Toro 30344 - Troubleshooting; General Hydraulic System Problems

Troubleshooting
Thefollowingchartcontainssuggestionsthatcanbeusedtosolveperformance
issuesspecictothehydraulicsystem.Thesuggestionsarenotall-inclusive.
Therecanbemorethan1causeforamachinemalfunction.
ReviewthehydraulicschematicfoundinAppendixA(pageA–1)andinformation
onthehydraulicsystemoperationintheHydraulicFlowDiagrams(page5–19).
Thisinformationwillbeusefulduringthehydraulictroubleshootingprocess.
RefertoT estingtheHydraulicSystem(page5–47)forprecautionsandspecic
hydraulictestprocedures.
GeneralHydraulicSystemProblems
Problem
PossibleCauses
Thehydraulicuidisleakingfromthesystem.•Thetting(s),hose(s),ortube(s)arelooseordamaged.
•TheO-ring(s)orseal(s)aremissingordamaged.
Thehydraulicuidfoamsexcessively.
Note:Someaerationofthehydraulicuidonthismachine
isnormal.Thisaeration(foaming)maybemorenoticeable
afterinitialllingofhydraulicreservoir(frontaxle).
•Thehydraulic-uidlevelinthereservoir(frontaxle)islow.
•Thehydraulicsystemhasawrongtypeofuid.
•Oneofthepumpsuctionlineshasanairleak.
•Incompatiblehydraulicuidsaremixedinthesystem.
•Thereiswaterinthehydraulicsystem.
Thehydraulicsystemoperateshot.•Thetractionsystempressureishighduetoloadordragging
brakes.
•Thehydraulic-uidlevelinthereservoir(frontaxle)islow.
•Thehydraulicuidiscontaminatedortheuidviscosity
istoolight.
•Theoilcoolerisdamagedorplugged.
•Theoilcoolerairowisobstructed.
•Theoillterisplugged.
•Thehydraulicpumpbypassvalveisopenordamaged
(3280-DModels30344and30345).
•Thehydrostat/hydraulicpumpcheckvalveisnotseatingor
isdamaged.
•Thechargepressureislow.
•Thehydrostat/hydraulicpumpiswornordamaged.
•EngineRPMistoolow.
Note:If1tractioncircuitcomponenthasinternalwearor
damage,itispossiblethattheothertractioncomponents
arealsodamaged.
HydraulicSystem:Troubleshooting
Page5–44
Groundsmaster
®
3280-D/3320
05138SLRevB