Subaru XT 1988 Service Manual page 1198

ENGINE ELECTRICAL SYSTEM 6-1
2) Checking slip ring surface
Check the slip ring surface for roughness or contamination
with oil. If the surface is rough, smoothen with sandpaper
(#500 - #600). If contaminated with oil, wipe with clean
cloth moistened with alcohol.
3) Checking rotor coil for continuity
Check the rotor coil for continuity between slip rings using a
circuit tester. If no continuity is detected, replace the rotor.
Fig. 32
4) Checking rotor coil for proper insulation
Check for continuity between the slip ring and rotor core or
shaft using a circuit tester. If continuity is noted, the rotor coil
is shortcircuited, and the rotor must be replaced with a new
one.
E6-060
Fig.
33
5) Check the rear side ball bearing.
If resistance is felt wh ile rotating, or if abnormal noise is
heard, replace the ball bearing.
After separating the rotor, be sure to replace the rear side ball
E6-061
Fig.
34
STATOR
1) Checking stator coil for continuity
Check the stator coil for continuity between terminals using a
circuit tester. If no continuity is noted, it indicates that the
stator coil is disconnected, and the stator must be replaced.
Lead wire
T9-046H
Fig.
35
2) Checking stator coil for proper insulation
Connect the circuit tester between any terminal of the stator
coil and the stator core. If continuity is noted, it indicates that
the stator coil is shortcircuited inside, and the stator must be
replaced.
T9-047H
bearing.
Fig. 36
17