Subaru IMPREZA 2002 Service Manual page 319

START1 NG/CHARG I NG SYSTEMS
GENERATOR
6) Remove the brushes by unsoldering at the pig-
tails.
U
G6M0070
7 ) Remove the nut and insulating bushing at termi-
nal B, and remove the rectifier.
S6M0405P
(A) Rectifier
(B) Rear cover
(C) Nut
D: ASSEMBLY
To assemble, reverse the order of disassembly.
1) Pulling up brush:
Before assembling, press the brush down into the
brush holder with your finger and secure in that po-
sition by passing a [2 mm (0.08 in) dia. length 4 to
5 cm (1.6 to 2.0 in)] wire (A) through the hole shown
in the figure.
CAUTION:
Be sure to remove the wire after reassembly.
S6M0411 P
2) Heat the bearing box in the rear bracket [50 to
60°C (122 to 140"F)l and press the rear bearing
into the rear bracket.
CAUTION:
Grease should not be applied for the rear bear-
ing. Remove oil completely if it is found on the
bearing box.
3) After reassembly, turn the pulley by hand to
check that the rotor turns smoothly.
E: INSPECTION
1. DIODE
CAUTION:
Never use a megger tester (measuring use for
high voltage) or any other similar measure for
this test; otherwise, the diodes may be dam-
aged.
1) Checking positive diode:
Check for continuity between the diode lead and
the positive side heat sink. The positive diode is in
good condition if continuity exists only in the direc-
tion from the diode lead to the heat sink.
I
I
S6M0406P
(A) Diode lead
(B) Heat sink (Positive side)
2) Checking negative diode:
Check for continuity between the negative side
heat sink and diode lead. The negative diode is in
good condition if continuity exists only in the direc-
tion from the heat sink to the diode lead.
(A) Diode lead
(B) Heat sink (Negative side)
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