Generator Inspection

Hold the center of the pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise.
If the result is not as specified, replace the clutch pulley.

Using vernier calipers, measure the length of the exposed brushes.

Standard exposed length:

9.5 to 11.5 mm (0.374 to 0.453 in.)

Minimum exposed length:

4.5 mm (0.177 in.)

Check that the generator rotor bearing is not rough or worn.
If necessary, replace the generator rotor assembly.

Check the generator rotor for an open circuit.

1. Using an ohmmeter, measure the resistance between the slip rings.
   

   Standard resistance:

   Condition	Specified condition
   Approx. 20°C (68°F)	2.3 to 2.7 Ω

   If the result is not as specified, replace the generator rotor assembly.
   

Check the rotor for a short to ground.

1. Using an ohmmeter, measure the resistance between the slip ring and rotor.
   

   Standard resistance:

   Tester condition	Specified condition
   Slip ring - Rotor	1 MΩ or higher

   If the result is not as specified, replace the generator rotor assembly.
   

Using vernier calipers, measure the slip ring diameter.

Standard diameter:

14.2 to 14.4 mm (0.559 to 0.567 in.)

Minimum diameter:

14.0 mm (0.551 in.)

Check that the drive end frame bearing is not rough or worn.
If necessary, replace the drive end frame bearing.