Komatsu WA380-8, Operation & Maintenance Manual

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REMARK
The boom “RAISE” operation and the bucket “TILT” operation can be performed even if the auto-digging is
in operation. When performing the digging work while the priority is given to the productivity, you can per-
form the “RAISE” or “TILT” operation more quickly by operating the work equipment control lever.
PRECAUTIONS FOR OPERATION
PERMISSIBLE WATER DEPTH
When operating the machine in water or on swampy ground,
do not move it to a place where the water depth is beyond the
permissible level (up to the bottom surface of axle housing (1)).
After finishing the operations, wash the machine and lubricate
the parts that have been exposed to water.
If the brake creaks, change all of the axle oil.
IF BRAKE DOES NOT STOP MACHINE MOVE
If the machine is not stopped by depressing the brake pedal, use the parking brake to stop the machine.
NOTICE
If the parking brake was used as a secondary brake, ask your Komatsu distributor to inspect the park-
ing brake system for any trouble.
PRECAUTIONS WHEN TRAVELING ON SLOPES
LOWER CENTER OF GRAVITY WHEN STEERING MACHINE
When turning the machine on a slope, lower the work equipment to lower the center of gravity before turning.
Turning on a steep slop is dangerous and, thus, prohibited.
TRAVEL DOWNHILL
Directional lever or directional selector switch (if equipped) must not be set to NEUTRAL position (N) while trav-
eling or traveling downhill. Set the direction of directional lever or directional selector switch (if equipped) in the
traveling direction of the machine.
• It is dangerous that the engine brake is disabled and the steering wheel becomes heavier.
• The transmission and other parts of the power train may be damaged, and it may cause serious personal
injury or death.
If you use the foot brake too frequently during downhill travel, the brake may be overheated and damaged.
Set the gear speed switch to a lower gear speed, turn OFF the transmission cut-off function, and drive the ma-
chine with engine brake applied effectively.
If the brake oil temperature caution lamp lights up because of frequent use of the brake, take proper actions
according to “BRAKE OIL TEMPERATURE CAUTION LAMP (3-21)” in EXPLANATION OF COMPONENTS.
If the gear speed switch is not shifted to the appropriate gear, the torque converter oil may be overheated. In
such case, shift down 1 gear range and reduce the oil temperature.
If the gauge does not enter the green range even at 1st speed, stop the machine, return the directional lever to
NEUTRAL position (N) and run the engine at medium speed until the gauge enters the green range.
ACTIONS IF ENGINE STOPS
If the engine stops on a slope, apply the parking brake immediately, lower the work equipment and stop the ma-
chine. Set the directional lever to NEUTRAL position (N), and start the engine again.
OPERATION MACHINE OPERATIONS AND CONTROLS
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