Komatsu WA800-3E0, Operation & Maintenance Manual

Page: 59 / 336

SAFETY
PRECAUTIONS FOR MAINTENANCE
2-37
WORK UNDER THE MACHINE
q
When carrying out inspection and maintenance with the
work equipment raised, use strong support (1) that can
fully withstand the weight of the work equipment, and be
sure to fix the stands in position securely.
NOISE
If the noise from the machine is too loud, it may cause temporary or permanent hearing problems. When carrying
out maintenance of the engine and you are exposed to noise for long periods of time, wear ear covers or ear plugs
while working.
PRECAUTIONS WHEN USING HAMMER
When using a hammer, pins may fly out or metal particles may
be scattered. This may lead to serious injury. Always do as
follows.
q
If hard metal parts such as pins, bucket teeth, cutting
edges, or bearings are hit with a hammer, there is a hazard
that pieces might be scattered and cause injury. Always
wear safety glasses and gloves.
q
When hitting pins or bucket teeth, there is a hazard that
broken pieces might be sent flying and injure people in the
surrounding area. Always check that there is no one in the
surrounding area.
q
There is a hazard that the pin hit with strong force may fly out and injure people in the surrounding area.
REPAIR WELDING
Welding operations must always be carried out by a qualified welder and in a place equipped with proper equip-
ment. There is a hazard of gas, fire, or electrocution when carrying out welding, so never allow any unqualified
personnel to carry out welding.
REMOVING BATTERY TERMINAL
q
When repairing the electrical system or when carrying out electrical welding, remove the negative (-) terminal
of the battery to prevent the flow of current.