GENERATOR INSPECTION

INSPECT GENERATOR ROTOR ASSEMBLY

1. 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

      Table 1. 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

      Table 2. Text in Illustration

      *1	Slip Ring
      *2	Rotor Core

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

2. 

   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.)

   Table 3. Text in Illustration

   *1

   Diameter

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

3. 

   Check that the generator rotor bearing is not rough or worn.

   If necessary, replace the generator rotor assembly.

INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

1. 

   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.)

   Table 4. Text in Illustration

   *1

   Length

   If the brush length is less than the minimum, replace the generator brush holder assembly.