Service Manual

LiftCircuitProblems
Problem
PossibleCause
Cuttingdeckswillnotraise.
EngineRPMistoolow
Note:Seatmustbeoccupiedinordertoraise
thecuttingdecks.
Hydraulicoillevelinreservoirislow(NOTE:
Otherhydraulicsystemsareaffectedaswell).
Solenoidvalve(S1)incombinationmanifold
isfaulty.
Electricalproblemexists(seeChapter6:
ElectricalSystem(page6–1)).
Liftarmpivotsarebinding.
Lift/lowerreliefvalveincombinationmanifold
isstuck.
Liftcylinder(s)is(are)damaged.
Gearpumpsectionforliftcircuitiswornor
damaged(NOTE:Awornordamagedgear
pumpsectionwillalsoaffectthesteering,
enginecoolingfanmotorandtractioncharge
circuits).
Cuttingdecksraise,butwillnotstayup.Liftcircuithydrauliclinesorttingsareleaking.
Combinationmanifoldcartridgevalve(s)for
lift/lowercircuitshasdamagedsealsoris
faulty.
Note:Liftcylinderscannotprovidean
absolutelyperfectseal.Acuttingdeckwill
eventuallylowerifleftintheraisedposition
duringstorage.
Liftcylinderforaffecteddeckisdamaged.
Cuttingdeckswillnotlower.Liftarmpivotsarebinding.
Electricalproblemexists(seeChapter6:
ElectricalSystem(page6–1)).
Solenoidvalve(S1)incombinationmanifold
isfaulty.
Counterbalancepressureisexcessive.
Note:Toloweracuttingdeck,theseatmust
beoccupiedandthetractionspeedmustbein
theLOW(mow)position.
Liftcylinderforaffecteddeckisdamaged.
Troubleshooting:Page3–6
Groundsmaster
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4000-D&4010-D
13202SLRevE