Komatsu HD785-5, Operation & Maintenance Manual

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SAFETY
PRECAUTIONS FOR MAINTENANCE
HANDLING SUSPENSION CYLINDER
The suspension cylinder is charged with high-pressure nitrogen gas. If any mistake is made in handling, it may lead
to serious injury. To prevent this, always do as follows.
Do not remove or disassemble the cylinder.
Do not bring it near flame or dispose of it in fire.
Do not make holes in it, weld it, or use a cutting torch.
Do not bear any shock by hammering, rolling or similar activity.
Ask for your Komatsu distributor when sealing gas into the cylinder or releasing gas from it.
PERSONNEL
Only authorized personnel can service and repair the machine. Do not allow unauthorized personnel into the area.
If necessary, employ an observer.
WORK UNDER THE MACHINE
If it is necessary to go under the machine when it is raised in
order to carry out service or maintenance, support the machine
securely with blocks and stands strong enough to support the
weight of the machine.
When carrying out inspection with the dump body raised, always
set the dump lever to the HOLD position, and lock it in position,
then insert the safety pin securely. When you use safety pin, see
"SAFETY PIN (PAGE 3-35)".
NOISE
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.
If the noise from the machine is too loud, it may cause temporary or permanent hearing problems.
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.
If hard metal parts such as pins, and bearings are hit with a
hammer, there is danger that small pieces will fly off; this may
lead to seious injury. Wear protective glasses, hard hat, and
other protective equipment.
If pins are hit with a hammer, there is a hazard that the metal
particles may fly out and injure people in the surrounding area.
Always make sure that no one is in the surrounding area before
using the hummer.
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 equipment.
There is a hazard of gas, fire, or electrocution when carrying out welding, so never allow any unqualified personnel
to carry out welding.
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