Toro ProLine H800 - Hydraulic System Maintenance; Hydraulic System Safety; Hydraulic Fluid Specification

Chapter5
HydraulicSystem
TableofContents
GeneralInformation..............................................................................................................................5–3
CheckingtheHydraulicFluid.............................................................................................................5–3
PushingorT owingtheTractionUnit...................................................................................................5–4
ReleasingPressurefromtheHydraulicSystem.................................................................................5–5
TractionCircuitComponentFailure....................................................................................................5–6
HydraulicHoses.................................................................................................................................5–7
InstallingtheHydraulicHosesandTubes..........................................................................................5–8
InstallingtheHydraulicFittings........................................................................................................5–10
HydraulicSchematic............................................................................................................................5–13
HydraulicFlowDiagrams.....................................................................................................................5–14
TractionCircuit.................................................................................................................................5–14
SteeringCircuit................................................................................................................................5–19
HeightOfCutCircuit........................................................................................................................5–22
AuxiliaryControlCircuit....................................................................................................................5–25
TestingtheHydraulicSystem..............................................................................................................5–32
TestingtheTractionCircuit-ChargePressure................................................................................5–34
TestingtheWheelMotorsEfciency................................................................................................5–38
TestingtheTractionCircuit-HydraulicPumpFlowandReliefPressure...........................................5–44
TestingtheSteeringCircuit-SteeringControlValve,ReliefValvePressureandSteering
Cylinder............................................................................................................................................5–49
TestingtheSteeringCircuit-ChargePumpFlow.............................................................................5–52
TestingtheAuxiliaryControlCircuit-CuttingDeckLiftCylinderInternalLeakage.............................5–56
TestingtheAuxiliaryControlCircuit-HopperLiftCylinderInternalLeakage.....................................5–58
TestingtheAuxiliaryControlCircuit-HopperTiltCylinderInternalLeakage.....................................5–60
TestingtheHeightOfCutCylinderInternalLeakage........................................................................5–62
ServiceandRepairs...........................................................................................................................5–63
GeneralPrecautionsforRemovingandInstallingtheHydraulicSystemComponents......................5–63
CheckingtheHydraulicLinesandHoses.........................................................................................5–65
FlushingtheHydraulicSystem.........................................................................................................5–66
FilteringtheClosed-LoopTractionCircuit........................................................................................5–68
PrimingtheHydraulicPump.............................................................................................................5–70
ChargingtheHydraulicSystem........................................................................................................5–72
HydraulicTank.................................................................................................................................5–74
AuxiliaryControlValve.....................................................................................................................5–78
TractionNeutralArmAssembly........................................................................................................5–81
HydraulicPumpAssembly...............................................................................................................5–82
ServicingtheHydraulicPistonPump...............................................................................................5–86
ServicingtheGearPump.................................................................................................................5–88
FrontWheelMotors.........................................................................................................................5–92
RearWheelMotors..........................................................................................................................5–96
ServicingtheHydraulicWheelMotor.............................................................................................5–101
DifferentialValve............................................................................................................................5–103
HeightOfCutValve........................................................................................................................5–106
LiftCylinder....................................................................................................................................5–109
SteeringControlValve...................................................................................................................5–112
SteeringCylinder...........................................................................................................................5–115
HopperLiftCylinder.......................................................................................................................5–118
HopperTiltCylinder.......................................................................................................................5–121
ProLineH800
Page5–1
HydraulicSystem
19241SLRevB