Komatsu H75051 Operation & Maintenance Manual page 252

MACHINE OPERATIONS AND CONTROLS
METHOD FOR SWITCHING BETWEEN FORWARD AND REVERSE
• Check the safety in the direction which the machine moves into when switching the travel direction
between FORWARD and REVERSE.
The area behind the machine is a blind spot.
Pay attention particularly when traveling in reverse.
• Do not make a directional change while the machine is traveling at a high speed.
When switching the direction, depress the brake pedal to reduce the travel speed sufficiently, then
switch the direction. (Max. 13 km/h)
• When driving the machine downhill through inertia, set the directional lever to the position that
matches the machine traveling direction. If the direction lever is set to the direction opposite to that
of the machine travel, engine stall can result and it is very dangerous.
You can switch the travel direction without stopping the machine.
If you try to make a directional selection while the machine is
traveling at a high speed (when 3rd or 4th speed is used), the
centralized warning lamp lights up and alarm buzzer sounds if
the travel speed and engine speed are in hatched area of the
table.
If the alarm buzzer sounds, depress the brake pedal immedi-
ately to reduce the travel speed sufficiently, then make a direc-
tional selection.
(X): Travel speed ( km/h)
(Y): Engine speed ( rpm)
Directional selection by lever operation
Set the directional lever (1) to a 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, ask your Komatsu distribu-
tor for repair.
REMARK
If you operate the directional lever slowly or stop it at midway
between the lever positions, the centralized warning lamp may
light up and the alarm buzzer may sound. In this case, there is
no failure, but operate the directional lever so that directional
change is completed within 2 seconds.
3-186
k k
WARNING
OPERATION