Toro Groundsmaster 3320-D - Traction Circuit Problems

TractionCircuitProblems
Problem
PossibleCauses
Tractionjerkywhenstarting.
•Frictionwheelontractionpedaloutofadjustmentorworn
(except3280-DModels30344and30345).
•Thetractioncontrollinkageisincorrectlyadjusted,
disconnected,binding,ordamaged.
•Thehydrostat/hydraulicpumpcheckvalveisnotseatingor
isdamaged.
Thetractionresponseissluggish.•Thehydraulicpumpbypassvalveisopenordamaged
(3280-DModels30344and30345).
•Thebrakeisdraggingorbinding.
•Thebrakesarenotreleased.
•Thechargepressureislow.
•Thehydraulicuidisverycold.
•Thehydrostat/hydraulicpumpcheckvalveisnotseatingor
isdamaged.
•Thehydrostat/hydraulicpumpiswornordamaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
Neutralisdifculttondorunitoperatesin1directiononly.
•Thetractioncontrollinkageisincorrectlyadjusted,
disconnected,binding,ordamaged.
•Thehydrostat/hydraulicpumpcheckvalveisnotseatingor
isdamaged.
•Thehydrostat/hydraulicpumpiswornordamaged.
Notractionexistsineitherdirectionandtheenginespeed
remainsconstant.
•Thebrakesarenotreleased.
•Thehydraulic-uidlevelinthereservoir(frontaxle)islow.
•Thehydraulicpumpbypassvalveisopen(3280-DModels
30344and30345).
•Thehydrostat/hydraulicpumpcheckvalveisnotseatingor
isdamaged.
•Thechargepressureislow.
•Thetransmission/hydraulicpumpdriveshaftorkey
damaged(thesteeringandliftcircuitsaffectedaswell).
•Thehydrostat/hydraulicpumpiswornordamaged.
•Thefrontaxleisdamaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
Groundsmaster
®
3280-D/3320
Page5–45
HydraulicSystem:Troubleshooting
05138SLRevB