Service Manual

TestingtheliftCircuit–ReliefValve(PRV)Pressure..........................................................................4–78
TestingtheLiftCircuit–LiftCylinderInternalLeakage.......................................................................4–81
TestingtheLiftCircuit–GearPump(P4)Flow...................................................................................4–84
ServiceandRepairs...........................................................................................................................4–87
GeneralPrecautionsforRemovingandInstallingtheHydraulicSystemComponents......................4–87
CheckingtheHydraulicLinesandHoses.........................................................................................4–88
PrimingtheHydraulicPumps...........................................................................................................4–88
FlushingtheHydraulicSystem.........................................................................................................4–89
FilteringtheClosed-LoopTractionCircuit........................................................................................4–91
ChargingtheHydraulicSystem........................................................................................................4–94
HydraulicTank.................................................................................................................................4–96
HydraulicPumpDriveshaft...............................................................................................................4–98
HydraulicPumpAssembly.............................................................................................................4–101
ServicingthePiston(Traction)Pump.............................................................................................4–106
ServicingtheGearPump...............................................................................................................4–107
FrontWheelMotors........................................................................................................................4–110
ServicingtheFrontWheelMotor....................................................................................................4–114
RearWheelMotors........................................................................................................................4–116
ServicingtheRearWheelMotor....................................................................................................4–119
CrossTrax™AWDControlManifoldAssembly...............................................................................4–121
ServicingtheCrossTraxAWDControlManifoldAssembly.............................................................4–123
DeckControlManifoldAssembly...................................................................................................4–124
ServicingtheDeckControlManifoldAssembly..............................................................................4–127
CuttingDeckMotor........................................................................................................................4–130
ServicingtheCuttingDeckMotor...................................................................................................4–134
LiftControlManifold.......................................................................................................................4–139
ServicingtheLiftControlManifold..................................................................................................4–142
LiftCylinder....................................................................................................................................4–144
ServicingtheLiftCylinder..............................................................................................................4–147
SteeringControlValve...................................................................................................................4–150
ServicingtheSteeringControlValve..............................................................................................4–154
SteeringCylinder...........................................................................................................................4–155
ServicingtheSteeringCylinder......................................................................................................4–158
OilCoolerAssembly.......................................................................................................................4–161
AdditionalReferenceMaterials
DanfossLPVPumpRepairManual
DanfossLPVPumpServiceManual
EatonDeltaMotorsPartsandRepairManual
ParkerTorqmotorServiceProcedure(TC,TB,TE,TJ,TF ,TG,TH,andTLSeries)
DanfossOSPMSteeringUnitServiceManual
HydraulicSystem:ServiceandRepairs
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Groundsmaster
®
4300-D
16226SLRevD