Komatsu PC138US-11 Operation & Maintenance Manual page 214

Hydraulic excavator
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MACHINE OPERATIONS AND CONTROLS
1.
Operate the tilt adjustment lever (4) upward or the tilt ad-
justment lever (3) downward, and set the seat tilt angle to
the desired position.
2.
Set the seat horizontally by the opposite inclination opera-
tion, and release the tilt adjustment lever.
Adjustment amount: 60 mm
METHOD FOR ADJUSTING ARMREST ANGLE
Raise and adjust armrest (5) to a position in the range of
approximately 90 °.
Finely adjust the vertical angle of the armrest by turning
adjustment dial (6) at the bottom of the armrest. If adjust-
ment dial (6) is turned clockwise (counterclockwise), the
armrest is raised (lowered).
When it is raised or lowered to the maximum position, ad-
justment dial (6) cannot be turned any more. In such case,
turn adjustment dial (6) counterclockwise (clockwise) when
the armrest is at the maximum raised (lowered) position.
Amount of angle adjustment: 25 ° ((A): 5 °, (B): 20 °)
REMARK
If the seat back is tipped to the front without raising arm-
rest (5), armrest (5) rises automatically.
3-144
WENAM00111
OPERATION

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