Generator Inspection

Check the resistance.

1. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   Slip ring - Slip ring	20°C (68°F)	1.5 to 1.9 Ω

   Text in Illustration

   *1

   Slip Ring

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




2. Measure the resistance according to the value(s) in the table below.
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   Slip ring - Rotor core	Always	10 kΩ or higher

   Text in Illustration

   *1	Slip Ring
   *2	Rotor Core

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

Using a vernier caliper, measure the slip ring diameter.

Standard diameter:

14.2 to 14.8 mm (0.559 to 0.583 in.)

Minimum diameter:

14.0 mm (0.551 in.)

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

Using a vernier caliper, measure the brush length.

Standard exposed length:

9.5 to 11.5 mm (0.374 to 0.453 in.)

Minimum exposed length:

4.5 mm (0.177 in.)