Case CX60C - Machine Control Unit (MCU) Troubleshooting

7-TROUBLESHOOTING
MachineControlUnit(MCU)-Troubleshooting
NOTE:tomatchthepumpabsorptiontorquewiththeenginetorque,MCUvariestheelectroproportionalpressure
reducingvalveoutputpressure,whichcontrolpumpdischargeamountwheneverfeedbackedenginespeeddrops
underthereferencerpmofeachmodeset.ThreeLEDlampsontheMCUdisplay.
Problem
PossibleCauseCorrection
G(green)andR(red)are
turnedON
TroubleonMCUSeeyourauthorizeddealer.
G(green)andY(yellow)
areturnedON
Troubleonserialcommunicationline
Seeyourauthorizeddealer.
ThreeLEDareturnedOFFTroubleonMCUpowerCheckthefuse.
Seeyourauthorizeddealer.
Othersystems-Troubleshooting
NOTE:thischapterdescribestheeasydiagnosticmethodsforgenericproblemsandtheremediesforthem.Ifyou
cannotndthecauseofaproblemorsolveaproblem,consulttheCASECONSTRUCTIONdealer.
Problem
PossibleCauseCorrection
Trackslipoutofplace.
Excessivewearofthe
sprocket
IncorrecttensionoftrackAdjusttensionoftrack
Bucketeitherrisesslowly
ornotatall
Lowoillevel
Addoiltospeciedlevel
Slowspeedoftravel,
swing,boom,armand
bucket
Lowoillevel
Addoiltospeciedlevel
Unusualnoiseemitted
frompump
Hydraulictankstrainercloggedordirty
Cleanthehydraulictankstrainer
Excessiveoiltemperature
riseofhydraulicoil
Dirtyoilcooler
Cleantheoilcooler
IncorrectfanbelttensionAdjustfanbelttension
Lowoillevel
Addoiltospeciedlevel
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