Subaru 2002 IMPREZA Service Manual page 426

STARTING/CHARGING SYSTEMS
6) Remove the brushes by unsoldering at pigtails.
7) Remove the nut and insulating bushing at termi-
nal B, and then remove the rectifier.
(A) Ractifier
(B) Rear cover
(C) Nut
D: ASSEMBLY
To assemble, reverse order of disassembly.
1) Pulling up brush
Before assembling, press the brush down into
brush holder with your finger, and then secure in
that position 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.
GENERATOR
2) Heat the bearing box in rear bracket [50 to 60°C
(122 to 140°F)], and then press the rear bearing
into rear bracket.
CAUTION:
Grease should not be applied to rear bearing.
Remove the oil completely if it is found on bear-
ing box.
3) After reassembly, turn the pulley by hand to
check that rotor turns smoothly.
E: INSPECTION
G6M0070
1. DIODE
CAUTION:
Never use a mega 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
positive side heat sink. The positive diode is in
good condition if resistance is 1 Ω or less only in the
direction from the diode lead to heat sink.
S6M0405A
S6M0411A
SC-16
(A) Diode lead
(B) Heat sink (Positive side)
S6M0406A