Subaru 2002 IMPREZA Service Manual page 420

STARTING/CHARGING SYSTEMS
E: INSPECTION
1. ARMATURE
1) Check the commutator for any sign of burns of
rough surfaces or stepped wear. If wear is of a mi-
nor nature, correct it by using sand paper.
2) Run-out test
Check the commutator run-out, and then replace if
it exceeds the limit.
Commutator run-out:
Standard
0.05 mm (0.0020 in)
Service limit
Less than 0.10 mm (0.0039 in)
(A) Dial gauge
(B) V-block
3) Depth of segment mold
Check the depth of segment mold.
Depth of segment mold:
0.5 mm (0.020 in)
(A) Depth of mold
(B) Segment
(C) Mold
STARTER
4) Armature short-circuit test
Check the armature for short-circuit by placing it on
growler tester. Hold a hacksaw blade against the
armature core while slowly rotating armature. A
short-circuited armature will cause the blade to vi-
brate and to be attracted to core. If the hacksaw
blade is attracted or vibrates, the armature, which
is short-circuited, must be replaced or repaired.
5) Armature ground test
Using a circuit tester, touch one probe to the com-
mutator segment and the other to shaft. There
B2M4460A
should be no continuity. If there is continuity, the ar-
mature is grounded.
Replace the armature if it is grounded.
2. YOKE
Make sure the pole is set in position.
3. OVERRUNNING CLUTCH
S6M0401A
Inspect the teeth of pinion for wear and damage.
Replace if it is damaged. Rotate the pinion in direc-
tion of rotation (counterclockwise). It should rotate
smoothly. But in opposite direction, it should be
locked.
CAUTION:
Do not clean the overrunning clutch with oil to
prevent grease from flowing out.
SC-10
(A) Iron sheet
(B) Grower tester
S6M0402A
G6M0041