Komatsu WA380-8, Operation & Maintenance Manual

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inspection or maintenance of the fuel piping system, stop the engine and wait for at least 30 seconds to allow
the internal pressure to go down before starting the work.
HANDLE HIGH-PRESSURE HOSES AND PIPING
If oil or fuel leaks from high-pressure hoses or piping, it may cause fire or defective operation. It is dangerous
and may cause serious personal injury or death. If the hose or piping mounts are loose or oil or fuel is found to
be leaking from the mount, stop operations and tighten to the specified torque.
If any damaged or deformed hoses or piping are found, consult your Komatsu distributor.
Replace the hose if any of the following problems are found.
• Damaged hose or deformed hydraulic fitting.
• Frayed or cut covering or exposed reinforcement wire layer.
• Covering swollen in places.
• Twisted or crushed movable portion.
• Foreign material embedded in covering.
PRECAUTIONS FOR NOISE
When performing 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 is too loud, it may cause temporary or permanent hearing problems.
HANDLE ACCUMULATOR AND GAS SPRING
This machine is equipped with an accumulator. For a while after the engine has been stopped, if the work equip-
ment control lever is operated in LOWER direction while the starting switch key is at ON position, the work
equipment goes down with its own weight.
After stopping the engine, turn the work equipment lock switch to LOCK position and the parking brake switch to
ON (operation) position.
The accumulator and gas spring are charged with high-pressure nitrogen gas. If the accumulator is handled
mistakenly, it may cause an explosion. It is dangerous and may cause serious personal injury or death. Always
observe the following.
• Do not disassemble.
• Do not bring it near flame or dispose of it in fire.
• Do not make holes in it, weld it, nor use a cutting torch.
• Do not hit or roll the accumulator, or subject it to any im-
pact.
• When disposing of the accumulator, the gas must be re-
leased. Ask your Komatsu distributor to perform this work.
PRECAUTIONS FOR COMPRESSED AIR
• When performing cleaning with compressed air, there is a hazard of serious personal injury or death
caused by flying dust or particles.
• When using compressed air to clean the filter element or radiator, wear protective eyeglasses, anti-dust
mask, gloves, and other protective equipment.
MAINTENANCE OF AIR CONDITIONER
If air conditioner refrigerant gets into your eyes, it may cause loss of sight; if it contacts your skin, it may cause
frostbite. Never loosen any parts of the cooling circuit.
CHEMICAL HAZARD
During maintenance or dismantling operations, where there is the risk of contact with hazardous chemical sub-
stances, relevant safety precautions should be taken.
PRECAUTIONS FOR MAINTENANCE SAFETY
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