Service and maintenance
130 Electrical system
Starting with booster batteries
IMPORTANT! The booster batteries or another power source
must have the same rated voltage as the batteries on the
machine.
NOTE! Under no circumstances may a switched-on battery
charger be connected to the batteries on the machine when
an attempt at starting the engine is made, as this may damage
the electronic system in the machine.
1 Turn off the battery disconnect switch.
2 Remove the protections from the battery pole studs.
3 Connect two 12 V batteries in series.
4 Connect one of the jump-start cables between the (+) terminal
on the machine's battery and the (+) terminal on the booster
battery.
5 Connect the other jump-start cable between the (–) terminal on
the booster battery and a grounding point on the machine
according to the adjacent figure.
6 Connect the machine's batteries by turning on the battery
disconnect switch.
7 Wait for a couple of minutes and then start the engine with the
start key in the cab.
8 When the engine has started, first disconnect the jump-start
cable from the grounding point on the machine, then
disconnect the other end of the jump-start cable from the (–)
terminal on the booster battery.
9 Then disconnect the jump-start cable between the (+)
terminals.
10 Reinstall the insulating caps on the battery terminals.
Welding
NOTE! Before carrying out any electric welding on the
machine, all connectors must be disconnected from all ECUs.
Q The current must be disconnected with the battery disconnect
switch.
Q The battery cables must be disconnected from the battery
terminals' studs.
Q All connectors must be disconnected from all ECUs. When
disconnecting and reconnecting the ECUs, the cables must be
without current (the battery disconnect switch turned off and the
battery cables disconnected).
Q Contact a workshop authorised by Volvo CE for more accurate
information on how to proceed.
WARNING!
Because of current surge the batteries may explode if a
charged battery is connected to a completely discharged
battery and this may cause injuries.
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