Komatsu PC88MR-10 Shop Manual page 987

No. Cause
Defective L.H. travel
19
motor (check valve)
Malfunction of travel
motor (counterbalance
20
valve and check valve)
PC88MR-10
Troubleshooting of hydraulic and mechanical system (H-
Procedure, measuring location, criteria, and remarks
If pressure compensation valves are found to be normal in checks on causes
(12) and (13), check valves may malfunction.
Interchange check valves on FORWARD and REVERSE sides of same travel
motor, and check whether failure symptom changes.
The counterbalance valve and check valve of travel motor may have the
malfunction. Check them.
(It may be checked from how the symptom changes after switching between
forward and reverse travel by a motor or after swapping right and left motors.)
40 Troubleshooting
mode)
40-499