Case 570T - Transmission - Troubleshooting

8-TROUBLESHOOTING
Transmission-Troubleshooting
Problem
PossibleCauseCorrection
Thevehicledoesnot
move
ControlvalvesupplyproblemCheckand,ifnecessary,replacethecon-
trolvalves
Damagedconnectionsoftransmissionand
vehiclewiringharness
Repairand,ifnecessary,replacethewiring
harness
Oxidationinthecontactsoftheelectricca-
blesofthewiringharness
Cleanthecontacts
Interruptionoftheelectriccable
Replacetheelectriccable
Damagetothesolenoids/solenoidvalves
Replacethesolenoids
DamagetosensorsReplacesensors
ShortcircuitsorbadcontactCheckand,ifnecessary,replacethefuses
IncorrectoillevelRestoretheoillevel
Checkforpossibleoilleaks
Eliminatetheleaksandrestoretheoillevel
SuctionstrainerrestrictionCleanthesuctionstrainer
DamagedoilpumpReplacetheoilpump
Damagedoilpumppressurereliefvalve
Replacetheoilpump
Damaged/restrictedlterReplacethelter
Damaged/stuckcontrolvalve
Replacethecontrolvalve
DamagedconverterReplacetheconverter
Oiltemperaturebelow0°C(32°F)Waitfortheoperatingtemperaturetobe
reached(stalltest)
DamagedrotatingsealsReplacetherotatingseals
Stuckshuttlelever
Repairtheshuttlelever
Excessivelyworn-outclutchassembly
Repairand,ifnecessary,replacetheclutch
assembly
Lackofmotiontransmission(brokengears,
shafts,bearings,etc)
Check,repairand,ifnecessary,replace
Thevehiclehasareduced
powertransmission
Incorrectoiltemperature
Waitfortheoperatingtemperaturetobe
reached(stalltest)
TransmissionoiloverheatingRestoreacceptabletemperaturevalues
Incorrectoperatingpressures
Checkthehydrauliccircuitandreplace(oil
pump,lters,controlvalve)
DamagedconverterReplacetheconverter
IncorrectoillevelRestoretheoillevel
Worn-outclutchassembly
Replace/repair
4WDfailstoengageRepair/replacethe4WDshaftassembly
Overheatedsolenoids/solenoidvalves
Replace
DamagetosensorsReplacesensors
Overheating
DamagedcoolingsystemRepairthecoolingsystem
Dirtyheatexchanger
Cleantheheatexchanger
UnintentionallyactivatedparkingbrakeDeactivatetheparkingbrake
Excessivesoildepositonaxlewheelhubs
Cleantheaxlewheelhubs
Seizure(brokengears,shafts,bearings,
etc)
Check,repairand,ifnecessary,replace
Brakingforceexternaltotransmission:axle
operatingproblem
Checkandrepairtheaxle
DraggingofclutchdisksRepairand,ifnecessary,replacetheclutch
disks
DamagedconverterReplacetheconverter
DamagedoilthermostatReplacetheoilthermostat
IncorrectoillevelRestoretheoillevel
Worn-outoilpumpReplacetheoilpump
Wheelrotationwithlifted
vehicle
DraggingofclutchdisksRepairand,ifnecessary,replacetheclutch
disks
Lowoiltemperature(highoilviscosity)Waitfortheoperatingtemperaturetobe
reached(stalltest)
Incorrectoilgradient
Changeoilandlters
DamagedcontrolvalveReplacethecontrolvalve
8-5