Komatsu WA380-6 Operation & Maintenance Manual page 230

OPERATION
PRECAUTIONS FOR CHARGING BATTERY
When charging the battery, if the battery is not handled correctly,
there is danger that the battery may explode. Always follow the
instructions in "BATTERY (PAGE 3-165)" and the instruction
manual accompanying the charger, and do as follows.
Do not use or charge the battery if the battery electrolyte level is
below the LOWER LEVEL line. This may cause an explosion.
Check the battery electrolyte level periodically and add distilled
water to bring the electrolyte level to the UPPER LEVEL line.
Set the voltage of the charger to match the voltage of the battery
to be charged. If the correct voltage is not selected, the charger
may overheat and cause an explosion.
Connect the positive (+) charger clip of the charger to the positive (+) terminal of the battery, then connect the
negative (-) charger clip of the charger to the negative (-) terminal of the battery. Be sure to attach the clips
securely.
Set the charging current to 1/10 of the value of the rated battery capacity; when carrying out rapid charging, set
it to less than the rated battery capacity.
If the charger current is too high, the electrolyte will leak or dry up, and this may cause the battery to catch fire and
explode.
If the battery electrolyte is frozen, do not charge the battery or start the engine with a different power source.
There is a danger that this will ignite the battery electrolyte and cause the battery to explode.
STARTING ENGINE WITH BOOSTER CABLE
When starting the engine with a booster cable, do as follows:
PRECAUTIONS WHEN CONNECTING AND DISCONNECTING BOOSTER CABLE
When connecting the cables, never contact the positive (+) and negative
(-) terminals.
When starting the engine with a booster cable, wear safety glasses and
rubber gloves.
Be careful not to let the normal machine and problem machine contact
each other. This prevents sparks from generating near the battery which
could ignite the hydrogen gas given off by the battery.
Make sure that there is no mistake in the booster cable connections.
The final connection is to the engine block of the problem machine, but
sparks will be generated when this is done, so connect to a place as far
as possible from the battery.
When disconnecting the booster cable, take care not to bring the clips
in contact with each other or with the machine body.
NOTICE
The size of the booster cable and clip should be suitable for the battery size.
The battery of the normal machine must be the same capacity as that of the engine to be started.
Check the cables and clips for damage or corrosion.
Make sure that the cables and clips are firmly connected.
Check that the work equipment lock levers and parking brake levers of both machines are in the LOCK position.
Check that each lever is in the NEUTRAL position.
WARNING
TROUBLESHOOTING
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