Komatsu WA500-6H Operation & Maintenance Manual page 209

Operation
Traveling in reverse after excavating
NOTE
Do not operate the steering immediately after starting to
travel in reverse. The bucket is still thrust into the rocks, so if
the steering is operated, excessive force will be brought to
bear on the bucket or frame, and there is danger of damage
to the frame.
After shifting the transmission, operate the accelerator pedal
slowly. If the accelerator pedal is operated suddenly, the
tires will slip and this will cause wear or cutting of the tires.
1. After completing the excavation, shift to R2 and travel in
reverse without operating the steering.
2. As a guideline, reverse travel distance (a) should be 1.2 -1.5
times the length of the machine. At this distance, the rolling
of the tires can prevent wear to the tires.
In addition, keep an angle (b) of 60° at the intersection
between the straight line from the dilution and the straight
line from the dump truck.
REMARK
Decide the steering procedure to match the stopping point of the
dump truck and the condition of the dilution. When doing this,
decide the stopping point for the dump truck so that the operat-
ing angle for the steering is less than 20°.
(1) Gradual steering to left or right
(2) Gradual steering to dilution
(3) Direct line to dilution
3. When driving in reverse, do not raise the bucket more than
necessary.
Consider the position of the dump truck, the condition of the
road surface, the travel speed, and the speed of the work
equipment when deciding the height of the bucket. However,
do not raise the bucket so that the top of the load is higher
than the horizontal line of sight from the operator.
WA500-6H – VEAM430100
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3.3 Operation
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