GENERATOR INSPECTION


  1. INSPECT GENERATOR PULLEY WITH CLUTCH


    1. A01EWK2E03
      Text in Illustration
      *a Free
      *b Lock

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

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

  2. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY


    1. A01EXHUE14
      Text in Illustration
      *a Length

      Using a vernier caliper, 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.)

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

  3. INSPECT GENERATOR ROTOR ASSEMBLY


    1. A01ET14E02

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

      If necessary, replace the generator rotor assembly.

    2. Check the generator rotor assembly for an open circuit.


      1. A01ETZSE23
        Text in Illustration
        *1 Ohmmeter
        *2 Slip Ring

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

        Standard Resistance
        Tester Connection Specified Condition
        Slip ring 2.3 to 2.7 Ω

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

    3. Check the generator rotor assembly for a short to ground.


      1. A01EUATE18
        Text in Illustration
        *1 Ohmmeter
        *2 Rotor
        *3 Slip Ring

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

        Standard Resistance
        Tester Connection Specified Condition
        Slip ring - Rotor 10 MΩ or higher

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

    4. A01EYPTE07
      Text in Illustration
      *a Diameter

      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.)

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

  4. INSPECT GENERATOR DRIVE END FRAME BEARING


    1. A01EWPM

      Check that the generator drive end frame bearing is not rough or worn.

      OK
      The generator drive end frame bearing rotates smoothly.

      If the generator drive end frame bearing does not rotate smoothly, replace the generator drive end frame bearing.