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 generator clutch pulley.

Using a vernier caliper, measure the brush length.

Standard length:

9.5 to 11.5 mm (0.374 to 0.453 in.)

Minimum length:

4.5 mm (0.177 in.)

Check the appearance.

1. Check that the bearing is not rough or worn.
   

   OK:

   The bearing rotates smoothly.
   

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

Check the resistance.

1. 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.
   




2. Measure the resistance between the slip ring and rotor core.
   

   Standard Resistance:

   Tester Connection	Specified Condition
   Slip ring - Rotor core	1 MΩ or higher

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

Check the slip ring diameter.

1. Using a vernier caliper, measure the slip ring diameter.
   

   Standard diameter:

   14.2 to 14.4 mm (0.559 to 0.567 in.)
   

   Minimum diameter:

   14 mm (0.551 in.)
   

   If the diameter is less than the minimum, replace the generator rotor assembly.
   

Check that the bearing is not rough or worn.

OK:

The bearing rotates smoothly.