750C,850C CrawlerDozer Repair
TM158910AUG04(ENGLISH) Forcompleteserviceinformationalsosee:
750C,850C,750CSeriesII,850C SeriesIICrawlerDozers
TECHNICALMANUAL
750C,850C,CrawlerDozerOperationand Test ................................ TM1588 6068Engine CTM8 6068POWERTECH Engine CTM104 6076Engine CTM42 6081POWERTECH EngineRepair ....... CTM86 UndercarriageAppraisalManual ......... SP326 WorldwideConstruction AndForestryDivision LITHOINU.S.A.
Foreword
Thismanualiswrittenforanexperiencedtechnician. Essentialtoolsrequiredinperformingcertainservice workareidentifiedinthismanualandare recommendedforuse.
Livewithsafety:Readthesafetymessagesinthe introductionofthismanualandthecautionspresented throughoutthetextofthemanual.
Thisisthesafety-alertsymbol.Whenyouseethis symbolonthemachineorinthismanual,bealertto thepotentialforpersonalinjury.
Technicalmanualsaredividedintwoparts:repairand operationandtests.Repairsectionstellhowtorepair thecomponents.Operationandtestssectionshelpyou identifythemajorityofroutineproblemsquickly.
Informationisorganizedingroupsforthevarious componentsrequiringserviceinstruction.Atthe beginningofeachgrouparesummarylistingsofall applicableessentialtools,serviceequipmentandtools, othermaterialsneededtodothejob,servicepartskits, specifications,weartolerances,andtorquevalues.
TechnicalManualsareconciseguidesforspecific machines.Theyareon-the-jobguidescontainingonly thevitalinformationneededfordiagnosis,analysis, testing,andrepair.
Fundamentalserviceinformationisavailablefrom othersourcescoveringbasictheoryofoperation, fundamentalsoftroubleshooting,generalmaintenance, andbasictypeofproblemsandtheircauses.
Introduction TX,750C,SS2406–19–13JUL95–1/1
TM1589(10AUG04)750C,850C,750CII,850CIICrawler 081004 PN=2
Group0505—ColdWeatherStartingAid Group0510—CoolingSystem
SECTION32—Bulldozer Group0515—SpeedControls Group3200—RemovalandInstallation Group0520—IntakeSystem Group3201—Blade Group0530—ExternalExhaustSystems Group3215—ControlsLinkage Group0560—ExternalFuelSupplySystems
Group0599—DealerFabricatedTools
SECTION07—DampenerDrive Group0752—Elements
SECTION11—ParkBrake Group1100—ParkBrake Group1115—ControlLinkage Group1160—HydraulicSystem
SECTION15—EquipmentAttaching Group1511—Drawbar
Allinformation,illustrationsandspecificationsinthismanualarebasedon thelatestinformationavailableatthetimeofpublication.Therightis reservedtomakechangesatanytimewithoutnotice.
Contents 00 SECTION00—GeneralInformationSECTION16—ElectricalSystem Group1671—Batteries,Support,andCables Group01—Safety Group02—GeneralSpecificationsGroup1672—Alternator,RegulatorandCharging SystemWiring Group03—TorqueValues Group04—FuelsandLubricantsGroup1673—LightingSystem 01 Group1674—WiringHarnessandSwitches Group1675—SystemControls SECTION01—Tracks Group1677—MotorsandActuators Group0130—TrackSystem Group0199—DealerFabricatedTools SECTION17—Frames,Chassis,orSupporting Structure SECTION02—AxlesandSuspensionSystems Group1740—FrameInstallation Group0201—DriveAxleHousingandSupport Group1746—FrameBottomGuards Group0250—AxleShaft,BearingsandReduction Group1749—ChassisWeights Gears Group0299—DealerFabricatedTools SECTION18—Operator’sStation 02 Group1800—RemovalandInstallation SECTION03—Transmission Group1810—OperatorEnclosure Group0300—RemoveandInstall Group1821—SeatandSeatBelt Group0315—ControlLinkage Group1830—HeatingandAirConditioning Group0360—HydrostaticSystem Group0399—DealerFabricatedTools SECTION19—SheetMetal Group1910—HoodandEngineEnclosures SECTION04—Engine Group1921—GrilleandGrilleHousing Group0400—RemovalandInstallation SECTION20—Safety,Convenienceand Miscellaneous
03 Group2004—HornandWarningDevices
SECTION05—EngineAuxiliarySystems
Group3260—HydraulicSystem Group3299—DealerFabricatedTools
Group3240—Frames
04
05 COPYRIGHT 2004 DEERE&COMPANY Moline,Illinois Allrightsreserved AJohnDeereILLUSTRUCTION Manual PreviousEditions Copyright 1995,1997,1999,2000,2001 07 11 15 16 TM1589(10AUG04) i 750C,850C,750CII,850CIICrawler 081004 PN=1
00 Section00 GeneralInformation Contents PagePage Group01—Safety 00-01-1 TrackRollers,FrontIdler,CarrierRoller andTrackFrameOuterPivotOil ..........00-04-7 Group02—GeneralSpecifications Grease 00-04-7 750CSeriesIISpecifications 00-02-1 LubricantStorage 00-04-8 750CSeriesIICapacitySpecifications 00-02-3 AlternativeandSyntheticLubricants 00-04-8 750CSeriesIIGeneralSpecifications 00-02-4 MixingofLubricants 00-04-9 750CLTSeriesIIDimensions 00-02-6 DieselEngineCoolant 00-04-9 750CWTSeriesIIDimensions 00-02-9 750CLGPSeriesIIDimensions 00-02-11 850CSeriesIISpecifications .............. 00-02-13 850CSeriesIICapacitySpecifications ...... 00-02-16 850CSeriesIIGeneralSpecifications 00-02-17 850CLTSeriesIIDimensions 00-02-19 850CWTSeriesIIDimensions 00-02-22 850CLGPSeriesIIDimensions 00-02-24 Group03—TorqueValues HardwareTorqueSpecifications 00-03-1 KeepingROPSInstalledProperly 00-03-1 CheckingTrackShoeCapScrewTorque 00-03-2 CheckingTrackShoeCapScrewTorque— MasterLink 00-03-3 MetricBoltandCapScrewTorqueValues 00-03-5 AdditionalMetricCapScrewTorqueValues...00-03-6 ServiceRecommendationsforMetric SeriesFourBoltFlangeFitting 00-03-8 UnifiedInchBoltandCapScrewTorque Values 00-03-9 CheckOilLinesAndFittings 00-03-10 ServiceRecommendationsforO-Ring BossFittings 00-03-11 ServiceRecommendationsforFlatFace O-RingSealFittings 00-03-13 ServiceRecommendationsforInchSeries FourBoltFlangeFittings ............... 00-03-14 Group04—FuelsandLubricants DieselFuel ............................ 00-04-1 HandlingandStoringDieselFuel 00-04-1 FuelTank 00-04-2 LowSulfurDieselFuelConditioner 00-04-2 DieselFuelStorage 00-04-3 DieselEngineOil 00-04-4 Transmission,Hydraulic,andHandPump ReservoirOil 00-04-5 InnerandOuterFinalDriveOil ............. 00-04-6 TM1589(10AUG04) 00-1 750C,850C,750CII,850CIICrawler 081004 PN=1
HandleFluidsSafely—AvoidFires
Whenyouworkaroundfuel,donotsmokeorworknear heatersorotherfirehazards.
Storeflammablefluidsawayfromfirehazards.Donot incinerateorpuncturepressurizedcontainers.
Makesuremachineiscleanoftrash,grease,anddebris. Donotstoreoilyrags;theycanigniteandburn spontaneously.
PreventBatteryExplosions
Keepsparks,lightedmatches,andopenflameawayfrom thetopofbattery.Batterygascanexplode.
Nevercheckbatterychargebyplacingametalobject acrosstheposts.Useavolt-meterorhydrometer.
Donotchargeafrozenbattery;itmayexplode.Warm batterytospecification.
PrepareforEmergencies
Bepreparedifafirestarts.
Keepafirstaidkitandfireextinguisherhandy.
Keepemergencynumbersfordoctors,ambulanceservice, hospital,andfiredepartmentnearyourtelephone.
Group01 Safety 00 01 1
DX,FLAME–19–04JUN90–1/1
TS227–UN–23AUG88
DX,SPARKS–19–03MAR93–1/1
TS204–UN–23AUG88
Specification Battery—Warm16°C(60°F) DX,FIRE2–19–03MAR93–1/1
TS291–UN–23AUG88
TM1589(10AUG04) 00-01-1 750C,850C,750CII,850CIICrawler 081004 PN=9
PreventAcidBurns
Sulfuricacidinbatteryelectrolyteispoisonous.Itisstrong enoughtoburnskin,eatholesinclothing,andcause blindnessifsplashedintoeyes.
Avoidthehazardby:
1.Fillingbatteriesinawell-ventilatedarea.
2.Wearingeyeprotectionandrubbergloves.
3.Avoidingbreathingfumeswhenelectrolyteisadded.
4.Avoidingspillingordrippingelectrolyte.
5.Useproperjumpstartprocedure.
Ifyouspillacidonyourself:
1.Flushyourskinwithwater.
2.Applybakingsodaorlimetohelpneutralizetheacid.
3.Flushyoureyeswithwaterfor15—30minutes.Get medicalattentionimmediately.
Ifacidisswallowed:
1.Donotinducevomiting.
2.Drinklargeamountsofwaterormilk,butdonot exceed2L(2 quarts).
3.Getmedicalattentionimmediately.
Safety 00 01 2
DX,POISON–19–21APR93–1/1
TS203–UN–23AUG88
TM1589(10AUG04) 00-01-2 750C,850C,750CII,850CIICrawler 081004 PN=10
Section01 Tracks Contents 01 Page Page DisassembleLubricatedTrackChainto Group0130—TrackSystem TurnBushingsandLubricateChain ..... 01-0130-55 EssentialTools 01-0130-1 AssembleLubricatedTrackChaintoTurn ServiceEquipmentandTools 01-0130-2 BushingsandLubricateChain 01-0130-58 OtherMaterial 01-0130-4 DisassembleandAssembleLubricatedTrack Specifications 01-0130-5 ChaintoTurnPinsandBushingsandNot RemoveandInstallRockGuardsand Lubricate 01-0130-65 TrackGuides 01-0130-11 AdjustTrackSag 01-0130-72 MeasureCarrierRollerWear 01-0130-12 TrackAdjusterExplodedView 01-0130-74 RemoveandInstallCarrierRoller 01-0130-13 RemoveTrackAdjusterandRecoil DisassembleandAssembleCarrier Spring ........................... 01-0130-75 Roller ............................ 01-0130-14 InstallTrackAdjusterandRecoilSpring...01-0130-77 InspectMetalFaceSeals 01-0130-16 DisassembleandAssembleRecoil TestCarrierRollerforOilLeakage ....... 01-0130-18 Spring 01-0130-80 MeasureTrackRollerWear 01-0130-19 DisassembleandAssembleTrack RemoveandInstallTrackRoller ......... 01-0130-20 AdjusterCylinder 01-0130-83 DisassembleTrackRoller 01-0130-22 RemoveTrackFrame 01-0130-85 AssembleTrackRoller ................ 01-0130-25 WeldingProcedure 01-0130-87 TestTrackRollerforLeakage 01-0130-30 RemoveandInstallA-FrameBearingand MeasureTrackShoeGrouserWear ...... 01-0130-31 A-FrameBushings 01-0130-88 RemoveandInstallTrackShoe 01-0130-32 InstallTrackFrame ................... 01-0130-90 ExplodedViewofFrontCrossbarand RemoveandInstallWearStriponInner Support—750C 01-0130-34 Guide ............................ 01-0130-95 RemoveandInstallFrontCrossbarand RemoveandInstallTrackFrameUpperWear Support—750C 01-0130-35 Strips 01-0130-96 RemoveandInstallFrontCrossbarand RemoveandInstallTrackFrameLowerWear Support—850C(S.N.—833331) 01-0130-37 Strips 01-0130-98 CheckandAdjustFrontCrossbar-to-Crossbar RemoveandInstallTrackFrameWear SupportandMainFrameClearances(S.N.— StripBar 01-0130-99 833331) 01-0130-39 MeasureFrontIdlerWear 01-0130-100 RemoveandInstallSupportWearPlates RemoveFrontIdler .................. 01-0130-101 (S.N.—833331) 01-0130-41 DisassembleFrontIdler .............. 01-0130-102 RemoveandInstallPinnedCrossbarand InspectMetalFaceSeals ............. 01-0130-104 Support—850C(S.N.833332— ExplodedViewofFrontIdler 01-0130-105 907600) .......................... 01-0130-42 AssembleFrontIdler 01-0130-106 CrossbarLube InstallFrontIdler 01-0130-113 RemoveandInstall ................. 01-0130-45 AdjustFrontIdlerVerticalMovement 01-0130-114 Crossbar AdjustFrontIdlerHorizontalMovement...01-0130-115 DisassembleandAssemble ........... 01-0130-46 TestFrontIdlerforOilLeakage 01-0130-116 MeasureLinkHeight 01-0130-47 RemoveandInstallSprocketSegment...01-0130-117 MeasureBushingOutsideDiameterfor LubricatedTrackChain 01-0130-48 Group0199—DealerFabricatedTools MeasureTrackPitchforLubricatedTrack DFT1087TrackRecoilSpringCompression Chain 01-0130-50 ToolGuard 01-0199-1 RemoveandInstallLubricatedTrack Continuedonnextpage Chain ............................ 01-0130-51 TM1589(10AUG04) 01-1 750C,850C,750CII,850CIICrawler 081004 PN=1
Contents Page DFT1041TrackNutRemovalTool 01-0199-2 ST4920TrackRecoilSpringCompression Tool .............................. 01-0199-3 01 TM1589(10AUG04) 01-2 750C,850C,750CII,850CIICrawler 081004 PN=2
RemoveandInstallRockGuardsandTrackGuides
1—CapScrew(4used)5—TrackGuide9—CapScrew(12used)12—RockGuard
2—Washer(2used)6—RockGuard10—LockWasher(6used)13—TrackGuide
3—CapScrew(6used)7—Washer(20used)11—Nut(6used)14—Spacer(3used)
4—Spacer(3used)8—CapScrew(6used)
NOTE:Removalandinstallationofrockguardsand trackguidesaresimilarforboth750Cand 850C.
1.Removeparts(1—14).
IMPORTANT:Beforeweldingonthismachine:To avoidcontrolcircuitdamage,turn theelectricaldisconnectswitchoff, disconnectwiringharnessand braidedgroundstrapfrom transmissioncontroller,and disconnectthewiringharnessfrom thedisplaymonitorpanelindash. Removebothcomponents. Goodweldsareimportant.Haveonly aqualifiedwelderrepairthe components.UseE7018electrodes. Beforewelding,cleanalldirtand paintfromtheweldareasandturn thebatterydisconnectswitchto "OFF".Connectthewelderground clampclosetoeachweldareaso electricalcurrentdoesnotpass throughanybearings.
2.Inspectrockguards(6and12)andtrackguides(5 and13)forwearanddamage.Repairorreplace partsasnecessary.
3.Applyhighstrengththreadlockandsealertocap screws(1,3,8and9).
4.Installinnerrockguard,guide,washersandcap screws.
5.Putcapscrewsthroughinnerguideorinnerguard, spacer,outerguideorouterguard,washer(10)and nut.Tightenthenutstospecification.
Specification
OuterTrackGuide-to-Inner TrackGuideNut—Torque407N•m(300lb-ft)
6.Installouterguardandguidecapscrews.
7.Installbottomtwosprocketshields-to-trackguide capscrewsandtightentospecification.
Specification
SprocketShield-to-TrackGuide CapScrews—Torque350N•m(255lb-ft)
TrackSystem 01 0130 11 TX,0130,SS2454–19–13JUN95–1/2
T6076AD–UN–26OCT88
TM1589(10AUG04) 01-0130-11 750C,850C,750CII,850CIICrawler 081004 PN=83 Continuedonnextpage
8.Installsprocketshieldtotrackframecapscrews. Tightencapscrewstospecification.
Specification
SprocketShield-to-TrackFrame CapScrews—Torque675N•m(500lb-ft)
MeasureCarrierRollerWear
NOTE:SeeUndercarriageAppraisalManualSP326for additionalinformation.
ItemMeasurementSpecification
750CNewCarrierRollerOD171.5mm(6.75in.)
750C100PercentWornCarrierOD158.5mm(6.24in.)
Roller
850CNewCarrierRollerOD187.5mm(7.30in.)
850C100PercentWornCarrierOD168.0mm(6.61in.)
Roller
1.Positionanoutsidecalipersoverthemostwornareaof rollerrunningsurface,andcloseuntilcalipertipsjust touchtreadsurface.
2.Measurecalipertipspreadusingthescaletothe nearest0.5mm(0.002in.).
3.Checkforflatspotsoncarrierrollerthread,which indicaterollerisnotfreetoturn.
TrackSystem 01 0130 12
TX,0130,SS2454–19–13JUN95–2/2
TX,9020,RR5396–19–13JUN95–1/1
T5819AC–UN–01NOV88
TM1589(10AUG04) 01-0130-12 750C,850C,750CII,850CIICrawler 081004 PN=84
RemoveandInstallCarrierRoller
CAUTION:Greaseintrackadjustmentcylinder isunderhighpressure.Slowlyloosencheck valvefittingtoreleasegreasefromtrack tensionadjuster.
1.Slowlyturncheckvalvefittingcounterclockwiseone turntoreleasetracktension.(SeeAdjustTrackSagin thisgroup.)
2.Raiseandsupporttrackchainusingachainandhoist.
CAUTION:Theapproximateweightofcarrier rolleris27kg(60lb).
3.Loosencapscrews(A)toremovefrontorrearcarrier rollers.
4.Installcarrierrollerandbottomintosupport.Tighten capscrews.
5.Checkforproperalignmentofcarrierrollers.
6.Ifoutofalignmentloosencapscrews(A)andadjust outward.
TrackSystem 01 0130 13 TX,0130,SS2402–19–13JUN95–1/1
T8402AA–UN–20MAY95
TM1589(10AUG04) 01-0130-13 750C,850C,750CII,850CIICrawler 081004 PN=85
DisassembleandAssembleCarrierRoller
1.Removecapscrews(H)andcover(I).
2.Drainoilfromhousing.
3.Removecapscrews(J)andretainerplate(G)from shaft(K).
4.Pressouterbearingcone(F)andshaft(K)outofroller shell(B)usingapress.
5.Pressinnerbearingcone(L)fromshaft.Bearingisa pressfit.
IMPORTANT:Metalfacesealscanbereusedifthey arenotwornordamaged.Ausedseal mustbekepttogetherasasetbecause ofwearpatternsonsealringface.
6.Removesnapring(D),sealretainer(C)andmetalface seals(E).Keepsealringstogetherasamatchedset withfacestogethertoprotectlappedsurfaces.Inspect metalfaceseal.(Seeprocedureinthisgroup.)
7.Removebearingcups(A).Inspectrollershellfor grooved,burredorgalledcondition.
8.Replacepartsasnecessary.
A—BearingCup(2used)
B—RollerShell
C—SealRetainer
D—SnapRing
E—MetalFaceSeal
F—BearingCone
G—RetainerPlate
H—CapScrew(3used)
I—Cover
J—CapScrew(2used)
K—Shaft
L—BearingCone
M—O-Ring
N—Seal
O—JDG204SealInstallationTool
P—SealRetainer
TrackSystem 01 0130 14
TX,0130,SS2404–19–13JUN95–1/3
T8401AB–UN–20MAY95
Continuedonnextpage TM1589(10AUG04) 01-0130-14 750C,850C,750CII,850CIICrawler 081004 PN=86
9.Installbearingcups(A)intorollershell,installtight againstshoulders.
10.Installinnerbearingcone(L)tightagainstshoulderon shaft.Bearingisapressfit.
11.Installshaft(K)inrollershell.
12.Pressouterbearingcone(F)onshaftsobearingis evenwithendoftheshaft.
13.Installretainerplate(G)andcapscrews(J).Tighten capscrewstospecification.
Specification
CarrierRollerRetainerPlateCap Screws—Torque47N•m(35lb-ft)
IMPORTANT:O-ringandseatsurfacesmustbeclean, dryandoilfreesoO-ringsdonotslip whenrolleristurning.
14.ThoroughlycleantheO-ringsandseatsurfacesin roller,sealretainerandsealringsusingavolatile, non-petroleumbasesolventandlint-freetissues.
15.InstallonehalfofmetalfacesealusingJDG204Seal Installationtool(O)intosealretainer(P).Installother halfofseal(N)intorollershell.
16.Applyequalpressurewiththefingersatfourequally spacedpointsonsealringface.O-ringandsealring shouldseatsquarelyinbore.
NOTE:Avolatile,non-petroleumbasesolventortalcum powdermaybeusedasalubricant.
17.Wipebothmetalsealringfacesdrywithalint-free tissue.
18.Applyathinfilmofoil,asusedintheroller,tothe shinysealingareaonbothmetalsealrings.
19.Installsealretainer(C)andsnapring(D)onroller shaft.
TrackSystem 01 0130 15 TX,0130,SS2404–19–13JUN95–2/3 T8401AB–UN–20MAY95 T8401AC–UN–22MAY95
TM1589(10AUG04) 01-0130-15 750C,850C,750CII,850CIICrawler 081004 PN=87 Continuedonnextpage
20.Fillrollerwith356mL(12oz)ofcleanoilin750Cand 410mL(14oz)in850C.(SeeTrackRoller,Front Idler,andCarrierRollerOil,Group0004.)
Specification
CarrierRoller—750COil— Capacity356mL(12oz)
CarrierRoller—850COil— Capacity410mL(14oz)
21.Installcover(I)andcapscrews(H).Tightencap screwstospecification.
Specification
CarrierRollerCoverCap Screws—Torque47N•m(35lb-ft)
InspectMetalFaceSeals
1.Inspectforthefollowingconditionstodetermineif sealscanbereused:
• Thenarrow,highlypolishedsealingarea(E)mustbe intheouterhalfofsealringface(D).
• Sealingareamustbeuniformandconcentricwith theIDandODofsealring(A).
• Sealingareamustnotbechipped,nicked,or scratched.
A—SealRing B—WornArea(shadedarea)
C—SealRingFace D—OuterHalfofSealRingFace E—SealingArea(darkline)
01 0130 16
TrackSystem
TX,0130,SS2404–19–13JUN95–3/3
T47,0130,5939HQ–19–25AUG93–1/3
T85079–UN–24AUG93
Continuedonnextpage TM1589(10AUG04) 01-0130-16 750C,850C,750CII,850CIICrawler 081004 PN=88
2.Illustrationshowsexamplesofwornsealrings(A).
I—Sealingarea(D)isininnerhalfofsealringface(C).
II—Sealingarea(D)notconcentricwithIDandODof sealring.
A—SealRing
B—WornArea(shadedarea)
C—InnerHalfofSealRingFace
D—SealingArea(darkline)
3.Cleanreusablesealsbyremovingallforeignmaterial fromsealrings,exceptsealface(A),usingascraper orastiffbristledfiberbrush.
4.WashsealringsandO-ringsusingavolatile, non-petroleumbasesolventtoremovealloil. Thoroughlydrypartsusingalint-freetissue.
Applyathinfilmofoiltosealringface.Putfaceofseal ringstogetherandholdusingtape.
TrackSystem 01 0130 17
T85080–UN–05DEC96
T47,0130,5939HQ–19–25AUG93–2/3
T82840–UN–23FEB89
T47,0130,5939HQ–19–25AUG93–3/3
TM1589(10AUG04) 01-0130-17 750C,850C,750CII,850CIICrawler 081004 PN=89
TestCarrierRollerforOilLeakage
1.Turnrollerseveraltimestoseatmetalfaceseals.
2.Installparts(A—F).
3.Pressurizerollertospecificationusingairpressure.
Specification
CarrierRollerLeakageTest—Air
Pressure117 ± 10kPa(1 ± 0.2bar)(17 ± 3psi)
4.Closevalveandwaitfortwominutes.Makesureroller maintainsairpressureandoildoesnotleakpast O-ringormetalfaceseals.
5.Ifrollerleaksoilordoesnotmaintainpressure,check O-ringorseals.Repairasnecessaryandrecheckfor leaks.
6.Installandtightenplug.
A—PressureGauge0—689kPa(0—6.89bar)(0—100 psi)
B—38H1338StraightMaleConnector(-6MORFSx -12MORB)
C—JT03456O-RingFaceSeal(2used)(17/16-20M JICx11/16-16FORFS)
D—Shut-OffValve
E—Regulator
F—38H1030Tee(-6FORFSx-6MORFSx-6M ORFS)ParkerNo.(6R6LOS)
TrackSystem 01 0130 18
TX,0130,SS2405–19–11MAR96–1/1
T8402AB–UN–20MAY95
TM1589(10AUG04) 01-0130-18 750C,850C,750CII,850CIICrawler 081004 PN=90
MeasureTrackRollerWear
ItemMeasurementSpecification
RollerTreadDiameter
750CNewOD203.0mm(7.99in.)
750C100PercentWornOD184.2mm(7.25in.)
850CNewOD210mm(8.27in.)
850C100PercentWornOD188mm(7.4in.)
NOTE:Minimumusedisthemaximumallowablewear forrebuildingrollertread.
Undersomeconditionsrollerwearcanbeuneven.If wearisuneven,thesingleflangerollersmaybe interchangedwithothersingleflangerollerstoeven outwear.Doubleflangerollersmaybeinterchanged withotherdoubleflangerollers.
1.Raiseunitoffthegroundandsupportitusingshop stands.
2.Releasetracktensionbyturningthecheckvalve oneturncounterclockwisetoallowgreaseto escape.
3.Measurerollertreaddiameterusingacalipersuchas JT07193SpecialRollerCaliperfromJT05518A UndercarriageInspectionKit.
NOTE:SeeTrackRollers,750C,750C-LGPand750C SeriesIITrackRollerTreadDiameter,or850C, 850CSeriesII,and850C-LGPTrackRollerTread DiameterinUndercarriageAppraisalManual SP326foradditionalinformation.
TrackSystem 01 0130 19 TX,9020,YY994–19–22MAR95–1/2
TX,9020,YY994–19–22MAR95–2/2 T6813AM–UN–29JAN98
TM1589(10AUG04) 01-0130-19 750C,850C,750CII,850CIICrawler 081004 PN=91
RemoveandInstallTrackRoller
CAUTION:Greaseintrackadjustercylinderis underextremepressure.DONOTremove greasefittingstoreleasetracktension.
1.Turncheckvalve(1)oneturncounterclockwiseto releasegreasefromtrackadjuster.
2.Putapieceofpipebetweenthesprocketandthetrack chainandrotatetracktoretracttheadjustingcylinderif required.
3.Removeinnerandouterrockguards.(SeeRemove andInstallRockGuardsandTrackGuidesinthis group.)
4.Raisecrawlerhighenoughtoremoverollers.Putshop standsundermachine.
CAUTION:Theapproximateweightoftrack rollersis59kg(129lb).
5.Removecapscrews(1)toremoveroller(2).
6.Allmachineshaveseventrackrollers.Singleand doubleflangerollersareusedalternatelystartingat idlerwithasingleflangeroller.
01 0130 20
TrackSystem
TX,0130,DU1324–19–30SEP93–1/4
T6033BB1–UN–26OCT88
T80581–UN–26OCT88
TX,0130,DU1324–19–30SEP93–2/4
TX,0130,DU1324–19–30SEP93–3/4
T82634–UN–26OCT88
TM1589(10AUG04) 01-0130-20 750C,850C,750CII,850CIICrawler 081004 PN=92 Continuedonnextpage
7.Installtrackroller(2)withoilfillplugtowardoutsideof unit.
8.Carefullylowercrawleruntilrollercapscrewscanbe installed.
9.Tightencapscrews(1)tospecification.
Specification
750CTrackRoller-to-Track FrameCapScrew—Torque320N•m(235lb-ft)
Specification
850CTrackRoller-to-Track
FrameCapScrew—Torque620N•m.(460lb-ft)
10.Applyhighstrengththreadlockandsealertotrack guideandrockguardcapscrewsbeforeinstalling guidesandguards.(SeeRemoveandInstallRock GuardsandTrackGuidesinthisgroup.)
11.Adjusttracksag.(SeeAdjustTrackSaginthis group.)
TrackSystem 01 0130 21 TX,0130,DU1324–19–30SEP93–4/4 T80581–UN–26OCT88
TM1589(10AUG04) 01-0130-21 750C,850C,750CII,850CIICrawler 081004 PN=93
DisassembleTrackRoller
1—Lock6—O-Ring11—O-Ring16—LockWasher
2—InnerCollar7—DowelPin12—Roller17—CapScrew
3—O-Ring8—Bushing13—OuterCollar18—CapScrew
4—MetalFaceSeal9—SnapRing14—Plug19—LockWasher
5—BushingCase10—RollerShaft15—O-Ring
TX,0130,DU1328–19–11AUG93–1/5
TrackSystem 01 0130 22
T6018BE–UN–26OCT88
TM1589(10AUG04) 01-0130-22 750C,850C,750CII,850CIICrawler 081004 PN=94
Continuedonnextpage
NOTE:Singleanddoubleflangerollersareofthesame design.Disassemblyproceduresarethesamefor bothtypesofrollers.
1.RemoveplugwithO-ringtodrainoilfromroller.
2.Removelockfrominnercollarbeforeputtingroller assemblyinpress.
3.Usea35mmdisk(1)andpresstocompressthemetal facesealsslightly.Removethesnapring(2)fromboth sidesofrollershaft(3).
4.Removeouterandinnercovers(1).
NOTE:Metalfacesealsareamatchedset.Sealsarenot interchangeablewithotherseals.
5.Removemetalfacesealfrominnerandoutercovers.
NOTE:Metalfacesealsarematchedsets.Sealsarenot interchangeablewithotherseals.
6.Removeandinspectmetalfaceseals.(SeeInspect MetalFaceSealsinthisgroup.)
7.RemoveO-rings(2)frombothendsofshaft.
8.Removecapscrews(1)frombushingcaseatboth endsofroller.
TrackSystem 01 0130 23 TX,0130,DU1328–19–11AUG93–2/5 T80426–UN–26OCT88
TX,0130,DU1328–19–11AUG93–3/5 T80427–UN–26OCT88
TX,0130,DU1328–19–11AUG93–4/5 T6018BC–UN–26OCT88
TM1589(10AUG04) 01-0130-23 750C,850C,750CII,850CIICrawler 081004 PN=95 Continuedonnextpage
9.Removerollershaft(1)andbushingcase(2)usinga 55mmdisk(3)andpress.
10.Removerollershaftfrombushingcase.
11.Turnrollerover.Usedisk(3),shaft,andpressto removebushingcasefromrollerhousing.
12.Inspectbushinginbushingcaseforexcessivewear, pittingorscoring.Replace,ifnecessary.
TrackSystem 01 0130 24 TX,0130,DU1328–19–11AUG93–5/5 T80432–UN–26OCT88
TM1589(10AUG04) 01-0130-24 750C,850C,750CII,850CIICrawler 081004 PN=96
AssembleTrackRoller
DoubleFlangeTrackRollerShown
1—InnerCollar6—O-Ring(2used)11—SnapRing(2used)16—Bushing(2used)
2—Lock7—Shaft12—O-Ring(4used)17—Roller
3—CapScrew(12used)8—OuterCollar13—MetalFaceSeal(2used)18—Washer(4used)
4—LockWasher(12used)9—Plug14—BushingCase(2used)19—CapScrew(4used)
5—O-Ring(2used)10—O-Ring15—Pin(2used)
TX,0130,DU1330–19–25AUG93–1/11
TrackSystem 01 0130 25
T8063AG–UN–08SEP93
Continuedonnextpage TM1589(10AUG04) 01-0130-25 750C,850C,750CII,850CIICrawler 081004 PN=97
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NOTE:Assemblyofsingleanddoubleflangerolleristhe same.Singleflangeshown.
1.Usingastraightedgemarkthebushing(1)fromthe centerlineofthedowelpinholes(bothsides)tothe centerlineofthedowelpins(2).Alignthemarkson thebushingwiththedowelpinsinthebushingcase.
2.Pressbushingintocase.
3.Installbushingcase(1)usingstuds(2),80mmdisk (4),andapress.
4.Removealigningstuds.Installcapscrewsandlock washer.Tightencapscrews.
5.Turnroller(3)overandcarefullyinstallrollershaft.
6.Installbushingcase(1)usingaligningstuds(2),80 mmdisk(4),andapress.
7.Removestuds.Installcapscrewsandlockwashers. Tightencapscrews.
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T8404BG–UN–20MAY95
TX,0130,DU1330–19–25AUG93–2/11
1—Bushing 2—DowelPin 3—BushingCase 4—Disk(107mm) 5—O-RingGroove 6—AlignmentMark
T80440–UN–26OCT88
TX,0130,DU1330–19–25AUG93–3/11
1—BushingCase 2—Stud 3—Roller 4—Disk(80mm) 5—Pipe
TM1589(10AUG04) 01-0130-26 750C,850C,750CII,850CIICrawler 081004 PN=98 Continuedonnextpage
