Komatsu HD785-5, Operation & Maintenance Manual

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OPERATION
OPERATION
DUMP OPERATIONS
WARNING
When dumping a load, always carry out the dumping operation in
accordance with the signals from the flagman.
When dumping large rocks, operate the dump body slowly.
Do not load the dump body while it is still raised.
When carrying out inspection with the dump body raised, always use
the safety pins, set the dump lever to the HOLD position and lock it
securely. For details, see "SAFETY PIN (PAGE 3-35)".
Operate the dump body as follows.
1. Place shift lever (1) at the N position, and set parking brake
valve lever (2) to the PARKING position.
2. Move dump lever (3) to the RAISE position, then depress the
accelerator pedal to raise the dump body.
If the dump lever is released when it is at the RAISE position,
it is held at the RAISE position and the dump body will continue
to rise.
The dumping speed increases in proportion to the engine
speed.
3. When the dump body rises to the previously set position (dump
body positioner adjustment position), dump lever (3) is
returned to the HOLD position. The dump body is then held at
that position.
If it is necessary to raise the dump body further, move dump
lever (3) back to the RAISE position and the dump body will
rise. If dump lever (3) is released when doing this, it will return
to the HOLD position and the dump body will stop at that
position.
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