Komatsu D31EX-21, Operation & Maintenance Manual, Page: 39 / 256

SAFETY
PRECAUTIONS FOR OPERATION
2-21
OPERATION 2
CHECKS BEFORE OPERATION
When carrying out the checks, move the machine to a wide area where there are no obstructions, and operate
slowly. Do not allow anyone near the machine.
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Always fasten your seat belt.
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Check the operation of travel, steering and brake systems,
and work equipment control system.
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Check for any abnormality in the sound of the machine,
vibration, heat, smell, or gauges; check also that there is
no leakage of oil or fuel.
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If any abnormality is found, carry out repairs immediately.
PRECAUTIONS FOR MOVING MACHINE FORWARD OR IN REVERSE
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Before travelling, check again that there is no one in the
surrounding area, and that there are no obstacles.
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Before travelling, sound the horn to warn people in the
area.
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Always operate the machine only when seated.
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Do not allow anyone apart from the operator to ride on the
machine.
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Check that the back-up alarm (alarm buzzer when machine
travels in reverse) works properly.
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Fix the operator's compartment doors and windows in posi-
tion securely.
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If there is an area to the rear of the machine which cannot
be seen, position a signal person. Take special care not to
hit other machines or people when turning or swinging the
machine.
Always be sure to carry out the above precautions even when
the machine is equipped with mirrors.
PRECAUTIONS WHEN TRAVELING
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When traveling on level ground, keep the work equipment
at a height of 40 to 50 cm from the ground.
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When traveling on rough ground, travel at low speed and
do not operate the steering suddenly. There is danger that
the machine may turn over. The work equipment may hit
the ground surface and cause the machine to lose its bal-
ance, or may damage the machine or structures in the
area.