Komatsu PC30MR-5 Operation & Maintenance Manual page 222

MACHINE OPERATIONS AND CONTROLS
METHOD FOR LOCKING OPERATOR CAB DOOR
1.
Lower the door lock cancel lever (4) to release the door
lock (3).
2.
Hold the handle inside the cab door and pull the cab door,
and hold the cab door handle (2) to close the cab door.
3.
Insert the starting switch key into the key slot (1).
4.
Turn the starting switch key to "LOCK" position (B), and
then remove the starting switch key.
Position (A)
OPEN
Position (B)
LOCK
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WENAM00150
OPERATION