Toro 30403 Service Manual

Lift/LowerCircuitProblems
Problem
PossibleCauses
Thecuttingdeck(orimplement)willnotliftorliftsslowly.
•EngineRPMistoolow.
•Thecuttingdeckhasexcessiveunwantedelementsin
cuttingchambers.
•Theliftarmorliftcylinderisbinding.
•Theliftvalvecontrollinkageisbindingorbroken(except
3280-DModels30344and30345).
•Thehydraulic-uidlevelinthereservoir(frontaxle)islow.
•Thechargepumppressureorowisinsufcient.
•Theimplementreliefvalveisstuckordamaged(except
3280-DModels30344and30345).
Note:Steeringcircuitalsoaffected.
•Theowcontroloriceintheliftcontrolvalveisplugged,
stuck,ordamaged.
•Theliftcontrolvalveisdamaged.
•Theliftcylinderleaksinternally.
Thecuttingdeck(orimplement)raises,butdoesnotstayup.•Theliftcylinderleaksinternally.
•Theliftcircuithydrauliclinesorttingsareleaking.
•Theliftcontrolvalveleaks(except3280-DModels30344
and30345).
•Airexistsintheliftcircuit.
•Thesolenoidvalve(SV2)intheliftcontrolvalveisdamaged
orleaks.
SteeringCircuitProblems
Problem
PossibleCauses
Thesteeringisinoperativeorsluggish.•EngineRPMistoolow.
•Thehydraulic-uidlevelinthereservoir(frontaxle)islow.
•Thesteeringcomponents(e.g.,tierods,steeringcylinder
ends)arewornorbinding.
•Thesteeringcylinderisbinding.
•Thesteeringreliefvalveinthesteeringcontrolvalveis
stuckordamaged.
•Thesteeringcylinderleaksinternally.
•Theimplementreliefvalveisstuckordamaged(except
3280-DModels30344and30345).
Note:Liftcircuitalsoaffected.
•Thesteeringcontrolvalveiswornordamaged.
•Thechargepumppressureorowislow.
Note:Lowchargepumpoworpressurewillalsoaffectthe
liftcircuit.
HydraulicSystem:Troubleshooting
Page5–46
Groundsmaster
®
3280-D/3320
05138SLRevB

Toro 30403 Specifications

General

Brand	Toro
Model	30403
Category	Lawn Mower
Language	English