Komatsu WA380-6 Operation & Maintenance Manual page 188

OPERATION
CHANGING DIRECTION
When changing direction between FORWARD and REVERSE, check
that the new direction of travel is safe. There is a blind spot behind the
machine, so be particularly careful when changing direction to travel in
reverse.
Do not switch between FORWARD and REVERSE when traveling at high
speed.
When switching between FORWARD and REVERSE, depress the brake
to reduce the travel speed sufficiently, then change the direction of
travel. (Max.speed for changing direction: 12 km/h (7.5 MPH))
There is no need to stop the machine even when switching
between FORWARD and REVERSE.
Place directional lever (1) in the desired position.
Position (F): Forward
Position (N): Neutral
Position (R): Reverse
Check that the backup alarm sounds when the directional lever
is set to REVERSE. If the backup alarm does not sound, please
contact your Komatsu distributor for repairs.
REMARK
If the directional lever is operated slowly or is stopped midway between the forward and reverse directions, "E01
MAINTENANCE" may be displayed on the character display. In this case, there is no failure, but try to operate the
directional lever so that the change in direction is completed within 2 seconds.
If an attempt is made to switch the direction between FORWARD
and REVERSE while traveling at high speed (when using 3rd or
4th), if the travel speed and engine speed are in ranges (A) or (B)
in the chart, the central warning lamp will light up and the alarm
buzzer will sound.
At the same time, "OVERRUN PROTECT" is displayed on the
bottom line of the character display.
If the alarm buzzer sounds, depress the brake pedal immediately
to reduce speed, then operate the directional lever to switch
between FORWARD and REVERSE.
(X): Travel speed (km/h)
(Y): Engine speed (rpm)
WARNING
( ): Machines fitted with
20.5-20-16PR tires
OPERATION
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