GENERATOR INSPECTION

PROCEDURE

  1. INSPECT GENERATOR PULLEY WITH CLUTCH

    1. A196799C03

      *a

      Free

      *b

      Lock

      Hold the center of the generator pulley, and check 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. A297148

      Using a vernier caliper, measure the brush length.

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

  3. INSPECT GENERATOR ROTOR ASSEMBLY

    1. A296802C03

      *1

      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

        20°C (68°F)

        1.5 to 1.9 Ω

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

    2. A296803C03

      *1

      Slip Ring

      *2

      Rotor Core

      Check if the rotor is grounded.

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

        Standard Resistance

        Tester Connection

        Condition

        Specified Condition

        Slip ring - Rotor core

        Always

        10 kΩ or higher

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

    3. Check that the slip rings are not rough or scored.

      If rough or scored, replace the generator rotor assembly.

    4. A297149

      Using a vernier caliper, measure the diameter of the slip rings.

      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 ROTOR BEARING

    1. A196744

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

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