Komatsu GD555-5 Operation & Maintenance Manual page 235

TROUBLESHOOTING
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.
CONNECTING THE BOOSTER CABLES
Keep the starting switch of the normal machine and failed machine
in OFF position.
Connect the booster cable as follows, in the order of the numbers
marked in the figure.
1. Connect 1 clip of booster cable (A) to the positive (+) terminal
of the problem machine.
2. Connect the other clip of booster cable (A) to the positive (+)
terminal of the normal machine.
3. Connect 1 clip of booster cable (B) to the negative (-) terminal
of the normal machine.
4. Connect the other clip of booster cable (B) to the engine block
of the problem machine.
3 - 182
WARNING
OPERATION