Komatsu PW98MR-10 Operation & Maintenance Manual page 378

MAINTENANCE PROCEDURE
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 switch fully to the front, rear, left, and right to
release the pressure in the control circuit.
4.
Set lock lever to LOCK position to lock the work equipment
control levers and the attachment control pedal switch.
5.
Turn the starting switch to OFF position (A).
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MAINTENANCE