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ALTERNATOR AND REGULATOR
8-33
shield. If the rotor assembly or insulated brush is not
grounded, the lamp will not light.
(2) If the lamp lights, remove the insulated brush
assembly (noting how the parts are assembled) and
separate the end shields by removing the three thru
bolts.
(3) Again test by placing one of the test prods to a
slip ring and the remaining test prod to the end
shield. If the lamp lights, the rotor assembly is
grounded and requires replacement. If the lamp does
not light after removing the insulated brush and sep-
arating the end shields, the cause of the ground at
the first ground test was that the insulated brush is
grounded.
(4)
Examine the plastic insulator and the screw.
The screw is a special size and must not be substituted
with another size.
(5) Install the insulated brush holder, terminal, in-
sulated washer, shake proof washer and screw. If the
parts were not assembled in this order or if the wrong
screw was used this could be the cause of the ground
condition.
DISASSEMBLING THE ALTERNATOR
To prevent possible damage to the brush assem-
blies, they should be removed before proceeding with
the disassembly of the alternator. The insulated brush
is mounted in a plastic holder that positions the brush
vertically against one of the slip rings.
(1) Remove the retaining screw lockwasher, insu-
lated washer, and field terminal, and carefully lift
the plastic holder containing the spring and brush as-
sembly from the end housing, (Fig.
15).
(2) The ground brush is positioned horizontally
against the remaining slip ring and is retained in a
holder that is integral with the end shield. Remove
the retaining screw and lift the clip, spring and brush
INSULATED
I
b"
6 2 x 1 0 6
Fig. 15-Removing
or Installing Insulated Brush
GROUND BRUSH ASSEMBLY
/
"VP
Fig. 1 &Removing
Or Installing Ground Brush
assembly from the end shield, (Fig.
16).
CAUTION: Stator is laminated, do not burr stator
or end shield.
(3) Remove the through bolts and pry between the
stator and drive end shield with the blade of a screw-
driver, Fig.
17.
Carefully separate the drive end
shield, pulley and rotor assembly away from the sta-
tor and rectifier shield assembly.
Testing the Rectifiers with Tool C-3829
The Rectifier Tester Tool C-3829 provides a quick,
simple and accurate method to test the alternator
rectifiers without the necessity of disconnecting the
soldered rectifier leads. With the alternator recti-
fier end shield separated from the drive end housing
proceed with rectifier tests as follows:
Positive Case Rectifier Test Wig. 18)
(a) Place the alternator on an insulated surface.
DRIVE END
RECTIFIER END
Fig. 17-Separating
Drive End Shield
from Stator
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