Toro 30403 Service Manual

Chapter5
HydraulicSystem
TableofContents
Specications.......................................................................................................................................5–3
Groundsmaster3280-Dand3320-G..................................................................................................5–3
GeneralInformation..............................................................................................................................5–4
CheckingtheHydraulicFluid.............................................................................................................5–4
PushingorT owingtheTractionUnit...................................................................................................5–5
ReleasingPressurefromtheHydraulicSystem.................................................................................5–6
TractionCircuitComponentFailure....................................................................................................5–7
HydraulicHoses.................................................................................................................................5–8
InstallingtheHydraulicHoseandTube(O-RingFaceSealFitting).....................................................5–9
InstallingtheHydraulicFittings(SAEStraightThreadO-RingFittingintotheComponent
Port).................................................................................................................................................5–11
HydraulicSchematics..........................................................................................................................5–15
HydraulicFlowDiagrams.....................................................................................................................5–19
TractionCircuit(MachineSerialNumberbelow316000000)............................................................5–19
TractionCircuit(MachineSerialNumberabove316000000)...........................................................5–24
LiftCircuit(MachineSerialNumberbelow311000000)....................................................................5–27
LiftCircuit(MachineSerialNumberabove311000000)....................................................................5–31
SteeringCircuit(MachineSerialNumberbelow316000000)...........................................................5–35
SteeringCircuit(MachineSerialNumberabove316000000)...........................................................5–37
SpecialTools.......................................................................................................................................5–39
HydraulicPressureTestingKit.........................................................................................................5–39
15GPMHydraulicTesterKit(PressureandFlow)............................................................................5–39
40GPMHydraulicT ester(PressureandFlow).................................................................................5–40
HydraulicHoseKit...........................................................................................................................5–40
HydraulicTestFittingKit...................................................................................................................5–41
O-RingKit........................................................................................................................................5–42
HighFlowHydraulicFilterKit...........................................................................................................5–42
RemoteStarterSwitch.....................................................................................................................5–43
Troubleshooting...................................................................................................................................5–44
GeneralHydraulicSystemProblems...............................................................................................5–44
TractionCircuitProblems.................................................................................................................5–45
Lift/LowerCircuitProblems..............................................................................................................5–46
SteeringCircuitProblems................................................................................................................5–46
TestingtheHydraulicSystem..............................................................................................................5–47
ChargePressureT est(UsingPressureGauge)(MachineSerialNumbersbelow
316000000)......................................................................................................................................5–49
ImplementReliefPressureTest(UsingPressureGauge)(MachineSerialNumbersbelow
316000000)......................................................................................................................................5–51
LiftCylinderInternalLeakageTest(MachineSerialNumbersbelow316000000).............................5–53
SteeringCylinderInternalLeakageT est(MachineSerialNumbersbelow316000000)....................5–55
ChargePumpFlowT est(UsingTesterWithPressureGaugesandFlowMeter)(MachineSerial
Numbersbelow316000000)............................................................................................................5–57
TestingtheTractionCircuit–ChargePressure(MachineSerialNumbersabove
316000000)......................................................................................................................................5–59
TestingtheTractionCircuit–HydraulicPumpFlowandReliefPressure(MachineSerialNumbers
above316000000)...........................................................................................................................5–62
TestingtheSteeringCircuit–SteeringControlValve,ReliefValvePressure,andSteeringCylinder
(MachineSerialNumbersabove316000000)..................................................................................5–66
Groundsmaster
®
3280-D/3320
Page5–1
HydraulicSystem
05138SLRevB

Toro 30403 Specifications

General

Brand	Toro
Model	30403
Category	Lawn Mower
Language	English