Case 570T - Backhoe attachment - Troubleshooting

8-TROUBLESHOOTING
Backhoeattachment-Troubleshooting
Problem
PossibleCauseCorrection
Theliftingsystemis
inoperative,istooslow,
losespowerordoesnot
hold
Theliftingcircuitreliefvalveisstuckopen,
settoatoolowvalueorthereisaleakin
theseat
Testthepressureoftheliftingcircuitrelief
valve
Valvespoolleaking
Inspectthespoolandcheckitforwearor
scratches
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinder
Thediggingcontrolfails
tooperate,isslowor
losespower
Thediggingcircuitreliefvalve(cylinder
end)isstuckopen,settoatoolowvalue
orthereisaleakintheseat
Testthepressureofthediggingcircuitrelief
valve
Valvespoolleaking
Inspectthespoolandcheckitforwearor
scratches
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinder
Thebucketfailsto
operate,issloworloses
power
Thebucketreliefvalve(rodend)isstuck
open,settoatoolowvalueorthereisa
leakintheseat
Testthepressureofthebucketreliefvalve
Valvespoolleaking
Inspectthespoolandcheckitforwearor
scratches
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinder
Thetelescopicdipper
failstooperate,isslowor
losespower
Thetelescopicdippercircuitreliefvalve
(cylinderend)isstuckopen,settoatoo
lowvalueorthereisaleakintheseat
Testthepressureofthetelescopicdipper
reliefvalve
Valvespoolleaking
Inspectthespoolandcheckitforwearor
scratches
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinder
StabilizerpadsleakingStabilizersafetyvalveleakingInspectandoverhaulthestabilizersafety
valve
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinder
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