Komatsu H70051 Series Operation & Maintenance Manual page 305

OPERATION
START ENGINE WITH JUMPER CABLES
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• Never connect the positive (+) and negative (-) termi-
nals when connecting the cables.
• Wear the protective eyeglasses and rubber gloves al-
ways when starting the engine by using the jumper ca-
ble.
• Do not bring the normal machine into contact with the
failed machine.
The sparks caused near the battery could ignite the
hydrogen gas generated from the battery, so be care-
ful not to let it happen.
• Make sure that there is no mistake in the jumper cable
connections. When the final connection of the cables
is done to the engine block of the failed machine,
sparks will be generated. So, connect to a place as far
as possible from the battery.
• When disconnecting the jumper cable, take care not to
bring the clips in contact with each other or with the
machine.
• Never start the engine by short-circuiting the starting
motor (jump start).
NOTICE
• Use the jumper cables and clips that corresponds the battery size.
• The battery of the normal machine must be the same capacity as that of the failed machine.
• Check the cables and clips for damage or corrosion.
• Make sure that the cables and clips are firmly connected.
• Check that the work equipments of both machines are locked (the pilot lamps are lit) or the parking
brake switches are in LOCK position.
• Check that each lever is in NEUTRAL position.
• To prevent damage of the electric devices of the failed machine, turn the starting switch of the failed
machine to OFF position, check that the system operating lamp is not lit, and then turn the battery
disconnect switch key to OFF position and remove it before connecting the jumper cable.
For the operating method of the battery disconnect switch, see "BATTERY DISCONNECT SWITCH
(3-119)".
PROCEDURE FOR CONNECTING JUMPER CABLES
Turn the starting switch and battery disconnect switch of the failed machine, and the starting switch of the nor-
mal machine to OFF position.
1.
Connect the clip of jumper cable (A) to the positive (+) ter-
minal of battery (C) on the failed machine.
2.
Connect the clip at the other end of jumper cable (A) to the
positive (+) terminal of battery (D) on the normal machine.
3.
Connect the clip of jumper cable (B) to the negative (-) ter-
minal of battery (D) on the normal machine.
4.
Turn the battery disconnect switch (S) of the failed ma-
chine to ON position.
5.
Connect the clip at the other end of jumper cable (B) to en-
gine block (E) of the failed machine.
WARNING
TROUBLES AND ACTIONS
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