Komatsu WA500-6H Operation & Maintenance Manual page 208

3.3 Operation
Do not push the machine in too far. If it is pushed in too far,
a high load will be brought to bear on the machine and this
will reduce the service life of the work equipment and frame.
Operate the control lever slowly near the end of the bucket
tilt operation. If the control lever is operated suddenly, an
impact load will be brought to bear on the tilt cylinder, and
there is danger that the cylinder may be damaged.
When close to pit excavation, do not let the front wheels rise
up on the cutting face. This will cause cuts to the tires.
1. Immediately in front of the rock, let the accelerator pedal
back and shift down from 2nd to 1st.
2. After shifting down, depress the accelerator pedal gradually
and push the rock.
3. Raise the lift arm slightly and increase the driving force of
the front wheels. When doing this, do not push in too far.
REMARK
When digging up large rocks, in some cases it may be better not
to raise the lift arm too high. If the lift arm is raised too high, the
rear wheels may come off the ground.
4. After loading the rock completely into the bucket, operate the
bucket tilt and lift 2 - 3 times repeatedly to fill the bucket.
5. Let back the accelerator pedal, operate the control levers
slowly, and tilt the bucket back fully.
6. To prevent the load from falling out of the bucket, after com-
pleting the scooping-up operation, operate in the dump and
tilt direction when the bucket is near the full tilt to stabilize
the load.
REMARK
If the brakes are operated lightly before traveling in reverse, it is
possible to stabilize the load in the bucket.
To prevent generation of heat in the torque converter, keep the
standard time for digging to within 10 seconds from the start of
pushing in to the completion of scooping up.
3-142
Operation
GK050147
WA500-6H – VEAM430100