GENERATOR INSPECTION

PROCEDURE

1. INSPECT GENERATOR PULLEY WITH CLUTCH

   1. 

      Hold the center of the generator pulley with clutch, and confirm that the outer ring turns counterclockwise and does not turn clockwise.

      Table 1. Text in Illustration

      	Free
      	Lock

      If the result is not as specified, replace the generator pulley with clutch.

2. 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 2. Text in Illustration

      *a

      Length

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

3. 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)	1.8 to 2.2 Ω

         Table 3. 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	Always	10 MΩ or higher

         Table 4. Text in Illustration

         *1	Slip Ring
         *2	Rotor

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

   2. 

      Check that the bearing of the generator rotor is not rough or worn and that it rotates smoothly.

      If necessary, replace the generator rotor assembly.

   3. Check each slip ring.

      1. Check that the slip rings are not rough or scored.

         If the slip rings are rough or scored, 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 5. Text in Illustration

         *a

         Diameter

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