Komatsu PC45MR-30403, Operation And Maintenance Manual

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PRECAUTIONS FOR CHECK AND MAINTENANCE
PRECAUTIONS FOR WELDING
Welding operations must always be performed by a qualified welder and in a place equipped with proper equip-
ment. There is a hazard of gas, fire, or electric shock when performing welding, so never allow any unqualified
person to perform welding.
HANDLE BATTERY
Starting switch should be always in OFF position when testing the battery or handling it.
When the machine is equipped with the battery disconnect switch, turn the starting switch to OFF position and,
after checking that the system operating lamp is not lit, set the battery disconnect switch key to OFF position,
and pull it out.
Danger of battery exploding
When the battery is being charged, flammable hydrogen gas is generated and may explode. In addition, the bat-
tery electrolyte includes dilute sulphuric acid. Any mistake in handling may cause serious personal injury, explo-
sion, or fire, so always observe the following.
• Do not use or charge the battery if the battery electrolyte is below LOWER LEVEL mark. This may cause
an explosion. Always perform periodic inspection of the battery electrolyte level, and add purified water
(such as a commercial battery fluid) to UPPER LEVEL mark.
• Do not use a dry wipe to clean the battery. A wet wipe will prevent fire or explosion from static electricity.
• Do not smoke or bring any open flame close to the battery.
• Hydrogen gas is generated when the battery is being
charged, so remove the battery from the machine, take it
to a well-ventilated place, remove the battery caps, then
perform the charging.
• After charging, tighten the battery caps securely.
Danger from dilute sulphuric acid
When the battery is being charged, flammable hydrogen gas is
generated and may explode. In addition, the battery electrolyte
includes dilute sulphuric acid. Any mistake in handling may
cause serious personal injury, explosion, or fire. Always ob-
serve the following.
• When handling the battery, always wear protective eye-
glasses and rubber gloves.
• If battery electrolyte gets into your eyes, immediately wash
your eyes with large amounts of fresh water. After that, get
medical attention immediately.
• If battery electrolyte gets on your clothes or skin, wash it
off immediately with large amounts of water.
Danger of sparks
Sparks may be generated and they can cause a fire. Always observe the following.
• Do not let tools or other metal objects make any contact between the battery cables. Do not leave tools
lying around near the battery.
• Turn the starting switch to OFF position, wait for approximately 2 minutes, remove the earth side terminal
((-) terminal side) first, and remove the battery terminal.
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SAFETY PRECAUTIONS FOR MAINTENANCE
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