricantcarryover, and reduce carbon and varnish deposits.It will support the performance characteristics andlife designed into all Quincy compressors and ishighly recommended. Quin-Cip is available fromyour local Quincy distributor in several containersizes. Refer to the parts manual for part numbers.

A non-detergent SAE 10W, SAE 20W or SAE 30weight lubricant may be used in your compressor.Refer to the chart below to determine which viscosityto use for your application.

Ambient Temperature SAE Viscosity0-32°F SAE 10W

32-80° F SAE 20W60-104°F SAE 30

Detergent lubricants are not recommended be-cause they have a tendency to foam when used incompressors.

CondensationRust can form inside the crankcase and on internalcomponents as a result of condensation. A compres-sor must operate long enough during each run cycleto reach full operating temperature in order to re-duce the risk of condensation.

CAUTION!Lubricant that appears milky on the dipstick mayhave mixed with condensate. Failure to replacecontaminated lubricant will result in damage to thecompressor and may void warranty.

Condensation can also form in the air tank of yourcompressor. When this happens, a mixture of air andmoisture will be expelled through the service valveand into whatever is connected to the valve (e.g. airhoses, metal air lines, pneumatic tools, spray guns).An in-line filter or dryer, available from your localQuincy distributor, may be required to eliminate themoisture.

Condensation in the air tank can be kept to aminimum by draining the tank on a daily basis. Thisalso reduces the risk of rust developing and weak-ening the tank.

Belt Alignment & AdjustmentDrive belts tend to stretch with normal use andrequire adjustment periodically (check monthly). Inorder to adjust the drive belt the belt guard must beremoved. Prior to removing the belt guard, follow theprocedures outlined under MAINTENANCE.

Check the belt alignment by placing a straight-edge against the face of the flywheel, touching its rimat two places (refer to Fig. 14). Adjust the flywheel ormotor pulley so that the belt runs parallel to thestraightedge. Use a wheel puller to move the motorpulley on the shaft.



Properly adjusted, a 3 pound pressure applied tothe belt between the motor pulley and the compres-sor flywheel will deflect the belt about 1/4”(6mm.).Refer to Fig. 15. To adjust the belt tension, loosen the4 motor mounting screws and slide the motor in theproper direction. Retighten the motor mountingscrews.



PILOT VALVE ADJUSTMENTSAll adjustments made to the pilot valve must be performed by a qualified technician. The adjustments mustbe made while the unit is operating, therefore, extreme caution must be taken while working on the unit.Observe all necessary precautions. Always use a back-up wrench and make all differential and unload pressureadjustments in very small increments (1/8 turn).

WARNING !The pressure switch and / or pilot valve are set at the factory for maximum efficiency. Adjustments to eithercomponent must be performed by a qualified technician. Exceeding the factory recommended maximum pressurewill void the warranty and may cause personal injury.

Step 3. Turn clockwise to increase unload pres-sure, turn counterclockwise to decreaseunload pressure. Hold position with wrenchand proceed to Step 4.

Step 4. Tighten locknut (clockwise) with wrench. *Stabilize with back-up wrench!

*

Step 1. Flip the toggle to the"RUN" position asshown, or turn theknurled knob (if soequipped) counter-clockwise until itstops.

Setting Unload Pressure

Step 2. Loosen locknut (coun-terclockwise). * Sta-bilize with back-upwrench!

*

Setting Differential Pressure

Step 5. Loosen locknut (counterclockwise). *Stabilize with back-up wrench!

Step 6. Turn clockwise to decrease thedifferential pressure and coun-terclockwise to increase the dif-ferential pressure. Hold positionwith wrench and proceed to Step7.

Step 7. Tighten locknut (clockwise) withwrench. * Stabilize with back-up wrench!

"MANUALUNLOAD"

position(Ref.)



DECAL LOCATIONS



TYPICAL DECAL LOCATIONS FORVERTICAL UNITS

(model QT-5 vertical unit shown)



TROUBLESHOOTINGRead and understand all the safety precautions listed in the front of this manual and follow all procedures listedin MAINTENANCE before making repairs. Refer to the gas engine owner’s manual for troubleshooting a gasengine.

PROBLEM CAUSES CORRECTION

1. Motor hums or runs slowlywhen first turned on, butcompressor does not start.Motor then stops humming.-Fuses blow-Circuit breakers trip-Motor thermal overload trips

1. Light duty extension cordbeing used.

2. Loose electrical connection.3. Lubricant being used is too

heavy.4. Too many lights or appliances

being operated on the samecircuit as the compressor(circuit overloaded).

5. Defective check valve orunloader.

6. Low voltage.7. Freezing temperature.8. Motor sized incorrectly.9. Drive belt too tight.10. Incorrect size fuse or circuit

breaker.11. Defective motor.12. Lack of proper ventilation -

room temperature too high.13. Motor voltage does not match

voltage of power source.

1. Use additional hose instead ofextra extension cord or useheavier gauge extension cord.

2. Repair electrical connections.3. Use a lighter weight lubricant

(refer to Lubrication).4. Try another circuit or remove

other appliances from circuitbeing used.

5. Replace check valve orunloader.

6. Check with voltmeter.7. Warm the compressor or use a

lighter weight lubricant (referto Lubrication).

8. Replace with correctly sizedmotor.

9. Readjust belt (refer to BeltAlignment & Adjustment).

10. Check for proper size fuse.11. Replace motor.12. Move the compressor to a well

ventilated area.13. Change power cord & voltage

of motor to match voltage ofpower source.

1. Plug power cord in.2. Switch to “auto”.3. Turn auto/off switch to the

“off” position. Push the motorthermal overload (red) buttonfirmly until a click is heard.Turn auto/off switch to “auto”.

4. Replace fuse or reset circuitbreaker.

5. Replace or repair pressureswitch.

6. Replace or repair motor.7. Add lubricant (refer to

Lubrication).8. Adjust belt (refer to Belt

Alignment & Adjustment).9. Change power cord & voltage

of motor to match powersource.

1. Power cord not plugged in.2. Auto/off switch in “off”

position.3. Motor thermal overload

tripped.4. Fuse blown &/or circuit

breaker is tripped.5. Defective pressure switch.6. Defective motor.7. Lack of lubricant in compres-

sor (can cause serious damageto compressor).

8. Belt too tight or too loose.9. Motor voltage does not match

voltage of power source.

2. Compressor won’t operate.




3. Noisy operation. 1. Lack of lubricant in crankcase.2. Loose pulley, flywheel, belt,

compressor or motor fasten-ers, beltguard, clamps oraccessories.

3. Carbon deposits on piston orvalves.

4. Worn main bearings, brokenpiston, worn wrist pins, wristpin bearings, or loose connect-ing rod bolt.

1. Check for possible damage to

bearings. Add lubricant (seeLubrication).

2. Tighten where necessary.3. Remove the cylinder head and

inspect for foreign matter ontop of the piston. Clean.

4. Take to Authorized ServiceCenter.

4. Excessive vibrations.

1. Pulley & flywheel misaligned or loose.2. Bent crankshaft.3. Belt loose.4. Compressor unit bolted to

uneven surface or not bolteddown at all (stationarymodels).

1. Realign or tighten pulley andflywheel.


3. Tighten belt (refer to BeltAlignment & Adjustment).

4. Shim to level surface & fastento floor if possible.

5. Excessive lubricant consump-tion and/or excessive lubricantin hose.

1. Crankcase overfilled withlubricant.

2. Lubricant leaks.3. Worn piston rings.4. Wrong lubricant viscosity.5. Compressor on unlevel

surface.6. Scored cylinder.7. Plugged crankcase breather.

1. Drain lubricant. Refill toproper level with properlubricant (refer to Lubrica-tion).

2. Tighten bolts on compressorto proper torque or replacegaskets.


4. Drain lubricant & refill withproper lubricant (refer toLubrication).

5. Level compressor.6. Take to Authorized Service

Center.7. Clean or replace crankcase

breather.

6. Air blowing from inlet filter. 1. Damaged inlet (reed) valve. 1. Take to Authorized ServiceCenter.

7. Crankcase lubricant is milky. 1. Water in lubricant due tohumidity or condensation.

1. Change lubricant. Movecompressor or air inlet to lesshumid atmosphere.

8. Compressor runs backwards. 1. Reversed wiring polarity. 1. Contact qualified electrician.




9. Insufficient pressure at tool oraccessory.

1. Leaks or restrictions.2. Restricted air intake (filter

plugged).3. Slipping belt.4. Hose or hose connectors too

small.5. Compressor incorrectly sized.6. Regulator not turned up to

high enough pressure / faultyregulator.

1. Check for leaks or restrictionsin hose or piping. Repair.

2. Clean or replace filter.3. Tighten belt (refer to Belt

Alignment & Adjustment).4. Replace with larger hose or

connectors.5. Either use a smaller tool or a

larger compressor.6. Turn the regulator to the

proper setting / replace faultyregulator.

10. Tank loses pressure rapidlywhen compressor shuts off.

1. Loose connection or leak (pipe,tank drain valve, tubing,fitting or hose).

2. Faulty check valve.

1. Turn unit off, unplug it, &tighten or replace fittings orcomponents.

2. Replace faulty check valve.

11. Moisture in discharge air. 1. Condensation in tank, causedby high level of atmospherichumidity or compressor is notrun long enough.

1. Drain tank after every use.Drain tank more frequently inhumid weather & use an airline filter.

12. "Start / Stop" compressor unitruns continuously.

1. Defective pressure switch.2. Compressor incorrectly sized.

1. Replace defective pressureswitch.

2. Limit the air pressure to thecompressor’s capacity. Eitheruse a smaller tool or a largercompressor.

13. Compressor overheats. 1. High ambient temperature;inadequate ventilation.

2. Dirty cylinder & head coolingfins.

3. Unit is undersized for applica-tion.

4. Insufficient lubrication.5. Compressor runs backwards.6. One or more head valves

failing to seat properly.7. Damaged cylinder head

gasket.8. Restriction in head or check

valve.

1. Increase ventilation withcooler air.

2. Clean all outer surfaces of thecompressor.

3. Re-evaluate applicationrequirements; re-size ifnecessary.

4. Inspect for proper lubricantand amount. Refer to LUBRI-CATION. Do not operatethis compressor more than10° off level.

5. Take to authorized servicecenter.



8. Inspect, clean or replace.



QUINCY COMPRESSOR AND ORTMAN FLUID POWER DIVISIONS

STANDARD TERMS AND CONDITIONS

LEGAL EFFECT: Except as expressly otherwise agreed to in writing by an authorized representative of Seller,the following terms and conditions shall apply to and form a part of this order and any additional and/ordifferent terms of Buyer’s purchase order or other form of acceptance are rejected in advance and shall notbecome a part of this order.

The rights of Buyer hereunder shall be neither assignable nor transferable except with the written consent ofSeller.

This order may not be canceled or altered except with the written consent of Seller and upon terms which willindemnify Seller against all loss occasioned thereby. All additional costs incurred by Seller due to changes indesign or specifications, modification of this order or revision of product must be paid for by Buyer.

In addition to the rights and remedies conferred upon Seller by this order, Seller shall have all rights andremedies conferred at law and in equity and shall not be required to proceed with the performance of thisorder if Buyer is in default in the performance of such order or of any other contract or order with seller.

TERMS OF PAYMENT: Unless otherwise specified in the order acknowledgment, the terms of payment shall benet cash within thirty (30) days after shipment. These terms shall apply to partial as well as complete ship-ments. If any proceeding be initiated by or against Buyer under any bankruptcy or insolvency law, or in thejudgment of Seller the financial condition of Buyer, at the time the equipment is ready for shipment, does notjustify the terms of payment specified, Seller reserves the right to require full payment in cash prior to makingshipment. If such payment is not received within fifteen (15) days after notification of readiness for shipment,Seller may cancel the order as to any unshipped item and require payment of its reasonable cancellationcharges.

If Buyer delays shipment, payments based on date of shipment shall become due as of the date when ready forshipment. If Buyer delays completion of manufacture, Seller may elect to require payment according topercentage of completion. Equipment held for Buyer shall be at Buyer’s risk and storage charges may beapplied at the discretion of Seller.

Accounts past due shall bare interest at the highest rate lawful to contract for but if there is no limit set by law,such interest shall be eighteen percent (18%). Buyer shall pay all cost and expenses, including reasonableattorney’s fees, incurred in collecting the same, and no claim, except claims within Seller’s warranty ofmaterial or workmanship, as stated below, will be recognized unless delivered in writing to Seller within thirty(30) days after date of shipment.

TAXES: All prices exclude present and future sales, use, occupation, license, excise, and other taxes inrespect of manufacture, sales or delivery, all of which shall be paid by Buyer unless included in the purchaseprice at the proper rate or a proper exemption certificate is furnished.

ACCEPTANCE: All offers to purchase, quotations and contracts of sales are subject to final acceptance by anauthorized representative at Seller’s plant.

DELIVERY: Except as otherwise specified in this quotation, delivery will be F. O. B. point of shipment. In theabsence of exact shipping instruction, Seller will use its discretion regarding best means of insured shipment.No liability will be accepted by Seller for so doing. All transportation charges are at Buyer’s expense. Time ofdelivery is an estimate only and is based upon the receipt of all information and necessary approvals. Theshipping schedule shall not be construed to limit seller in making commitments for materials or in fabricatingarticles under this order in accordance with Seller’s normal and reasonable production schedules.

Seller shall in no event be liable for delays caused by fires, acts of God, strikes, labor difficulties, acts ofgovernmental or military authorities, delays in transportation or procuring materials, or causes of any kindbeyond Seller’s control. No provision for liquidated damages for any cause shall apply under this order.Buyer shall accept delivery within thirty (30) days after receipt of notification of readiness for shipment.Claims for shortages will be deemed to have been waived if not made in writing within ten (10) days after thereceipt of the material in respect of which any such shortage is claimed. Seller is not responsible for loss ordamage in transit after having received “In Good Order” receipt from the carrier. All claims for loss or damagein transit should be made to the carrier.



TITLE & LIEN RIGHTS: The equipment shall remain personal property, regardless of how affixed to any realtyor structure. Until the price (including any notes given therefore) of the equipment has been fully paid in cash,Seller shall, in the event of Buyer’s default, have the right to repossess such equipment.

PATENT INFRINGMENT: If properly notified and given an opportunity to do so with friendly assistance, Sellerwill defend Buyer and the ultimate user of the equipment from any actual or alleged infringement of anypublished United States patent by the equipment or any part thereof furnished pursuant hereto (other thanparts of special design, construction, or manufacture specified by and originating with Buyer), and will pay alldamages and costs awarded by competent court in any suit thus defended or of which it may have had noticeand opportunity to defend as aforesaid.

STANDARD WARRANTY: Seller warrants that products of its own manufacture will be free from defects inworkmanship and materials under normal use and service for the period specified in the product instructionmanual. Warranty for service parts will be ninety (90) days from date of factory shipment. Electric Motors,gasoline and diesel engines, electrical apparatus and all other accessories, components and parts not manu-factured by Seller are warranted only to the extent of the original manufacturer’s warranty.

Notice of the alleged defect must be given to the Seller, in writing with all identifying details including serialnumber, type of equipment and date of purchase within thirty (30) days of the discovery of the same during thewarranty period.

Seller’s sole obligation on this warranty shall be, at its option, to repair or replace or refund the purchase priceof any product or part thereof which proves to be defective. If requested by Seller, such product or partthereof must be promptly returned to seller, freight prepaid, for inspection.

Seller warrants repaired or replaced parts of its own manufacture against defects in materials and workman-ship under normal use and service for ninety (90) days or for the remainder of the warranty on the productbeing repaired.

This warranty shall not apply and Seller shall not be responsible or liable for:

(a) Consequential, collateral or special losses or damages;

(b) Equipment conditions caused by fair wear and tear, abnormal conditions of use, accident, neglect ormisuse of equipment, improper storage or damage resulting during shipping;

(c) Deviation from operating instructions, specifications or other special terms of sale;

(d) Labor charges, loss or damage resulting from improper operation, maintenance or repairs made byperson(s) other than Seller or Seller’s authorized service station.

In no event shall Seller be liable for any claims whether arising from breach of contract or warranty or claimsof negligence or negligent manufacture in excess of the purchase price.

THIS WARRANTY IS THE SOLE WARRANTY OF SELLERS AND ANY OTHER WARRANTIES, WHETHER EX-PRESS OR IMPLIED IN LAW OR IMPLIED IN FACT, INCLUDING ANY WARRANTIES OF MERCHANTABILITYAND FITNESS FOR PARTICULAR USE ARE HEREBY SPECIFICALLY EXCLUDED.

LIABILITY LIMITATIONS: Under no circumstances shall the Seller have any liability for liquidated damages orfor collateral, consequential or special damages or for loss of profits, or for actual losses or for loss ofproduction or progress of construction, whether resulting from delays in delivery or performance, breach ofwarranty, negligent manufacture or otherwise.

ENVIROMENTAL AND OSHA REQUIREMENTS: At the time of shipment of the equipment from the factory,Quincy Compressor / Ortman Fluid Power will comply with the various Federal, State and local laws andregulations concerning occupational health and safety and pollution. However, in the installation and opera-tion of the equipment and other matters over which the seller has no control, the Seller assumes no responsi-bility for compliance with those laws and regulations, whether by the way of indemnity, warranty or otherwise.

June 30, 2003

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ReciprReciprReciprReciprReciprocating / Systems:ocating / Systems:ocating / Systems:ocating / Systems:ocating / Systems: 217.222.7700

Air MasterAir MasterAir MasterAir MasterAir Master 217.277.0270

E-mail:E-mail:E-mail:E-mail:E-mail: [email protected]

WWWWWebsite:ebsite:ebsite:ebsite:ebsite: quincycompressor.com

quincyairmaster.com

© 2006 Quincy Compressor, an EnPro Industries company

All Rights Reserved. Litho in U.S.A.

Compressor

Documents

thermal overload protection

air master series

pressure relief valves

lighter weight lubricant

low level marks

main power source

authorized service center

pressure relief valve