GENERATOR INSPECTION

PROCEDURE


  1. INSPECT GENERATOR WITH CLUTCH PULLEY


    1. A00Y8VWC02
      *a Free
      *b Lock

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

      OK
      The outer ring turns counterclockwise and does not turn clockwise.

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

  2. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY


    1. A00Y6HXC08
      *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. A00Y6VGC01
      *a Slip Ring

      Check the generator rotor assembly for an open circuit.


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Slip ring - Slip ring Approximately 20°C (68°F) 1.8 to 2.2 Ω

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

    2. A00YAL7C01
      *a Slip Ring
      *b Rotor

      Check the generator rotor assembly for a short to ground.


      1. 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

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

    3. A00Y5XJ

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

      If the bearing does not rotate smoothly, replace the generator rotor assembly.

    4. A00Y89PC02
      *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. A00Y9KV

      Check that the generator drive end frame bearing is not rough or worn and that it rotates smoothly.

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