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as the
as the
required,
required,
bl bly y is is
serviced separately.
serviced separately.
not
not
(7) Remove the output battery terminal nuts and
(7) Remove the output battery terminal nuts and
washers and remove terminal screw and inside capac-
washers and remove terminal screw and inside capac-
itor (on units so equipped) as shown in Figure 15.
itor (on units so equipped) as shown in Figure 15.
The heat sink is also held in place by the terminal
The heat sink is also held in place by the terminal
screw.
screw.
(8) Remove the insulator (Fig. 16).
(8) Remove the insulator (Fig. 16).
NOTE: Three rectifiers are pressed into the
NOTE:
Three rectifiers are pressed into the
sink and three in the end shield
sink and three in the end shield (Fig. 5).
heat
heat
removing the rectifiers, it is
removing the rectifiers, it is
When
When
to support the end shield and/or heat sink to
to support the end shield and/or heat sink to
prevent damage to these castings.
prevent damage to these castings.
7. TESTING THE RECTIFIERS AND
7. TESTING THE RECTIFIERS AND STATOR
( ( 1) Disassemble the alternator as outlined in Para-
1) Disassemble the alternator as outlined in Para-
graph
graph
and separate the wires at the
and separate the wires at the "Y"
16 16
at the stator (Fig. 17).
at the stator (Fig. 17).
(2) Test the rectifiers with a test lamp equipped
(2) Test the rectifiers with a test lamp equipped
with a number 67 bulb (4 candle power) as follows:
with a number 67 bulb (4 candle power) as follows:
balance of the rotor assem-
balance of the rotor
assem-
(Fig. 5).
necessary
necessary
STATOR
"Y" connection
connection
- -
'ELECTRICAL-INSTRUMENTS
'ELECTRICAL-INSTRUMENTS
ig.
ig. 17Separate
17Separate Stator
Stator and End Shield to Expose
and End Shield to Expose
"Y
"Y' ' Connector
Connector
Connect one side of test lamp to the positive bat-
Connect one side of test lamp to the positive
post. Connect the other side of the test lamp to
post. Connect the other side of the test lamp to
,st ,st probe. Connect another test probe to the neg-
probe. Connect another test probe to the neg-
e e battery post.
battery post.
Contact the outer case of the rectifier with one
Contact the outer case of the rectifier with one
re re and the other probe to the wire in the center of
and the other probe to the wire in the center of
rectifier (Fig. 16).
rectifier (Fig. 16).
Reverse
Reverse -the
-the probes, moving the probe from the
probes, moving the probe from the
ifier outer case to the rectifier wire and the probe
ifier outer case to the rectifier wire and the probe
le rectifier wire to the rectifier outer case.
le rectifier wire to the rectifier outer case.
the test lamp lights in one direction but does not
the test lamp lights in one direction but does not
t in the other direction, the rectifier is satisfactory.
t in the other direction, the rectifier is satisfactory.
:mp lights in both directions, the rectifier is shorted.
:mp lights in both directions, the rectifier is shorted.
+st +st
lamp does not light either direction, the
lamp does not light either direction, the recti-
is open.
is open.
iOTE:
iOTE:
The usual
The usual
cause of
cause of
Irted
Irted
rectifier is a defective capacitor or a
rectifier is a defective capacitor or a
,tery
,tery
that has
that has
installed in reverse
installed in reverse
been
been
DRIVE END
DRIVE END
SHIELD
SHIELD
bat-
recti-
an open or
an open or
a a
po-
po-
41
41
DRIVER (T O O O O L) L)
DRIVER (T
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