Travel Motor Does Not Work (Only One Side) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
H-21 Travel motor does not work (only one side)
Trouble

• Travel motor does not work (only one side).

Related
• Carry out the troubleshooting in working mode A.
information
Defective seal of travel
1 control valve
(suction valve)
Malfunction of travel motor
2
(counterbalance valve)
Possible causes
Malfunction of travel motor
3
and standard
(safety-suction valve)
value in normal
state
4 Defective travel motor
5 Defective final drive
20-520
(1)
Cause Standard value in normal state/Remarks on troubleshooting
The seal of the suction valve of the travel control valve may be defec-
tive. Check it directly.
The counterbalance valve of the travel motor may have a malfunction.
Check it directly.
The safety-suction valve of the travel motor may have a malfunction.
Check it directly.
aPrepare with engine stopped, then run engine at high idling and carry
out troubleshooting.
Relieved in TRAVEL position
The final drive may have a defect in it. Check it directly. (It may be
checked by abnormal sound, abnormal heating, metal chips in drain oil,
etc.)
Travel lever
H-21
Leakage from travel motor
Max. 10 l/min
PC130-7