Service and maintenance
Electrical system 131
Alternator
Alternator belt
The belt is a flat Poly-V type, with automatic belt tensioning. On
machines with air conditioning, the belt is common to the alternator
and compressor.
NOTE! The belt guard has been removed in the picture.
Check the belt every 2000 hours.
Change belt if any of the belt's ribs is missing.
The alternator unit is sensitive to incorrect connection, therefore,
always follow the instructions below.
Disconnecting
Q Battery and alternator cables must not be disconnected when
the engine is running. Malfunctions may occur in the alternator
and the electronics.
Q Disconnect and insulate the battery cables before doing any
work on the alternator equipment.
Battery connection
Q The battery's connection terminals must absolutely not be
confused. Each terminal stud has a stamped (+) or (–)
character. If the cables are connected incorrectly, the
alternator's rectifier will be destroyed immediately.
Q When disconnecting the battery, turn off the current with the
battery disconnect switch.
Electrical distribution box
The machine has an electrical distribution box in the cab on the left
cab wall. The electrical distribution box contains most of the
machine's fuses and relays, see page 177.
If a malfunction should occur in one of the relays, this can be
solved temporarily by replacing the defective relay with one that
has a less important function. The relays are identical and
interchangeable.
WARNING!
Q Never install a fuse with a higher rating than that given on
the decal (there is a risk of damage or fire on the circuit
board).
Q If the same fuse is triggered repeatedly, the cause must
be investigated.
1
7
1
A
B
A Alternator
B Compressor
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