Komatsu WA500-6H, Operation & Maintenance Manual

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Operation 3.3 Operation
WA500-6H – VEAM430100
3-125
3.3.9 Semi auto digging operations
Semi auto digging function
With semi auto digging, the bucket tilt operation is automatically
controlled. The purpose of this is to make bucket operations
easier and relieve the load on the operator.
For details of the work that can be carried out with a wheel
loader, see "Digging operations (3-129)".
Actuation of semi auto digging
Set the semi auto digging selector switch to ROCK mode or
LOOSE mode to match the material being handled.
1. Drive the machine forward and lower the bucket to a position
approx. 300 mm (11.8 in) above the ground.
2. Press the kickdown switch to shift down to F1.
3. Depress the accelerator pedal and dig the cutting edge of
the bucket into the stockpile.
4. Operate the lift arm in the RAISE direction, then return it to
HOLD, or set the lift arm control lever to the detent position.
This is taken as the starting signal, and semi auto digging
will start after approx. 1 second.
During semi auto digging operations, the tilt is operated auto-
matically and the lift arm rises at the same time, even when the
lift arm control lever is at the HOLD position.
REMARK
When carrying out digging operations with the speed range in
1st, if the kickdown switch is pressed, the mode will enter the
semi auto digging mode.
Finishing semi auto digging
The semi auto digging finishes when the following condition is
reached or the following operation is carried out, and the auto-
matic tilt operation and automatic lift arm RAISE operation stop.
z
When the automatic tilt operation sets the bucket to the full
tilt position.
z
When the lift arm rises above the horizontal position.
z
When the directional lever is operated to a position other
than FORWARD.
z
When the semi auto digging selector switch is turned OFF.
GK050136