Komatsu WA380-6 Operation & Maintenance Manual page 191

OPERATION
TRANSMISSION CUT-OFF FUNCTION
When the transmission cut-off switch is turned ON, the pilot lamp
lights up and the following transmission cut-off function is actuated.
Position (a): OFF
Position (b): ON
When the brake pedal is depressed, the brakes are actuated and
the transmission is returned to Neutral when the brake pedal is
depressed to the set position.
REMARK
For details of the method of adjusting the set position for the amount that the brake pedal is depressed, see
"ADJUSTING TRANSMISSION CUT-OFF POSITION (PAGE 3-135)".
To match the following type of work, adjust the set position to cut off the transmission at a smaller or larger angle.
When carrying out scooping-up work, lower the brake pedal
depression position for the cut-off (transmission shifted to
neutral). In this setting, the transmission driving force is cut at a
point where there is ample braking force, so this prevents the
machine from slipping down.
When approaching dump trucks during loading operations, raise
the brake pedal depression position for the cut-off (transmission
shifted to neutral). In this setting, the fine control of the braking
immediately before dumping the load can be carried out with the
brake only, so this makes it easy to control and allows the
machine to be brought to a soft stop.
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OPERATION