kobelco sk 120 mark v long arm
this machine repaired cobelco agent, these are they have done.
main hydraulics pump overhaul
pilot pump change
pump proportional solenoid change
all filters & hyd oil change
pressure relief valve change
but still machine is not OK.
:Banghead:Banghead:Banghead:Banghead
both tracks is OK. ( relief pressure 350bar )
boom is not OK. ( relief pressure approximately 170bar )
arm is not OK. ( relief pressure approximately 180bar )
bucket is not OK. ( relief pressure approximately 190bar )
swim is not OK. ( relief pressure approximately 180bar )
when backup switch is on no condition change (no pressure go up )
repair persons said valve box has a internal leak
i think all port valve is OK.
dear all my group any idea do you have for this ?
thanks in advance
this machine repaired cobelco agent, these are they have done.
main hydraulics pump overhaul
pilot pump change
pump proportional solenoid change
all filters & hyd oil change
pressure relief valve change
but still machine is not OK.
:Banghead:Banghead:Banghead:Banghead
both tracks is OK. ( relief pressure 350bar )
boom is not OK. ( relief pressure approximately 170bar )
arm is not OK. ( relief pressure approximately 180bar )
bucket is not OK. ( relief pressure approximately 190bar )
swim is not OK. ( relief pressure approximately 180bar )
when backup switch is on no condition change (no pressure go up )
repair persons said valve box has a internal leak
i think all port valve is OK.
dear all my group any idea do you have for this ?
thanks in advance