Komatsu WA380-8, Operation & Maintenance Manual

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• When the bucket is loaded, direct the bucket toward the hill top both in uphill and downhill travel. When
driving the machine with the bucket directing downhill, it is liable to tip over and is dangerous.
METHOD OF USING BRAKES
• Do not put your foot on the brake pedal unnecessarily. If the machine travels with your foot on the brake
pedal, the brake operates constantly and heats abnormally, and is disabled and that can cause an accident.
• Do not depress the brake pedal repeatedly more than necessity.
• Switch on the torque converter lock-up switch and use the engine brake.
• When traveling downhill, use the engine brake while turning the transmission cut-off switch to OFF position.
PRECAUTIONS WHEN OPERATING MACHINE
• When using the machine, to prevent serious personal injury or death caused by the work equipment or by
the machine tipping over due to overloading, do not use the machine beyond the permitted performance of
the machine such as the maximum permitted load for the structure of the machine.
• If the engine cannot be started again after it has stopped, turn the starting switch key to ON position, and
immediately operate the work equipment control levers to lower the work equipment to the ground. (The
accumulator is capable of working only for a limited time after the engine is stopped.)
• Be careful not to approach too close to the edge of cliffs. When making embankments or landfills, or when
dropping soil over a cliff, dump one pile, then use the next pile of soil to push the first pile.
• The load suddenly becomes lighter when the soil is pushed over a cliff or when the machine reaches the
top of a slope. When this happens, there is danger that the travel speed will suddenly increase, so be sure
to reduce the speed.
• When the bucket is fully loaded, do not start, turn, or stop
the machine suddenly. There is danger that the machine
may tip over.
• When handling unstable loads such as round and cylindri-
cal materials, and stacked plates, they may drop onto the
operator's compartment if the work equipment is raised
high, and cause serious personal injury or death.
• When handling unstable loads, be careful not to raise the
work equipment too high or tilt the bucket backward too
much.
• If the work equipment is suddenly lowered or stopped, the
reaction may cause the machine to tip over. Particularly
when carrying a load, be sure to operate the work equip-
ment carefully.
• When performing the operation in tunnels, under bridges,
under electric wires, or other places where the height is
limited, be extremely careful not to let the work equipment
etc. hit anything.
• To prevent accidents caused by hitting other objects, al-
ways operate the machine at a speed which is safe for op-
eration, particularly in confined spaces, indoors, and in pla-
ces where there are other machines.
SAFETY PRECAUTIONS FOR OPERATION
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