Komatsu PC138US-11 Operation & Maintenance Manual page 383

MAINTENANCE
METHOD FOR RELEASING PRESSURE IN ACCUMULATOR
1.
Lower the work equipment to the ground.
REMARK
Close the crusher attachment jaws, etc.
2.
Set the lock lever to LOCK position (L).
3.
Perform the following procedure within 15 seconds.
REMARK
After the engine stops, the accumulator pressure decreas-
es gradually. You can release the pressure only just after
the engine stops.
1)
Turn the starting switch to OFF position (A), and then
stop the engine.
2)
Turn the starting switch to ON position (B).
3)
Set lock lever to FREE position (F), then operate the
work equipment control levers and the attachment
control pedal fully to the front, rear, right, and left to re-
lease the pressure in the control circuit.
WENAM00111
MAINTENANCE PROCEDURE
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