Subaru Impreza 2003, Service Manual

Page: 400 / 3610

SC(H4SO)-10
STARTING/CHARGING SYSTEMS
STARTER
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)
3) Depth of segment mold
Check the depth of segment mold.
Depth of segment mold:
0.5 mm (0.020 in)
4) Armature short-circuit test
Check the armature for short-circuit by placing it on
a growler tester. Hold an iron sheet against the ar-
mature core while slowly rotating armature. A
short-circuited armature will cause the iron sheet to
vibrate and to be attracted to core. If the iron sheet
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
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
Inspect the teeth of pinion for wear and damage.
Replace if it is damaged. It is normal if the pinion ro-
tates smoothly in direction of rotation (counter-
clockwise) and does not rotate in the opposite
direction.
CAUTION:
Do not clean the overrunning clutch with oil to
prevent grease from flowing out.
(A) Dial gauge
(B) V-block
(A) Depth of mold
(B) Segment
(C) Mold
SC-00021
( C )
( B )
( A )
SC-00022
(A) Iron sheet
(B) Grower tester
SC-00023
( A )
( B )
SC-00024