Subaru IMPREZA 2002 Service Manual page 320

GENERATOR
START1 NG/CHARG I NG SYSTEMS
2. ROTOR
1) Slip ring surface:
Inspect the slip rings for contamination or any
roughness of the sliding surface. Repair the slip
ring surface using a lathe or sand paper.
2) Slip ring outer diameter:
Measure the slip ring outer diameter. If the slip ring
is worn replace the rotor assembly.
Slip ring outer diameter:
Standard
Limit
22.7 mm (0.894 in)
22.1 mm (0.870 in)
3) Continuity test:
Check the resistance between slip rings using a cir-
cuit tester.
If the resistance is not within specification, replace
the rotor assembly.
Specified resistance:
Approx. 2.7
-
3.2
a
I
G6M0075
I
4) Insulation test:
Check the continuity between slip ring and rotor
core or shaft. If the resistance value is below l R ,
the rotor coil is grounded, and so replace the rotor
assembly.
G6M0076
5) Ball bearing (rear side):
(1) Check the rear ball bearing. Replace if it is
noisy or if the rotor does not turn smoothly.
(2) The rear bearing can be removed by using a
common bearing puller.
I
G6M0077
3. STATOR
1) Continuity test:
Inspect the stator coil for continuity between each
end of the lead wires. If the resistance value is
above 1 MR between individual lead wires, the lead
wire is broken, and so replace the stator assembly.
I
,-
Stator
I
G6M0078
2) Insulation test:
Inspect the stator coil for continuity between stator
coil and each end of the lead wire. If the resistance
value is below l R , the stator coil is grounded, and
so replace the stator assembly.
G6M0079
SC-16