Inspection, Maintenance and Adjustment
4-37
DX380LC-7
5.
Move the safety lever down into "LOCK" position to
deactivate the work group and travel functions. Move the
work group (joystick) levers. There must be no movement
of the boom, arm, and attachment or swing functions when
the controls are moved.
6.
With the safety lever still in the "LOCK" position, move the
travel controls. There must be no movement of the
excavator tracks.
7.
Move safety lever up into "UNLOCK" position. Raise the
boom so the bucket (or other attachment) is about 3 m
(10 ft.) off the ground. Operate the work group (joystick)
lever to lower the boom slowly. While boom is lowering,
move the safety lever down into "LOCK" position. Boom
movement must stop. Repeat these steps for arm, bucket
(attachment), swing and travel functions.
8.
Lower work group to the ground and stop engine.
NOTE:
If the Safety Lever does not deactivate the work
group and travel functions as described above or if
any parts are damaged, bent or missing, contact your
DOOSAN distributor immediately for service. DO
NOT MODIFY THE SYSTEM.
Exterior Lights, Horn, Control Console
Indicator, Gauge Panel - Check
1.
Turn engine starter switch to "I" (ON) position and observe
all the indicator lights.
2.
Restore operation of any light bulbs that do not turn "ON"
now.
3.
Sound the horn. Repair or replace if required.
4.
Turn "ON" and inspect all exterior work lights. Replace any
monitors, burned-out bulbs or cracked or broken housings
or lenses.
Overall of Engine Condition - Check
