Toro Groundsmaster 360 - Troubleshooting; General Hydraulic System Problems

Troubleshooting
Thefollowingchartcontainssuggestionsthatcanbeusedtosolveperformance
issuesspecictothehydraulicsystem.Thesuggestionsarenotall-inclusive.
Therecanbemorethan1causeforamachinemalfunction.
ReviewthehydraulicschematicinAppendixA(pageA–1)—FoldoutDrawings
andinformationonthehydraulicsystemoperationintheHydraulicFlow
Diagrams(page4–14).Thisinformationwillbeusefulduringthehydraulic
troubleshootingprocess.
RefertoT estingtheHydraulicSystem(page4–39)forprecautionsandspecic
hydraulictestprocedures.
GeneralHydraulicSystemProblems
Problem
PossibleCauses
Thehydraulicuidisleakingfromthesystem.•Thetting(s),hose(s),ortube(s)arelooseordamaged.
•TheO-ring(s)orseal(s)aremissingordamaged.
Thehydraulicuidfoamsexcessivelycausinguidleakage
fromthehydraulictankbreather.
Note:Someaerationofthehydraulicuidonthismachine
isnormal.Thisaeration(foaming)maybemorenoticeable
afterinitialllingofhydraulictank.
•Thehydraulic-uidlevelinthehydraulictankislow.
•Thehydraulicsystemhasawrongtypeofuid.
•Oneofthepumpsuctionlineshasanairleak.
•Incompatiblehydraulicuidsaremixedinthesystem.
•Thereiswaterinthehydraulicsystem.
Thehydraulicsystemoperateshot.•Thetransmissionpressureishighduetoloadordragging
brakes.
•Thehydraulic-uidlevelinthehydraulictankisloworthe
inletlterislooseorclogged.
•Thehydraulicuidiscontaminatedortheuidviscosity
istoolight.
•Theoilcoolerisdamagedorplugged.
•Theoilcoolerairowisobstructed.
•Thetransmissionbypassvalve(s)isopenordamaged.
•Thegearpumpreliefvalveisstuckopen.
•ThedeckliftswitchisheldintheRAISEpositionfortoolong
causinghydraulicuidtobeatreliefpressures.Anelectrical
problemcouldexistwiththedeckliftswitchorcircuitwiring
thatcouldcauseexcessivehydraulictemperatures.
•Thetransmissioncheckvalveisnotseatingorisdamaged.
•Thechargepressureislow.
•Thetransmissionorwheelmotor(s)iswornordamaged.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
HydraulicSystem:Troubleshooting
Page4–34
Groundsmaster360
16225SLRevC