GENERATOR INSPECTION

  1. INSPECT GENERATOR PULLEY WITH CLUTCH

    1. Hold the generator rotor using SST, and turn the generator pulley with clutch clockwise to check that the outer ring locks.

      SST
      09820-63021
      A011U4XE03
      Text in Illustration
      *a Free
      *b Lock

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

  2. INSPECT GENERATOR DRIVE END FRAME BEARING

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

      A011RNC
      OK
      The bearing rotates smoothly.

      If the bearing does not rotate smoothly, replace the bearing.

  3. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

    1. Using a vernier caliper, measure the brush length.

      A011QV3E12
      Text in Illustration
      *a Length
      Standard length
      9.5 to 11.5 mm (0.374 to 0.453 in.)
      Minimum length
      4.5 mm (0.177 in.)

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

  4. INSPECT GENERATOR ROTOR ASSEMBLY

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

      A011SS1

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

    2. Check the rotor for an open circuit.

      A011SL4E12
      Text in Illustration
      *1 Slip Ring
      *2 Ohmmeter
      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) 2.3 to 2.7 Ω

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

    3. Check if the rotor is grounded.

      A011RUWE06
      Text in Illustration
      *1 Slip Ring
      *2 Ohmmeter
      *3 Rotor
      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 kΩ or higher

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

    4. Check the slip ring diameter.

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

        A011RSNE07
        Text in Illustration
        *a Diameter
        Standard diameter
        14.2 to 14.4 mm (0.559 to 0.567 in.)
        Minimum diameter
        14 mm (0.551 in.)

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