Komatsu WA380-8, Operation & Maintenance Manual

Page: 280 / 432

METHOD FOR RELEASING RAISE REMOTE BOOM POSITIONER
1.
Raise the boom above the horizontal level.
2.
Set the boom control lever to HOLD position and hold
down position (a) of switch (1) for more than 1 second.
A “beep” sounds and the stop position is reset.
With RAISE stop position reset, if the boom control lever is set to the detent position, the boom control lever
returns from the detent position to HOLD position when the boom reaches near the maximum height. At the
same time, the boom stops.
METHOD FOR OPERATING LOWER REMOTE BOOM POSITIONER
1.
Set the boom to a desired LOWER stop position between
the horizontal level and approximately 30 cm above the
ground.
2.
Set the boom control lever to HOLD position and press po-
sition (a) of switch (1).
A “beep” sounds and the position is set.
Operation checkup procedure
• Raise the boom above the horizontal level once, move the boom control lever to FLOAT position, and then
release your hand from the lever.
• The boom starts to lower and then stops lowering at the moment when the boom control lever is returned
from FLOAT position to HOLD position.
MACHINE OPERATIONS AND CONTROLS OPERATION
3-216