Komatsu PC88MR-10 Shop Manual page 990

40 Troubleshooting
Troubleshooting of hydraulic and mechanical system (H-
mode)
No. Cause
Defective R.H. travel
11
motor (parking brake)
Defective L.H. travel
12
motor (parking brake)
13 Defective travel motor
14 Defective final drive
40-502
Procedure, measuring location, criteria, and remarks
When running R.H. track idle off ground, if R.H. track does not run with R.H.
travel circuit pressure reaching relief pressure, travel parking brake may
malfunction.
When running L.H. track idle off ground, if L.H. track does not run with L.H.
travel circuit pressure reaching relief pressure, travel parking brake may
malfunction.
The travel motor may have a defect in it. Check it.
(It may be checked whether or not the direction of travel deviation changes by
swapping right and left travel motor and final drive assemblies.)
a Check for unusual noise, unusual heat, and metallic powders in drained oil
to make judgment.
PC88MR-10