GENERATOR INSPECTION

PROCEDURE


  1. INSPECT GENERATOR PULLEY WITH CLUTCH


    1. B003UFDC03
      B003WAF Free
      B003U82 Lock

      Hold the center of the generator pulley with clutch, and check 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 pulley with clutch.

  2. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY


    1. B003T19C03
      *a Length

      Using a vernier caliper, measure the brush length.

      Standard Exposed Brush Length
      9.5 to 11.5 mm (0.374 to 0.453 in.)
      Minimum Exposed Brush Length
      4.5 mm (0.177 in.)

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

  3. INSPECT GENERATOR ROTOR ASSEMBLY


    1. B003UD5C02
      *a Slip Ring

      Check the rotor 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 Approx. 20°C (68°F) 1.5 to 1.9 Ω

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

    2. B003WHWC03
      *a Slip Ring
      *b Rotor

      Check if the rotor is grounded.


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

        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.

    3. B003UTJ

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

      OK
      The bearing is not rough or worn.

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

    4. Check the slip ring diameter.


      1. B003TZBC02
        *a Diameter

        Using a vernier caliper, measure the diameter of each slip ring.

        Standard Diameter
        14.2 to 14.4 mm (0.559 to 0.567 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. B003X7K

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

      OK
      The bearing is not rough or worn and it rotates smoothly.

      If the result is not as specified, replace the generator drive end frame bearing.