Routine Maintenance
Electrical System
128 128
9811/5700-7
Fig 91.
Jump Starting the Engine
T3-092
!MWARNING
Do not use a battery if its electrolyte is frozen. To
prevent the battery electrolyte from freezing, keep the
battery fully charged.
Do not try to charge a frozen battery or jump-start and
run the engine, the battery could explode.
Batteries produce a flammable gas, which is
explosive; do not smoke when checking the
electrolyte levels.
When jump-starting from another vehicle, make sure
that the two vehicles do not touch each other. This
prevents any chance of sparks near the battery.
Set all the machine switches to their OFF positions
before connecting the external power supply. Even
with the starter switch set to off some circuits will be
energised when the external power supply is
connected.
Do not connect the booster (slave) supply directly
across the starter motor. Doing this by-passes the
neutral gear safety switch. If the machine is in gear, it
may 'runaway' and kill or injure bystanders.
Use only sound jump leads with securely attached
connectors. Connect one jump lead at a time.
The machine has a negative earth electrical system.
Check which battery terminal is positive (+) before
making any connections.
Keep metal watch straps and jewellery away from the
jump lead connectors and the battery terminals - an
accidental short could cause serious burns and
damage equipment.
Make sure you know the voltage of the machine. The
booster (slave) supply must not be higher than that of
the machine. Using a higher voltage supply will
damage your machine's electrical system.
If you do not know the voltage of your booster (slave)
supply, then contact your JCB dealer for advice. Do
not attempt to jump-start the engine until you are sure
of the voltage of the booster (slave) supply.
4-2-2-3_1
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