Service Manual

MowCircuitProblems
Problem
PossibleCause
Noneofthecuttingdeckswilloperate.
ElectricalproblemexiststhatpreventsPRV
solenoidvalveinPTOmanifoldsfrombeing
energized(seeChapter6:ElectricalSystem
(page6–1))
Note:Toengagethemowcircuit,theseat
mustbeoccupied,thecuttingdeck(s)must
befullyloweredthetractionspeedmustbein
theLOW(mow)positionandthePTOswitch
mustbeon.
Fronttwo(2)gearpumpsectionsformow
circuitsarewornordamaged.
Onecuttingdeckwillnotoperate.Electricalproblem(e.g.solenoidcoilinPTO
manifold,cuttingdeckpositionswitch)exists
(seeChapter6:ElectricalSystem(page6–1)).
Cuttingdeckproblemexists(e.g.drivebelt,
deckspindle).
Systempressuretotheaffectedcuttingdeck
islow.
Woodruffkeyonaffecteddeckmotoris
damaged.
Proportionalreliefvalve(PRV)inPTOmanifold
foraffecteddeckisfaulty.
CartridgevalveinPTOmanifoldforaffected
deckisdamagedorsticking.
Deckmotorforaffecteddeckisdamaged
(NOTE:ifappropriate,transferasuspected
damagedmotortoanothercuttingdeck.If
problemfollowsthemotor,motorisfaultyand
needsrepairorreplacement).
Gearpumpsectionforaffecteddeckisworn
ordamaged.
Allcuttingdecksoperateslowly.EngineRPMislow.
Alldeckmotorsarewornordamaged.
Fronttwo(2)gearpumpssectionsformow
circuitsarewornordamaged.
Cuttingdeckstopsunderload.ProportionalreliefvalveinPTOmanifoldfor
affecteddeckisby−passing.
Deckmotorhasinternalleakage(by−passing
oil).
Gearpumpsectionforaffecteddeckisworn
ordamaged.
Groundsmaster
®
4000-D&4010-D
Page3–5Troubleshooting:
13202SLRevF