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Troubleshooting
Safety, Operation and Maintenance Manual - Aug 2012
6-36
SY115C9/135C/155H Crawler Hydraulic Excavator
Failure
Causes
Remedy
One cylinder of work equip-
ment not working
●
Pilot valve failure
●
Pressure sensor failure
●
Work equipment control valve (spool) failure
●
Check/repair
●
Replace
●
Repair/replace
Work equipment cylinder
drifting excessively
●
Work equipment cylinder failure
●
Retaining valve (of boom or arm) failure
●
Work equipment control valve (safety valve and
feed valve) seal failure
●
Work equipment valve spool failure
●
Repair/replace
●
Repair/replace
●
Repair/replace
●
●
Repair/replace
Work equipment sluggish
●
Arm regeneration valve failure
●
Control valve (safety valve and feed valve) fail-
ure
●
Repair/replace
●
Repair/replace
O t h e r w o r k e q u i p m e n t
moves when single cylinder
is in relief.
●
Control valve seal failure
●
Replace
Travel speed drops remark-
ably during swing or travel
operation.
●
Straight travel valve failure
●
Repair/replace
Machine runs out during
travel
●
Travel pilot valve failure
●
Pilot relief valve failure
●
Regulator failure
●
Proportional solenoid valve sluggish
●
Travel valve spool sluggish
●
Central swivel joint sluggish
●
Travel motor failure
●
Travel pilot pressure sensor failure
●
Repair/replace
●
Replace
●
Repair/replace
●
Repair/replace
●
Repair/replace
●
Repair/replace
●
Repair/replace
●
Replace
Travel speed slow
●
Travel pilot valve failure
●
Pilot relief valve failure
●
Sensor failure
●
Travel control valve (spool) failure
●
Travel control valve (feed valve) failure
●
Travel motor failure
●
Repair/replace
●
Replace
●
Replace
●
Repair/replace
●
Repair/replace
●
Check/repair
Machine steering dif
fi
cult or
power insuf
fi
cient
●
Travel pilot valve failure
●
Travel pilot pressure sensor failure
●
Travel control valve (spool) failure
●
Travel control valve (feed) failure
●
Travel motor (safety valve) failure
●
Travel motor (check valve) failure
●
Repair/replace
●
Replace
●
Repair/replace
●
Repair/replace
●
Repair/replace
●
Repair/replace
Unable to shift travel speed
●
High/low travel speed shift valve failure
●
Travel motor failure
●
Repair/replace
●
Check/repair
Travel fails (on one side)
●
Travel control valve (feed valve) seat failure
●
Travel motor (safety valve) seat failure
●
Travel motor (feed valve) seat failure
●
Travel motor failure
●
Pilot pressure sensor failure
●
Repair/replace
●
Repair/replace
●
Repair/replace
●
Check/repair
●
Replace
Содержание SY115C9
Страница 109: ...System Functions Safety Operation and Maintenance Manual Aug 2012 3 4 SY115C9 135C 155H Crawler Hydraulic Excavator ...
Страница 193: ...Operation Safety Operation and Maintenance Manual Sep 2012 4 4 SY115C9 135C 155H Crawler Hydraulic Excavator ...
Страница 263: ...Maintenance Safety Operation and Maintenance Manual Aug 2012 5 4 SY115C9 135C 155H Crawler Hydraulic Excavator ...
Страница 403: ...Specifications SY115C9 135C 155H Crawler Hydraulic Excavator 7 2 Safety Operation and Maintenance Manual Aug 2012 ...