Komatsu WA480-8, Operation & Maintenance Manual

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Blasted rock
4.
At the same time as the bucket thrusts into the target ma-
terial, raise the boom to prevent the bucket from going in
too far. Raising the boom allows the front wheels to exert
sufficient traction.
If the bucket thrusts too much and, as a result, rising of the
boom or forward travel of the machine is stopped, release
the accelerator pedal somewhat. Proper operation of the
accelerator pedal for each type of the soil is effective for
saving of fuel and prevention of wear of the tires.
5.
Check that enough material is loaded into the bucket, then
operate the bucket control lever to repeat tilting back the
bucket and load the bucket fully.
If the bucket edge is moved up and down while digging
with the bucket by using rim pull, the front tires will come
off the ground and this will cause the tire slippage.
6.
If too much material is loaded in the bucket, perform quick
DUMP and TILT operation of the bucket to shake off the
excessive load so that the load does not spill during haul-
ing.
DIG AND LOAD ON HORIZONTAL SURFACE
• When digging the ground in digging and loading work on a level ground, set the bucket cutting edge facing
down slightly as follows and drive the machine forward. Always be careful not to load the bucket on one
side.
• The 1st gear speed is recommended.
k k
CAUTION
Do not set the bucket cutting edge downward more than 20 °.
MACHINE OPERATIONS AND CONTROLS OPERATION
3-208