Komatsu PC138USLC Operation & Maintenance Manual page 361

MACHINE READY FOR ATTACHMENT
When Using General Attachment Such as Crusher
1. If the pedal is depressed with lock pin (1) set at the full stroke
position (c), the attachment begins to work.
2. After the work is finished, return the lock pin to the LOCK
position (a) to lock the pedal.
Precautions when Using
Check that the stopper valve is in the FREE position.
(a) FREE: Hydraulic oil flows (direction of arrow is parallel to long
direction of arm)
(b) LOCK: Hydraulic oil does not flow (direction of arrow is at right
angles to long direction of arm)
Check that the working mode is ATT mode.
Open the front right cover and check that the selector valve is in
the General Attachment position (for crusher, etc).
Open the front right cover and check that the selector valve
stopper bar (2) is installed at the General Attachment position
(for crusher, etc).
For other precautions when using the attachment, see the instruction manual provided by the attachment
manufacture.
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ATTACHMENTS AND OPTIONS