BA ET18, 20, 24 en* 1.5 * et18_20_24i400.fm 4-41
Putting into operation 4
Jump-starting the engine
Explosion hazard in case of incorrect handling of battery!
Can cause serious injury or death.
► Never jump start the engine if the battery is frozen. Dispose of a frozen
battery.
► In order to avoid electrical short-circuit or overvoltage, the battery
jumper cable connected on the positive terminals of the batteries must
never be brought into contact with electrically conductive vehicle parts.
► The vehicles must not touch each other during the starting aid.
► The voltage of the auxiliary power supply must be 12 V; higher voltage
will damage the electrical system of both vehicles.
► Use only authorized battery jumper cables which conform to the safety
requirements and which are in perfect condition.
► Route the battery jumper cables so they cannot catch on rotating
components in the engine compartment.
► Do not lean over the battery.
► Keep ignition sources away from the battery.
1. Drive the jump-starting vehicle close enough to the machine so that the
battery jumper cables can reach to connect both batteries.
2. Let the engine of the jump-starting vehicle run.
3. First connect one end of the red battery jumper cable (+) to the positive
terminal of the empty battery, then connect the other end to the
positive terminal of the starting battery.
4. Connect one end of the black battery jumper cable (−) to the negative
terminal of the starting battery.
5. Connect the other end of the black battery jumper cable (−) to a solid
metal component fimly screwed on the engine block or onto the engine
block itself.
➥ Do not connect it to the negative terminal of the empty battery, as
otherwise explosive gas emerging from the battery can ignite if
sparks are formed.
6. Start the engine of the machine with the empty battery.
Once the engine has started:
• With the engine running, disconnect both battery jumper cables in the
reverse order.
In order to avoid sparking, first disconnect the battery jumper cable on the
negative terminal, then the battery jumper cable on the positive terminal.
Fig. 109Overview
Starting
battery
Empty battery
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