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TM 10-3930-671-10
Emergency Starting
How To Use Battery Jumper Cables
These instructions apply to the use of a 12-volt lift truck with a fully-charged battery to start the engine of a lift truck with a
discharged battery.
To avoid damage to the lift truck and battery, or the possibility of harm to yourself, follow these instructions and warnings.
If you have any doubts, check with unit maintenance.
CAUTION
Use only a 12-volt jumper system.
You can permanently damage a 12-
volt
starting
motor
and
ignition
system by connecting it to a 24-volt
power supply (two 12-volt batteries in
series, or a 24-volt generating set).
1.
This truck has two 12-volt batteries in parallel
and a negative ground electrical system. Make
sure that the other truck also has a 12-volt
battery and negative ground system. If you are
not sure of the voltage, or if the ground is
different, do not try to jump start, as personal
injury or damage to the electrical system can
result.
NOTE
If the truck has a battery with
terminals on the side, you will need a
set of jumper cables with matching
connector clamps, or cable adapters
for side-mounted battery terminals.
2.
If the discharged battery has filler caps, check
the fluid level. Do not use an open flame to
check and do not smoke. If low, add distilled
water to the correct level. Be sure to install the
caps before jump starting. Do not jump start,
charge, or test a sealed-type battery if the test
indicator looks illuminated or had a bright color.
Install a new battery.
3.
Put the truck with the booster battery as near to
the other truck as necessary for the jumper
cables to reach both batteries. Check and make
sure that the trucks do not touch each other.
Use particular care when connecting a booster battery to
prevent sparks.
WARNING
The battery contains corrosive acid
which can cause injury. If acid
contacts your eyes or skin, flush
immediately
with
water
and
get
medical assistance.
Batteries contain sulfuric acid. Avoid contact with skin,
eyes, or clothing. Also, shield your eyes when working
near the battery to protect against possible splashing of
the acid solution.
WARNING
Do not smoke or have open flames or
sparks in battery charging areas or
near batteries. An explosion can
result and cause injury or death.
Hydrogen and oxygen gases are produced during normal
battery operation. This gas mixture can explode if
flames, sparks, or lighted tobacco are brought near the
battery. When charging or using a battery in an enclosed
space, always provide ventilation and shield your eyes.
Wear safety glasses when working around batteries.
E-86
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