Service Manual

Table Of Contents
HydraulicTestSelection
Beforebeginninganyhydraulictest,identifyiftheproblemisrelatedtothe
tractioncircuit,steeringcircuit,hitchcylindercircuit,ortheattachmentcircuit.
Oncethefaultysystemhasbeenidentied,performteststhatrelatetothatcircuit.
Ifatractioncircuitproblemexists,considerperformingoneormoreofthe
followingtests:ChargePressureT est,and/orTractionPump(P1)and(P2)Flow
andReliefValveT est.
Ifasteeringorhitchcylindercircuitproblemexists,considerperformingoneor
moreofthefollowingtests:SteeringReliefValve(RV1)PressureT est,Hitch
CylinderT est,HitchCylinderReliefValve(RV2)PressureT est,and/orGear
Pump(P4)FlowTest.
Ifanattachment/loader/dumpcircuitproblemexists,considerperformingone
ormoreofthefollowingtests:CircuitReliefValvePressureTest,and/orGear
Pump(P3)FlowTest.
Note:Ifanattachmentmotorperformanceissuspect,performanAttachment
MotorEfciencyT est;refertotheattachmentInstallationInstructionsorService
Manual.
TractionCircuitTestingChargePressureTest
Chargepressuretestinginvolvesrecordingthechargepressurewiththe
tractionpumpundernoload(swashplatesclosed)andcomparingthatreading
tothechargepressurewhilethetractionpumpisunderamoderateload
(swashplatesopen).Chargepressureundernoloadateachtraction(piston)
pumpcanbeviewedwhilethevehicleisstationaryusingtheInfoCenter
SERVICE–TRACTION–TRACTIONINPUTS–FRONTTRACTIONandREAR
TRACTIONreadings.Aprocedureforcheckingthechargepressurewhilethe
tractionpumpisunderloadforthismachineisbeingdeveloped.Contactyour
localT oroDistributorforassistance
TractionCircuitTestingTractionPump(P1)and(P2)Flowand
ReliefValveTests
TheOutcross9060incorporatesatandem“dual”piston(traction)pump;one
pumptodrivethefrontaxleandtheothertodrivetherearaxle.Tractionpump
owtestinginvolvesmeasuringthepumpoutputowinhighrangeunderload.A
procedurefortestingthetractionpump(s)owandthereliefvalvesoperation
forthismachineisbeingdeveloped.ContactyourlocalToroDistributorfor
assistance.
Eachpumpincludestwopressurereliefvalves(forwardandreverseow)set
toopenat33,095kPa(4800psi).Reliefvalvetestinginvolvesincreasingthe
tractioncircuitload,verifyingthereliefvalveopensatornearthespecied
pressure.Aprocedurefortestingthereliefvalve(s)operationforthismachineis
beingdeveloped.ContactyourlocalT oroDistributorforassistance.
Outcross9060
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HydraulicSystem:TestingtheHydraulicSystem
18234SLRevD