Toro Greensmaster 3120 - Mow Circuit Problems

MowCircuitProblems
Problem
PossibleCauses
Hydraulictankuidlevelislow(otherhydrauliccircuits
affectedaswell).
Hydraulicpumpsuctionlineisrestricted.
Gearpump(P2)isnoisy(cavitation).
Hydraulicpumpsuctionlinehasanairleak.
MachineswithoutBacklap
MowermanifoldreliefvalveR1isstuckopen.
AnelectricalproblemexistswithsolenoidvalveS1(see
Chapter5-ElectricalSystem).
PilotoperatedreliefvalvePRVorpilotpistoninmower
manifoldisstuckclosedordamaged.
Gearpump(P2)isdamaged(seeGearPump(FrontSection)
FlowT estintheTestingsectionofthischapter).
MachineswithBacklap
MowermanifoldsolenoidvalveS1R1isstuckopen(not
shiftingtoitsenergizedposition).
AnelectricalproblemexistswithsolenoidvalveS1R1(see
Chapter5-ElectricalSystem).
FlowcontrolFC1inmowermanifoldisstuckopen.
PilotoperatedreliefvalvePRVorpilotpistoninmower
manifoldisstuckclosedordamaged.
Cuttingreelmotorswillnotturn.
Gearpump(P2)isdamaged;refertoGearPump(P2)Flow
TestintheT estingsectionofthischapter.
Amechanicalproblemwiththecuttingunitexists;referto
Chapter7-DPACuttingUnits.
MowermanifoldcartridgevalveInthereelcircuitisleaking
ordamaged.
Cuttingreelspeediserratic.
Mowermanifoldorice(OR1orOR2)isplugged(machines
withbacklaponly).
Amechanicalproblemwiththecuttingunitexists;referto
Chapter7-DPACuttingUnits.
MowermanifoldcartridgevalveInthereelcircuitisleaking
ordamaged.
Cuttingreelspeedislow.
Excessiveinternalwearinreelmotorexists;refertoReel
MotorCaseDrainFlowTestintheTestingsectionofthis
chapter.
HydraulicSystem:Troubleshooting
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Greensmaster3120
17230SLRevC