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Trailer Suspensions Owner’s Manual
Reyco Granning Suspensions1205 Industrial Park DriveMount Vernon, MO 65712 Phone: 417-466-2178 Fax: 417-466-3964
COMPANY PROFILEReyco Granning Suspensions was formed by the merger and acquisition of two well-known names in the heavy-duty vehicle suspension industry: Reyco and Granning.
Reyco grew out of the Reynolds Mfg. Co. and was first known as a major supplierof brake drums for heavy-duty vehicles, and later developed a full line of air andsteel spring suspensions for trucks, busses, trailers, and motorhomes.
Granning Air Suspensions was founded in 1949 in Detroit, Michigan as a manufacturer of auxiliary lift axle suspensions. Granning later became an innovator of independent front air suspensions for the motorhome industry.
Reyco Granning LLC was formed in early 2011 through a partnering of senior managers and MAT Capital, a private investment group headquartered in Long Grove, Illinois.
Reyco Granning manufacturing facilities are certified to the ISO9001:2008 standards, a globally recognized assurance that quality standards have been established and are maintained by regular rigorous audits.
Installation Instructions 86AR Slider Series
On Highway Suspension System
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SAFETY PROCEDURES & INFORMATION i.11.iTSRIF YTEFAS1.iYTEFAS ROTAREPO1.ignitfiL
SUSPENSION ALIGNMENT i.1001.itnemngilA ecivreS nI & laniF
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Installation Instructions Model 86AR Slider Series
i.1 On Highway Suspension System
SAFETY FIRST Be sure to read and follow all installation andmaintenance procedures.
LIFTINGPractice safe lifting procedures. Consider size,shape and weight of assemblies. Obtain help orthe assistance of a crane when lifting heavyassemblies. Make sure the path of travel is clear.
PARTS HANDLINGWhen handling parts, wear appropriate gloves,eyeglasses and other safety equipment to preventserious injury.
WELDINGWhen welding, be sure to wear all personalprotective equipment for face and eyes; and be surethe work area is adequately ventilated. When welding, protect spring beams and air springs fromweld spatter and grinder sparks. Do not attach“ground” connection to springs.
Under normal use, steel presents few healthhazards. Prolonged or repeated breathing of ironoxide fumes produced during welding may causesiderosis.
Welding Helmet
Welding Apron
Welding Gloves
Bolts and hardware are U.S. standard. For identificationpurposes only, the following chart is a conversion of common hardware and dimensions to metric:
INCH MM
7/32 (.22) 5.59
3/8 (.375) 9.53
INCH MM
1/4 (.25) 6.35
1/2 (.5) 12.7
INCH MM
5/8 (.625) 15.88
7/8 (.875) 22.23
INCH MM
3/4 (.75) 19.05
1 (1.0) 25.40
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Installation Instructions 86AR Slider Series
i.2On Highway Suspension System
OVERLOADINGOverloading is the practice of transporting cargosthat surpass the specified vehicle’s ratings.Overloading can cause component failureresulting in accidents and injuries.
TORQUEProper tightening of the U-bolt nuts and alignmentbolts are high priority items. A fastener system isconsidered “loose” any time the torque is foundbelow required values. Failure to maintain thespecified torque and to replace worn parts cancause component failure resulting in accident withconsequent injury.
NOTE: It is extremely important after thefirst 1,000 to 3,000 loaded miles (1,600 -4,800 kms) of operation, and with eachannual inspection thereafter, that all of thebolt and nut tightening recommendationsbe followed. Any loose fasteners must beretorqued to comply with warrantyrequirements and to ensure long, trouble-free performance.
DOCK OPERATIONSSome air ride suspensions do have an operationalcharacteristic called “Trailer Walk” because of theirgeometry. The trailer actually can walk away fromthe dock in very small steps as the cargo is loadedor unloaded.
The 86AR Slider Series was designed to have aminimum of trailer walk; however, it can occur. Iftrailer walk is a problem, the addition of dumpvalves to exhaust the air should be considered onModels RS1015 and RS3015.
Models RS1035 and RS3035 were designed toeliminate trailer walk entirely and were alsodesigned to eliminate the need for dumping of airto the air ride system. Dump valves are notallowed on Models RS1035 and RS3035.
NOTE: Proper use of dock plates, wheelchocks and rearmost placement of the sliderwill minimize trailer walk.
This symbol indicates to the reader to use cautionwhen seen and to follow specific requirements orwarnings stated.
WARNINGWARNING
Torque Wrench
CAUTION: Specific torque requirementsare recommended.
Axl
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i.3 On Highway Suspension System
BRAKE CAMSHAFT LOCATIONThis section explains the procedures required tocomplete the steps of installing the axles. Installationsteps may vary in sequence to fit the O.E.M.’spreference but the basic steps are presentedherein.
RS1015 / RS3015BOTH AXLES: Brake camshafts are to be to the rearof the axles and chambers underneath the axle. Ifcamshafts are located differently, assembler mustcheck for adequate clearances.
NOTE: The Model RS3015 is supplied with brakecamshafts installed in proper position.
RS1035 / RS3035On suspension models RS1035 and RS3035 equipped with 2S1M ABS, the sensors must be installed on the front axle.
FRONT AXLEBrake camshafts are to be to the rear of the axlesand chambers underneath the axle. If camshafts arelocated differently, assembler must check foradequate clearances.
REAR AXLEThe brake camshaft must be to the front with theslack adjusters pointing up and the chambers on topof the axle. A long camshaft is required.
NOTE: The Model RS3035 is supplied with brakecamshafts installed in proper position.
.
Front and Rear AxlesCam and Canister Location
Front Axles Cam and Canister Location
Rear Axles Cam and Canister Location
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Installation Instructions 86AR Slider Series
i.4On Highway Suspension System
AXLE SEAT INSTALLATION Locate and mark the upper camber line (top center)of the axles. Position the spring seats on the axle sothat the brake camshafts and chambers are asdescribed in the “Brake Camshaft Location” section.The correct spring center spacing is the same as thetransverse distance between hanger center lines asmounted to the sub-frame. The center line of thespring bolt hole must pass through the axle camberline. Clamp the seats in position and tack weld thefront and rear (not on the axle camber line).
The spring contact surfaces of the axle seats mustbe parallel to each other within 1/2°.
Weld the spring seats to the axle. Weld all aroundexcept for a 3" gap at top of axle.
NOTE: Do not weld 1 1/2" each side of the axlecamber line.
NOTE: Bottom plates need no welding.
ELECTRODE SPECIFICATIONSFour methods may be used to weld componentsper American Welding Society (AWS)specifications:
AWS ELECTRODE SPECIFICATION1. Shielded Metal Arc (stick electrodes) ........E7018
2. Gas Metal Arc (MIG, solid wire) ............ER70S-X
3. Gas Tungsten Arc (TIG) ........................ER70S-X
The weld strength must be at 70,000 psi. Higher orlower strengths are not acceptable. The best fusionand strengths will be obtained using the voltage,current and shielding medium recommended bythe electrode manufacturer. If stick method is used,electrodes must be clean, dry and stored perAWS Section 4.5.2.
Refer to axle manufacturer for additional weldingprocedures.
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i.5 On Highway Suspension System
AXLE SEAT INSTALLATIONAfter installation of the axle seats, position the axlebelow the spring beams. Complete the axleinstallation by assembling the top plate (item 7),bottom plate (item 8), u-bolts (item 9), washers (item11) and lock nuts (item 10). Install spring linerbetween top plate and spring beam while u-bolts aretorqued to 300-325 ft lbs (410-440 Nm). Install therigid torque arms (item 4) on the Curb Side of theslider, and adjustable torque arms (item 5) on theRoad Side and torque 7/8” bolts to 400-425 ft lbs(545-580 Nm).
Specific torque requirements are recommended.
Front Axle
Spring Linertopside of spring
Spring Linertopside of spring
Curb Side Rigid Torque Arm
Rear Axle
8
1
4
Diagrams below refer to model RS1035
Diagrams below refer to model RS1015
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Installation Instructions 86AR Slider Series
i.6On Highway Suspension System
AXLE SEAT INSTALLATION
TORQUING SEQUENCE
NOTE: Bring torque up in 100 ft lbs (135 Nm)steps, in sequence shown, so that there is aneven build-up of torque.
HEIGHT CONTROL VALVEThe height control valve and linkage comes pre-assembled to the slider.
Rear Axle
Front Axle
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veInstallation Instructions 86AR Slider Series
i.7 On Highway Suspension System
HADLEY® HEIGHT CONTROL VALVEHADLEY® HEIGHT CONTROL VALVE 1500:goes on theREAR AXLE of48” RS1015, RS3015, RS1035, & RS3035
goes on theFRONT AXLE of42” RS1035 & RS3035
PLUMBING HEIGHT CONTROL VALVEInstall air tanks, brake valves, air lines and otheritems as needed on the slider frame. ReycoGranningrecommends 3/8" (9.5mm) OD tubing for all airspring lines plumbed as shown.
AXLE
AIR SPRING
AIR TANK
AIR PRESSURE REGULATOR VALVETO MAINTAIN SAFE AIR PRESSURE(LOCATE ON AIR RESERVOIR)
PLUMBING DIAGRAMAir Supply with
Hadley 1500 Height Control Valve
48” RS1035, & RS3035 (optional)
(standard)
Install slider body rails to trailer floor beams asshown above.
Install safety stop tubes as shown.
Normally the trailer manufacturer has a fixture tolocate body rails on the trailer floor.
If fixture is not available, use slider assembly astemporary fixture.
If manual stop bar is used, locate behind sliderthrough both rails.
Installation Instructions Model 86AR Slider Series
i.9 On Highway Suspension System
Retract the slider lock pins. Remove the body railguides (A) temporarily from the slider and positionthe slider and axle assembly under the trailer. Lowerthe trailer into position on the slider aligning lock pinswith body rail holes. Release the slider lock pins intothe holes in the trailer body rails. Reinstall the bodyrail guides. Torque nuts to 50 ft lbs (70 Nm). Attachplumbing and electrical lines as needed.
Attach air supply to the trailer to release the springbrakes. The height control valve will then raise thesuspension to the proper ride height.
Ride height, also referred to as mounting height, isdefined as the dimension from the bottom frame ofthe slider to the centerline of the axle.
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Installation Instructions 86AR Slider Series
i.10On Highway Suspension System
FINAL AND IN-SERVICESUSPENSION ALIGNMENTINSTRUCTIONS Align the front axle to the trailer king pin; and then,align the rear axle to the front axle by turning theadjustable torque arm screws. Be sure that allsuspension parts are free to move during thisprocedure.
NOTE: Left side and right side axlemeasurements should be equal to within +/-1/16". When the axles are aligned, tightenthe adjustable torque arm clamp nuts to125-150 ft. lbs.
The following steps are recommended andnecessary for proper suspension alignment.
1. Lock trailer brakes and pull trailer forward sothat the slider lock pins touch against the rearpart of the holes in the body rails.
2. Release the trailer brake system and pull thetrailer forward an adequate distance whilekeeping the trailer in a straight line to free thesuspension from binding. The ground must belevel and smooth.
3. Align the front axle with the king pin as shown inthe sketch. For best results, the use of axleextensions and a “BAZOOKA” type king pinpost, (or a suitable optical alignment device) arerecommended.
4. Align the rear axle with the front axle.
5. Tighten the adjustable torque arm clamp boltsto 125-150 ft lbs.
6. Move the slider forward and recheck the kingpin alignment.
7. After an initial loaded run-in period ofapproximately 1,000-3,000 miles, the traileralignment should be rechecked and corrected ifnecessary. Additionaly, all fasteners,especially u-bolts, should be retorqued.
CAUTION: Specific torquerequirements are recommended.
CAUTION: Specific torque requirements arerecommended.
AB
CD
A = B +/- 1/8"C = D +/- 1/16"
CAUTION: Specific torque requirements arerecommended.
TO
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SInstallation Instructions 86AR Slider Series
i.11 On Highway Suspension System
The Model 86AR slider suspensions require, by design, a minimum of maintenance. However, suspensions in normal operation requireperiodic checks to assure continued trouble-free performance.
TORQUE REQUIREMENTS (verify with each inspection.)
AXLES m.2828.mAxles with drum brakes28.m Axles with disc brakes
Maintenance Instructions 86AR Slider Series
m.1 On Highway Suspension System
Mai
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Inst
ruct
ions The Model 86AR slider suspensions require, by design, a minimum of maintenance. However, suspensions in normal operation require
periodic checks to assure continued trouble-free performance
RECOMMENDED MAINTENANCE SCHEDULE
TORQUE REQUIREMENTS (Verify with each inspection.)
VISUAL INSPECTION
ft lbs = Foot - Pounds; Nm = Newton - Meters
1. Loose or missing fasteners.
2. Cracks in hangers or axle connection brackets
3. Springs are centered in hangers and equalizers
All torque values are with clean, dry fasteners and should only be verified with quality wrench of known accuracy. Failure to follow theserecommendations could void warranty. Failure to maintain the specified torque values and/or to replace worn parts can cause componentand/or system failure resulting in an accident with consequent injury or death.
1. Pre-service inspection.
2. First service inspection after 1000-3000 mailes (1600-4800 km).
3. PM inspections concurrently with annual DOT “C” inspections.
4. During replacement of any service parts.
5. Upon discovery of any loose components.
1. Tighten 3/4” u-bolt nuts
2. Tighten 7/8” torque arm and track rod nuts
3. Tighten 5/8” torque arm clamp nuts
4. Tighten 1/2” grade 8 track rod bracket/air spring support bolts
5. Tighten 7/8” grade8 air spring support bolts
6. Tighten 3/4” shock absorber nuts
7. Tighten upper 1/2” air spring nuts
8. Tighten lower 3/8” air spring nuts
9. Tighten upper 3/4” air spring nuts
10. Tighten 1/4” air valve and linkage nut
300-325 ft lbs
400-425 ft lbs
125-150 ft lbs
100-125 ft lbs
300-325 ft lbs
175-200 ft lbs
25-30 ft lbs
15-20 ft lbs
25-30 ft lbs
5 ft lbs
(410-440 Nm)
(545-580 Nm)
(170-205 Nm)
(135-165 Nm) if not Huck®-bolted
(410-440 Nm) if not Huck®-bolted
(240-275 Nm)
(35-41 Nm)
(20-28 Nm)
(55-60 Nm)
(7 Nm)
Maintenance Instructions 86AR Slider Series
m.2On Highway Suspension System
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MAINTENANCE KITSThe following item numbers will help when maintaining parts for the model 86AR suspensions.
TK21569 - Lassa Kit w/o shocks and springs - 48”
K702082 - Shocks Absorber Kit (one)
K702154 - Air Spring Kit (one)
K002201 - Torque Arm/Track Rod Bushing Kit (one)
K002202 - Torque Arm/Track Rod Bushing Kit (for tandem)
LOCKPINS WITH “T” POST ATTACHMENT Used on sliders with production dates after
FASTENERSLoose fasteners need immediate attention. Checkcomponents for wear and be sure holes are notworn or egg shaped. When replacing, be surethreads are clean, lubricated and not deformed.Consult the maintenance section for the correcttorque specification and replace any fastener whichis damaged or won’t stay torqued. If bolts need tobe replaced, be sure to use the same grade offastener.
BUSHINGSInspect rubber bushings for large splits, tears andmajor wear. Rubber is attacked by sun, oils andgreases. Replace any bushings which have theabove damage.
Specific torque requirements are recommended. Torque Wrench
Replace when split,worn or when tears
are detected.
New Bushing
LOCKPINS WITH SLOT ATTACHMENT Used on sliders with production date prior to 2-1-2000
SUBJECT: Lower air spring support hindrance at slack adjuster grease zerks
ROUGH RIDECheck the air supply to the air springs. Visuallycheck the air springs for proper ride height. Seepicture at right.
Air Springs; The air springs are equipped withinternal bump stops for safety. However, do notoperate the loaded unit on the bump stops for anyextended period of time except to move the unit toa repair facility.
SHOCKSShocks normally fail due to over extension. Checkthe mounting bolts to be sure no damage to themounts has occurred. Shock replacement must bedone with shocks recommended by the suspensionor shock manufacturer. Shocks which are leakingbadly need to be replaced immediately. A smallamount of seepage, however, is not necessarily asign of a defective shock absorber.
Over InflatedUnder Inflated Properly Inflated
Normal ShockWorn Shock
Over Extended
Worn Mounts
Leaking
IMPORTANT NOTE: Because of continuous design changes within the transportationindustry and the broad spectrum of slack adjuster suppliers, a hinderance (inability) togrease zerk fittings of certain slack adjusters can occur at the lower air spring supportassembly (LASSA). While reare, this condition has occurred randomly over the past fewyears; and, forecasting every possible combination that could result in hindrance togrease the slack adjuster is nearly impossible.
The problem has been solved in all previous occurences by replacing the installed zerkfitting, with one of a different configuration (i.e. 45-degree or 90-degree bend). Theoutboard cam support bushing may also require a 90 degree fitting. Although this is a relitively minor problem when servicing a single trailer, it can be a nuisance to changethe zerk fitting configurations to accomodate greasing four slack adjusters per trailer ina fleet of vehicles.
Reyco Granning advises client to be especially aware of this condition when selecting®
brake components for installation with the 86AR suspension to prevent aggravation andsave time, money and resources.
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Maintenance Instructions Model 86AR Slider Series
m.5 On Highway Suspension System
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Maintenance Instructions Model 86AR Slider Series
m.6On Highway Suspension System
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ITEM PART NUMBER DRAWING NO. TANDEM DESCRIPTION1 *Variable Slider/Hanger Assembly (See pg. M-9)2 19913-01 92129 2 Left Beam3 19914-01 92130 2 Right Beam