GENERATOR(for DENSO Made) INSPECTION

PROCEDURE


  1. INSPECT GENERATOR PULLEY WITH CLUTCH


    1. A00493YC02
      *a Free
      *b Lock

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

  2. INSPECT GENERATOR BRUSH HOLDER ASSEMBLY


    1. A00479DC04
      *a Length

      Using a vernier caliper, measure the length of the exposed brushes.

      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. Check the generator rotor bearing


      1. A0048PP

        Check that the generator rotor bearing is not rough or worn and that it rotates smoothly. If the generator rotor bearing is rough or worn, or does not rotate smoothly, replace the generator rotor assembly.

    2. Check the generator rotor assembly for an open circuit.


      1. A0047IKC05
        *a Slip Ring

        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) 1.8 to 2.2 Ω

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

    3. Check the generator rotor assembly for a short to ground.


      1. A004B9PC05
        *a Slip Ring
        *b Rotor

        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.

    4. A0049WR

      Check the slip ring.


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

        If the slip rings are rough or scored, replace the generator rotor assembly.

      2. A0046UTC06
        *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.)

        Tech Tips

        If the slip ring surface is dirty, polish it with sandpaper (400-grit).

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