Komatsu HM400-1, Manual

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OPERATION
EXPLANATION OF COMPONENTS
OPERATION
EXPLANATION OF COMPONENTS
Activating the shift hold function will restrict the automatic shifting
of the transmission to gear speeds below the gearshift lever gear
shifting.
The shift hold function can be canceled by [1] moving the gearshift
lever or [2] activating the shift hold switch located on the gearshift
lever.
The shift hold pilot lamp located on the machine instrument panel
will indicated the status of the shift hold function.
Before starting either up or down a range, pre-select the
transmission gear and maintain a machine travel speed which will
give you full control under all the anticipated conditions.
DUMP LEVER
CAUTION
To prevent damage to the dump body through vibration from the road
surface, always lower the dump body before traveling.
This lever (4) is used to operate the dump body.
(a) RAISE
(b) HOLD: The dump body stops and is held in position.
(c) FLOAT: The dump body moves freely under external force.
(d) LOWER
Always set to the FLOAT position when traveling.
It is impossible to travel in reverse if the dump body is raised.
If the engine stops during the dump operation, the dump body is held in position, regardless of the position of the
dump lever. Even when the engine starts again, the dump body is held in position. For details of the method of
canceling the hold function, see "CANCELING DUMP BODY HOLD CONDITION (PAGE 3-84)".
RETARDER CONTROL LEVER
WARNING
The retarder must not be used as a parking brake.
Use this lever (5) to operate the retarder when traveling downhill.
The more the lever is pulled, the greater the braking force
becomes.
When the retarder is operated, the retarder operation lamp lights
up.
When leaving the operator's seat, always apply the parking brake.
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