Track Shoe Does Not Turn (On One Side Only) - Komatsu ecot3 PC300LC-8 Shop Manual

40 Troubleshooting
H-22 Track shoe does not turn (on one side only)
Trouble • Travel system does not move (only one side).
Related infor-
• Set the working mode in P-mode before start.
mation
Defective seal of travel con-
1
trol valve (suction valve)
Defective seal of travel motor
2
(safety valve)
Defective seal of travel motor
Possible causes
3
(check valve)
and standard
value in normal
state
Lowering of travel motor out-
4
put
5 Defective final drive
PC300, 350-8
Cause Standard value in normal state/Remarks on troubleshooting
Suction valve of travel control valve may have defective seal. Check
it directly.
Safety valve of travel motor may have defective seal. Check it
directly.
Check valve of travel motor may have defective seal. Check it
directly.
a
Final drive may have internal defect. Check it directly.
a
Prepare with engine stopped, then run engine at high idle and
carry out troubleshooting.
Travel lever
Travel relief
It may be checked by abnormal sound, abnormal heating,
metal chips in drain oil, etc.
SEN02633-03
Leakage from travel motor
Max. 30 l/min
25
1