Removal And Replacement Of Components And Component Assemblies; Extracting And Inserting The Rotor; Changing Bearing; Changing Rotating Diodes - Sincro FB2 MB Manual Del Usuario

7.4 Removal and replacement of components
and component assemblies

7.4.1 Extracting and inserting the rotor

The following procedures presume the alternator has been
separated from the engine.
Dual bearing (B3 B14), cone version and SAE single
bearing version.
• Remove the tap and hammer the back of the rotor, (for B3
B14 version, unscrew the four M10 nuts that fasten the
flange to alternator) so that the bearing comes free.
• Lift the rotor with a belt on the coupling side.
• Continue to drive the rotor out of the stator, gradually
adapting the sling so that the winding is not damaged.
Insert the rotor following in reverse the instructions at section
7.4.1.
When the rotor is repositioned, the alternator may loose
the residual magnetism that enables it to self-excite. Before
restart of the generating set the alternator can be excited
by applying a 6-12 volt current across the exciter terminals
for a second, respecting the polarities (while engine doesn't
working or while engine running).

7.4.2 Changing bearing

See section 7.4.1
• Remove the seeger ring (R).
• Remove the bearing or bearings (B) using a standard
extractor.
• Take the new bearing or bearings and heat them (max.
100 ÷ 110°C) so their diameter dilates before sliding them
into position on the shaft.
• Replace the seeger ring (R).
• Insert the rotor by following in reverse the instructions at
section 7.4.1.

7.4.3 Changing rotating diodes

• Take out the rotor by following the instructions as at
paragraph 7.4.1
• Remove the seeger ring.
• Remove the bearing or bearings.
• Unscrew the two screws (V) and remove the protection (P).
• Uncrew the five screws (S) of the terminal board by
disconnecting the cables and than remove the "diode
bridge" board.
• Assemble the new "diode bridge" board, connect the cables
through the five screws (S) to the terminal board taking
care to respect the polarities.
• Reassemble the protection (P) and fix the two screws (V).
• Insert again the rotor, by following backwards all
instructions as at paragraph 7.4.1
7.4.4 Replacing components and component
assemblies
When assembling after changing a part repeat the above
operations in reverse.
R
P
V
ENGLISH
B
S
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