Case 570T - Swing - Troubleshooting

8-TROUBLESHOOTING
Swing-Troubleshooting
Problem
PossibleCauseCorrection
Rightorleftswingis
inoperative,istooslowor
losespower
Theswingcircuitreliefvalvesarenotseat-
ing,settoatoolowvalueorthereisaleak
intheseat
Testtheswingcircuitreliefvalve
Valvespoolleaking
Inspectthespoolandcheckitforwearor
scratches
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinderandthering
nut
Theswingfailstoslow
down(bearingstop)at
strokeend
Built-inslidinglimiterdamagedDisassembleandinspect
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinder
Theswingdoesnotstop
whenthecontrollever
returnstoneutral(one
directiononly)
Thecircuitreliefvalve(returnside)isstuck
open,settoatoolowvalueorthereisa
leakintheseat
Testtheswingcircuitreliefvalve
Valvespoolleaking
Inspectthespoolandcheckitforwearor
scratches
Cylinderleak(spoolsin
neutral)
Internalvalveleak
Inspectthespoolandcheckitforwearor
scratches
Cylindersealsleakingorcylinderbarrel
damaged
Inspectandresealthecylinder
Acircuittemporarily
lowerswhengiventhe
controltolift
Loadcheckvalvebetweencontrolvalve
sectionsdamaged
Disassembleandinspect
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