Komatsu PC138USLC Operation & Maintenance Manual page 183

MACHINE OPERATIONS AND CONTROLS
Adjusting Angle of Rear View Camera
If the image on the monitor is not aligned correctly, remove cover
(1) and adjust the mounting angle (A) of the rear view camera.
Amount of adjustment of angle (A): Within a range of 35°-80°
1. When removing cover (1), insert a flat-headed screwdriver into
the hole of cover (2), push the tooth on the inside, and remove
the cover.
2. Remove 2 bolts (3).
3. Remove cover (1).
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OPERATION