GENERATOR INSPECTION


  1. INSPECT GENERATOR ROTOR ASSEMBLY


    1. A01CH4R

      Check the rotor for open circuit.


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

        Standard resistance
        10.6 to 11.4 Ω at 20°C (68°F)

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

    2. A01CIV1

      Check the rotor for ground.


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

        Standard resistance
        10 MΩ or higher at 20°C (68°F)

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

    3. A01CIZQ

      Using vernier calipers, measure each slip ring diameter.

      Standard diameter
      14.2 to 14.4 mm (0.559 to 0.567 in.)
      Minimum diameter
      12.8 mm (0.504 in.)

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

    4. Check that each slip ring is not rough or scorched.

      If rough or scorched, restore them with sandpaper (No. 400) or replace the generator rotor assembly.

  2. INSPECT GENERATOR HOLDER WITH RECTIFIER


    1. A01CHCAE01

      Using an ohmmeter, check the continuity among terminals P1, P2, P3, P4 and B, and among P1, P2, P3, P4 and E.

      Standard
      When the positive and negative poles among terminals P1, P2, P3, P4 and B are exchanged, there is continuity in one direction but no continuity in the other direction. When the positive and negative poles among terminals P1, P2, P3, P4 and E are exchanged, there is continuity in one direction but no continuity in the other direction.

      If the result is not as specified, replace the generator holder with rectifier.

  3. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY


    1. A01CIWWE01

      Using a vernier caliper, measure the exposed brush length.

      Standard exposed brush length
      9.5 to 11.5 mm (0.374 to 0.453 in.)
      Minimum exposed brush length
      1.5 mm (0.059 in.)

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

  4. INSPECT STATOR COIL


    1. A01CGVHE01

      Inspect the stator for ground.


      1. Using an ohmmeter, check the resistance between the P1,P2,P4 and drive end frame.

        Standard resistance
        10 MΩ or higher

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

    2. Check the stator coil for open circuits.


      1. Using an ohmmeter, check the resistance between the P1,P4 and P3.

        Standard resistance
        1.5 Ω or lower

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