Alfa Romeo alfa 33 Workshop Manual page 149

2. Rotor winding continuity test
Ser the tester to the AL x 1 scale.
Put the prods on the slip rings.
Winding resistance should be:
Bosch alternator 4 f 0.1 a
Marelli alternator 3.1 * 0.2 CL
Ducellier alternator 6.5 k 0.2 a
(4) If there is no electrical con-
tinuity, put in a new rotor.
3. Rotor insulation test
(1) Set the tester to the a x 1 scale.
(2) Put one prod on a slip ring and
the other prod on the rotor core.
(Repeat for the other slip ring).
(3.) The tester should show no sign
May 7983
IGNITION, STARTING, CHARGING SYSTEM
(4) If the insulation is broken, put
in a new rotor.
4. Stator windings insulation test
(2) Put one prod on the stator pack
and the other prod on the termi-
nals 0 of the first phase, then of
the second phase, and finally of the
third phase.
(3) The tester should show no sign
of current flow.
P h a s e t e r m i n a l s
I
(4) If there is insufficient insulation,
put in a new sTator.
5. Stator windings continuity test
(1) Set the tester to the a x 100
scale.
(2) Test for electrical continuity
between: 1-2, 1-3, 2-3.
(3) In each case the tester should
show current flow.
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(4) If there is no continuity in the
windings, put in a new stator.
6. Brush wear inspection
( 1 ) T h e b r u s h e s i n t h e v o l t a g e
regulator should not be chipped or
dirty with carbon deposits; their
lengths should be within the pre-
scribed limits.
Brush projection min.
5 mm (0.197 in)
(2) In case of excessive
unsolders the brush cable as shown in
t h e i l l u s t r a t i o n a n d p u t i n n e w
brushes.
6-2. Ducellier Alternator and Mare//i
should not be chipped or dirty with
carbon deposits; their lengths should
be within the prescribed limits.
Brush length min.
Ducellier Alternator 6 mm (0.236 in)
Marelli Alternator 7 mm (0.275 in)
(2) In case if excessive brush wear,
put in new brushes: the one by
i t f r o m
simply withdrawing
other by withdrawing it after un-
screwing its securing screw.
wear,
its