
SEBU7494-06 119
Maintenance Section
Engine Starting with Jump Start Cables
i01752164
Engine Starting with Jump
Start Cables
SMCS Code: 1000; 7000
Batteriesgiveoffflammablefumesthatcanex-
plode resulting in personal injury.
Prevent sparks near the batteries. They could
cause vapors to explode. Do not allow the jump
start cable ends to contact each other or the
machine.
Do not smoke when checking battery electrolyte
levels.
Electrolyte is an acid and can cause personal in-
jury if it contacts skin or eyes.
Always wear eye protection when starting a ma-
chine with jump start cables.
Improper jump start procedures can cause an ex-
plosion resulting in personal injury.
Always connect the positive (+) to positive (+) and
the negative (−)tonegative(−).
Jump start only with an energy source with the
same voltage as the stalled machine.
Turn off all lights and accessories on the stalled
machine. Otherwise, they will operate when the
energy source is connected.
NOTICE
To prevent dama
ge to engine bearings and to elec-
trical circuits when you jump start a machine, do not
allow the stalled machine to touch the machine that is
used as the ele
ctrical source.
Severely discharged maintenance free batteries do
not fully rech
arge from the alternator after jump start-
ing. The batteries must be charged to proper voltage
with a battery charger. Many batteries thought to be
unusable are
still rechargeable.
Use only equal voltage for starting. Check the battery
and starter v
oltage rating of your machine. Use only
the same voltage for jump starting. Use of a welder
or higher voltage damages the electrical system. This
machine has a
12 volt starting system. Use only the
same voltage for jump starting.
Refer to Spe
cial Instruction, SEHS7633, “Battery Test
Procedure” available from your Caterpillar dealer, for
complete testing and charging inform ation.
1. Determine the reason that the engine will not
crank. The Caterpillar Electronic Technician
(ET) can be
used to aid in troubleshooting if the
machine is equipped with the auxiliary hydraulic
control module.
2. Engage the parking brake. Lower the work tools to
the ground. Refer to Operation and Maintenance
Manual, “E
quipment Lowering with Engine
Stopped”. Move all control levers to the HOLD or
NEUTRAL position.
3. Turn the engine start switch to the OFF position
and turn all accessory switches to the OFF
position
.
4. Move the machine that is being used as an
electric
al source near the stalled machine so that
the jump start cables reach the stalled machine.
Do not allow the machines to contact each
other.
5. Stop the engine of the machine that is being
used as a
n electrical source. If you are using
an auxiliary power source, turn off the charging
system.
6. Ensure that battery caps on both machines are
tight and correctly placed. Ensure that batteries in
the sta
lled machine are not frozen.
7. Connect the positive jump start cable to the
positi
ve cable terminal of the discharged battery.
Do not allow the positive cable clamps to contact
any met
al except for the battery terminals.