Komatsu PW118MR-11 Operation & Maintenance Manual page 190

EXPLANATION OF COMPONENTS
Opening
1.
Stop the machine on solid ground, fully lower the attachment to the ground, then stop the engine.
2.
Set the lock lever to LOCK position (L).
3.
Check that the wiper blade is stowed in the right stay.
If the wiper is positioned incorrectly (b), lift it to the correct
position (a) or contact the Komatsu distributor for repair.
(a): Correct position.
The wiper is on the cab.
(b): Wrong posture.
The wiper is on the screen.
4.
Hold the 2 handles (A) on the right and left top sides of the
front window, and pull the 2 levers (B) to release the locks
at the top of the front window. The top section of the front
window can be extracted.
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OPERATION