Komatsu PC138USLC Operation & Maintenance Manual page 334

MAINTENANCE
3. Keep the work equipment at the maximum reach, turn the
starting switch to the OFF position (A), and stop the engine.
4. Turn the starting switch to the ON position (B).
5. Set the lock lever to the FREE position (F).
6. Operate the work equipment control lever fully to the boom
LOWER position.
REMARK
Check that the area around the machine is safe, then operate the
work equipment control lever to the LOWER position.
7. Check that the work equipment goes down to the ground under
its own weight.
8. This completes the inspection.
NOTICE
If the nitrogen gas charge pressure in the accumulator is low and operations are continued, it will become impossible to release
the remaining pressure inside the hydraulic circuit if a failure occurs on the machine.
In the following cases, the charge pressure of the accumulator has gone down. Please contact your Komatsu
distributor.
Work equipment does not go down
Stops while going down
MAINTENANCE PROCEDURE
4 - 73