One Of Tracks Does Not Run - Komatsu PC200-8M0 Shop Manual

500 Troubleshooting of hydraulic and mechanical system (H-mode)
H-21 One of tracks does not run
H-21 One of tracks does not run
q
Failure

One of tracks does not run

Related infor-
q
Perform all troubleshooting with working mode in power mode (P).
mation
Defective seal of travel con-
1
trol valve (suction valve)
Defective seal of travel
2
motor (safety valve)
Defective seal of travel
3
Probable
motor (check valve)
causes and cri-
teria
Malfunction of travel motor
4
(parking brake)
5 Defective travel motor
6 Defective final drive
PC200, 200LC, 220, 220LC-8M0
Cause
Seal of suction valve of travel motor may malfunction. Check it.
Seal of safety valve of travel motor may malfunction. Check it.
* You may replace the safety valves of forward and reverse sec-
tions of the same motor or those of the right and left motors
with each other and judge from the change of the phenomenon.
Seal of check valve of travel motor may malfunction. Check it.
* You may replace the check valves of forward and reverse sec-
tions of the same motor or those of the right and left motors
with each other and judge from the change of the phenomenon.
Parking brake of travel motor may malfunction. Check it.
a Be ready with engine stopped, then troubleshoot with engine at
full speed.
Final drive may have internal defect. Check it.
* It may be checked by abnormal sound, abnormal heating,
metal chips in drain oil, etc.metal chips in drain oil, etc.
Criteria and troubleshooting procedure
Travel lever
Travel system relief
SEN06139-00
Leakage from travel motor
27.2 l/min
40-500
31