Large Sound Is Made When Upper Structure Stops Swinging - Komatsu PC200-8M0 Shop Manual

SEN06139-00
H-26 Large sound is made when upper structure stops swinging
q
Failure

Large sound is made when upper structure stops swinging

Related infor-
q
Perform all troubleshooting with working mode in power mode (P).
mation
Malfunction of back pressure
1
valve
Malfunction of swing motor
2
(safety valve)
Probable
causes and cri-
Malfunction of swing motor
teria
3
(suction valve)
4 Defective swing machinery
38
40-500
500 Troubleshooting of hydraulic and mechanical system (H-mode)
H-26 Large sound is made when upper structure stops swinging
Cause
Backpressurevalve may have malfunction. Check it.
Safety valve of swing motor may malfunction. Check the valve.
Suction valve of swing motor may malfunction. Check the valve.
* This failure can be checked by interchaning right and left suc-
tion valves of swing motor and watching how condition
changes.
Swing machinery may have internal defect. Check it.
* It may be checked by abnormal sound, abnormal heating,metal
chips in drain oil, etc.
Criteria and troubleshooting procedure
PC200, 200LC, 220, 220LC-8M0