Ducati Diavel Workshop Manual page 182

Battery charging system
Engine speed
V effective (idle speed)
V effective (nominal)
V effective (maximum)
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
Operations
Drain the cooling system
Remove the front sprocket cover
Drain the engine oil
Remove the clutch pushrod
Remove the pump-cylinder hoses
Remove the water pump-radiator
hose
Disconnect the cables of the alternator-side electric system (Sect. 6 -1,
Remove the generator cover, the stator (A) and the rotor (B) (Sect. 9 - 8,
Refitting the generator
Fit the rotor (B), the stator (A) and the alternator-side crankcase cover.
Connect the cables of the generator side electric system (refer to the table in chapter
Sect. 6 - 1).
1500 2500
25.9 43
28.3 46.7
30.3 50.0
Section reference
4 - 3, Changing the coolant
7 - 14, Removing of the front
sprocket
4 - 3, Changing the engine oil and
filter cartridge
7 - 8.2, Removal of the clutch
transmission unit
9 - 5, Removal of the
cylinder/piston assembly
9 - 3.3, Removal of the water pump
Routing of wiring on frame).
Removal of the generator
"Routing of wiring on
cover).
frame",