Battery charging system
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Warning
To check the battery charging system for faults, use the DDS diagnosis instrument and follow the instructions given in the
paragraph, “
Checking the battery charging system“ (Sect. 6 - 2).
The absolute value of voltage measured across the terminals of two of the three yellow cables (the measured value will be
the same whichever combination of cable is used) must be within the range indicated in the table below.
(Ambient temperature: 20 °C)
Important
Before testing, disconnect the alternator wiring from the electric system when the ignition key is set to OFF.
Engine rpm 2000 6000
V effective 27±10 78±10
Values significantly lower than those indicated above can be due to:
-partially demagnetised rotor;
-short-circuited windings.
In the above cases the whole alternator assembly (rotor and stator) should be renewed.
If checks have a favourable outcome, reconnect the alternator to the regulator with ignition key on OFF. Make sure that
no cables are damaged or disconnected.
Removal of the alternator
Disconnect the cables of the generator-side electric system (refer to the paragraph “
Routing of wiring on frame”, Sect. 6 -
1).
Operations Section reference
Drain the engine oil 4 - 3,
Changing the engine oil and
filter cartridge
Remove the gearchange control 7 - 9,
Removal of the gearchange
control
Remove the clutch transmission
unit
7 - 8.2,
Removal of the clutch
transmission unit
Undo the screws (D) and remove the sprocket cover (C).
Remove the generator cover, the stator (A) and the rotor (B) (Sect. 9 - 8, Removal of the generator cover).
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