Komatsu D31EX-21, Operation & Maintenance Manual, Page: 126 / 256

OPERATION
OPERATION
3-74
2. After adjusting the seat position, adjust tether belt (1).
Tense the tether belt and install it when there is no one sit-
ting on the seat.
3. Sit on the seat and hold tongue (4) connected to wind-in
mechanism (2) and pull out the belt slowly so that the belt
will cover your abdomen sufficiently.
4. Insert tongue (4) in buckle (3) until it clicks. The belt is
pulled back into wind-in mechanism (2) until it is fitted to
your abdomen. The belt is locked under this condition and
cannot be extended anymore. Fit the belt to your abdomen
without twisting it.
REMARK
If the belt is locked before the tongue is inserted in the buckle, let it return to the wind-in mechanism, then repeat
the above procedure from the start.
5. Pull the belt to check that it is securely locked in position.
6. When removing the belt, press the red button on buckle (3).
The belt will automatically be wound in.
ADJUST MIRROR
Adjust the position so that the mirror gives a good view from
the operator's seat. In particular, be careful to adjust so that it is
possible to see people on the left and right sides at the rear of
the machine.