A CAUTION!
The diode rectifiers
should
never be checked
by a voltage
higher
than
75
V because in
this
case the diodes
will
be damaged.
SERVICE INSTRUCTIONS
Do
not
attempt
to
repair the
components
of
the
alternator. Replace them. The replacement
of
many
components
can
be
done
without
dismantling
the
alternator
completely.
The
following
instructions
cover
disassembly
and
assembly
of
the alternator.
RECTIFIER DIODE REPLACEMENT
Damaged diodes (open
or
short-circuited) cannot
26 25
23
54
39
30
be replaced in
aluminum
holders.
When one
or
a
few
diodes
are damaged, replace
the
respective diode-holder
unit
(positive
or
negative)
complete.
ALTERNATOR DISASSEMBLY
Dismantle the
alternator
as follows:
-loosen
nut
(54,
Fig.
0.1112
and
0.1113)
remove
pulley
(1)
and fan
(23)
and the key
(47)
-remove
the sub-assembly brush-holder
(32)
slackening the diode end plate retaining
screws
(45).
-unscrew
the three through-bolts
(4)
connect·
ing the
two
end plates. (Fig.
0.1113).
10
FIG. 0.1/12 ALTERNATOR
1.
Pulley;
2.
Insulating bushing;
3.
Band bushings;
4.
Mounting
bolt;
5.
Sq.
nut;
6.
Lock plate;
7.
Supporting
plate;
8.
Insulating bushing;
9.
Lock plate; 10. Diode-holder
(-
);
11. Negative diode;
12.
Diode-holder ( +
);
13. Positive diode; 14. Nut; 15. Washer; 15, 17. and 18. Screw; 19. Nut;
20.
Hood;
21.
Terminal insulation;
22.
Screw Insulation;
23.
Fan;
24.
End shield;
25.
Securing plate; 26. Bearing;
27.
Lockwasher;
29.
Stator
winding;
30.
Shield
with
ring;
31.
Seal; 32. Brush-holder;
33.
Plate; 34,
35.
Seal;
36.
Flat plug;
37.
Brush;
39.
Rotor winding; 40. Washer; 42. Nut; 43. Lockwasher;
44.
Nut; 45. Screw;
46.
Washer;
47.
Key;
48.
Lockwasher;
49,
50,
51. Washer;
52.
Lockwasher;
53.
Screw;
54.
Nut
Electrical System · 193
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