Toro Groundsmaster 4300-D - Traction Circuit Problems

TractionCircuitProblems
Problem
PossibleCauses
Thetractionresponseissluggish.
•Thepiston(traction)pumpbypassvalveisopenor
damaged.
•Thebrakeisdraggingorbinding.
•Thepiston(traction)pumpcheckvalve,reliefvalve,and/or
ushingvalveisleaking.
•Thechargepressureislow.
•Thehydraulicuidisverycold.
•Thepiston(traction)pumporwheelmotor(s)iswornor
damaged.
•Theushingvalveinpiston(traction)pumpisnotseatingor
isdamaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
Neutralisdifculttond.
•Thetractioncontrollinkageisincorrectlyadjusted,
disconnected,binding,ordamaged.
•Thepiston(traction)pumpcheckreliefvalveisnotseating
orisdamaged
•Thepiston(traction)pumpiswornordamaged.
Notractionexistsineitherdirectionandtheenginespeed
remainsconstant.
•Thehydraulic-uidlevelinthehydraulictankislow.
•Thepiston(traction)pumpbypassvalveisopen.
•Thechargepressureislow.
•Theparkingbrakeisapplied,draggingorbinding.
•Thepiston(traction)pumporwheelmotor(s)iswornor
damaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
Thewheelmotordoesnotturn.
•Thepiston(traction)pumpbypassvalveisopen.
•Thepiston(traction)pumporwheelmotoriswornor
damaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
HydraulicSystem:Troubleshooting
Page4–40
Groundsmaster
®
4300-D
16226SLRevC