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1. INSPECT GENERATOR ROTOR ASSEMBLY


  1. Check the generator rotor for an open circuit.



      A00989YE01

    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)
      		2.1 to 2.5 Ω

      Text in Illustration 
      *1
      		Slip Ring
      If the result is not as specified, replace the generator rotor assembly.



  1. Check if the generator rotor is grounded.



      A0096GRE01

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

      Standard Condition:
      Tester Connection
      		Condition
      		Specified Condition
      Slip ring - Rotor core
      		Always
      		10 kΩ or higher

      Text in Illustration 
      *1
      		Slip Ring
      *2
      		Rotor Core
      If the result is not as specified, replace the generator rotor assembly.

  1. Check that the slip rings are not rough or scored.
    If they are rough or scored, replace the generator rotor assembly.



    A009A20E01

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

    Standard diameter:
    14.2 to 14.4 mm (0.559 to 0.567 in.)

    Minimum diameter:
    14.0 mm (0.551 in.)

    Text in Illustration 
    *1
    		Diameter
    If the diameter is less than the minimum, replace the generator rotor assembly.

  1. Inspect the bearing.

    1. Check that the bearing is not rough or worn.
      If necessary, replace the generator rotor assembly.



2. INSPECT DRIVE END FRAME


  1. Check the stator for an open circuit.



      A009AF7E01

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      Coil lead - Coil lead
      		Always
      		Below 1 Ω

      Text in Illustration 
      *1
      		Coil Lead
      If the result is not as specified, replace the generator assembly.



  1. Check the stator for a short circuit.



      A0098QXE01

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      Coil lead - Drive end frame
      		Always
      		10 kΩ or higher

      Text in Illustration 
      *1
      		Coil Lead
      *2
      		Drive End Frame
      If the result is not as specified, replace the generator assembly.

  1. Inspect the bearing.

    1. Check that the bearing is not rough or worn.
      If necessary, replace the generator assembly.



3. INSPECT BRUSH HOLDER


    A00984BE04

  1. Using a vernier caliper, measure the exposed 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.)

    Text in Illustration 
    *1
    		Length
    If the exposed length is less than the minimum, replace the brush holder.



4. INSPECT GENERATOR HOLDER WITH RECTIFIER


    A0096G9E01

  1. Check the positive terminal of the rectifier.
    Text in Illustration 
    *1
    		Positive (+) Terminal
    *2
    		Rectifier Terminal

    1. Using an ohmmeter, connect one tester probe to the positive (+) terminal and the other to each rectifier terminal.

    2. Reverse the polarity of the tester probes and repeat the step above.

    3. Check that one polarity shows a resistance of below 1 Ω and the other shows a resistance of 10 kΩ or higher.
      If the result is not as specified, replace the generator holder with rectifier.



    A0094HZE01

  1. Check the negative terminal of the rectifier.
    Text in Illustration 
    *1
    		Negative (-) Terminal

    1. Using an ohmmeter, connect one tester probe to the negative (-) terminal and the other to each rectifier terminal.

    2. Reverse the polarity of the tester probes and repeat the step above.

    3. Check that one polarity shows a resistance of below 1 Ω and the other shows a resistance of 10 kΩ or higher.
      If the result is not as specified, replace the generator holder with rectifier.



5. INSPECT GENERATOR REGULATOR ASSEMBLY


    A0098BTE01

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Terminal F - Terminal B
    		Always
    		Below 1 Ω or higher than 10 kΩ

    Text in Illustration 
    *1
    		Terminal F
    *2
    		Terminal B
    If the result is not as specified, replace the generator regulator assembly.

    УКАЗАНИЕ:
    When the ohmmeter leads are initially touched to the regulator, one of the above values is output. When the leads are reversed, the reading changes to the other value.



    A0098K5E01

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Terminal F - Terminal E
    		Always
    		Below 1 Ω or higher than 10 kΩ

    Text in Illustration 
    *1
    		Terminal F
    *2
    		Terminal E
    If the result is not as specified, replace the generator regulator assembly.

    УКАЗАНИЕ:
    When the ohmmeter leads are initially touched to the regulator, one of the above values is output. When the leads are reversed, the reading changes to the other value.