Subaru XT 1988 Service Manual page 1203

6-1 ENGINE ELECTRICAL SYSTEM
ROTOR
1) Checking slip ring surface
Repair the slip ring surface, if rough, with a lathe or fine sand-
paper.
2) Checking rotor coil for continuity
Check the resistance between the slip rings with a circuit
tester. It should be somewhere between
3.0
and
3.Sn.
If the
resistance is not within this range, replace rotor with a new
one.
/~
o
L6-1663
Fig. 51
3) Checking rotor coil for proper insulation
Check for continuity between the slip ring and rotor core
using a circuit tester. If continuity is noted, the rotor coil is
shortcircu ited, and the rotor must be replaced with a new one.
L6-1664
Fig. 52
BEARING
Check front and rear ball bearings.
If resistance is felt while rotating, or if abnormal noise is
heard, replace the ball bearing.
After separating the rotor, be sure to replace front and rear
ball bearings.
1) Replacing front bearing
Install closely fit jig on the bearing outer race. Press the
bearing down into place with a hand press or vise. A socket
wrench can serve as the jig.
22
L6-1665
Fig. 53
2) Replacing rear bearing
The rear bearing can be removed by using a common bearing
puller. When installing a new one, press-fit so that its peri-
pheral groove is on the slip ring side.
L6-1666
Fig. 54
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
Fig. 55