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Page Title:
Figure 6-1. Alternator, exploded view. |
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 1.
Frame assembly
14.
Washer
27.
Gasket
2.
Screw
15.
Nut
28.
Inside collar
3.
16.
Brush
29.
Outside collar
4.
Bearing
17.
Brush holder
30.
Grease slinger
5.
Retainer
18.
Screw
31.
Lock washer
6.
Retaining spring
19.
Spring
32.
Shaft nut
7.
Rotor
20.
Bearing
33.
Capacitor
8.
Stator
21.
Lead
34.
Screw
9.
Clip
22.
Terminal package
35.
Lock washer
10.
Frame
23.
Terminal package
36.
Washer
11.
Heat sink assembly
24.
Terminal
37.
Insulator
12.
25.
Bearing retainer
38.
Key
13.
Terminal package
26.
Screw
Figure 6-1. Alternator, exploded view.
g. Check rotor for opens by connecting a 110 volt test
reading is infinity, stator windings are open; replace
lamp or ohmmeter across the two slip rings. If lamp
fails to light or ohmmeter reading is infinity, field winding
is open and alternator must be replaced.
components are normal and alternator fails to supply its
rated output, it can be assumed that stator is short
h. Check rotor for short circuits by connecting a 12
circuited; replace alternator.
volt battery and ammeter in series with the edges of the
Caution: If ohmmeter is to be used,
two slip rings. Note ammeter reading; it should be 1.0 to
2.3 amperes. An ammeter reading above specified
it should have a 1 1/2 volt cell. Turn
value indicates shorted windings.
voltmeter selector to lowest range
and connect ohmmeter leads to a
and remove stator (8, figure 601) from frame.
Voltmeter will indicate
j. Check stator winding for grounds by connecting
cell voltage. Only a 12 volt test lamp
ohmmeter between each lead and stator frame. If
should be used. A 110 volt test lamp
ohmmeter reading is less than 5 ohms, windings are
will damage components.
Check
grounded. Replace alternator.
diodes with either an ohmmeter or a
k. Check stator leads for opens by connecting
test lamp.
ohmmeter between stator leads in pairs. If ohmmeter
6-2
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