Komatsu D65EX-12 Operation & Maintenance Manual page 103

OPERATION
ADJUST ARM REST
The height of the armrests on both sides of the operator's seat
can be adjusted to three levels. After adjusting the operator's
seat, adjust the height of the armrests properly.
1. Loosen knobs (1) on both sides of the operator's seat.
2. Move the armrests on both sides of the operator's seat
forward, then adjust their height to (H), (M), or (L).
(H): High
(M): Medium
(L): Low
3. Move back both armrests.
4. Tighten knobs (1) securely.
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OPERATION