Generator Inspection

Hold the center of the generator with clutch pulley and check that the outer ring turns counterclockwise and does not turn clockwise.

Text in Illustration

	Free
	Lock

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.)

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

Check the generator rotor for an open circuit.

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

   Standard Resistance:

   for 100 A (w/o Dual Air Conditioning System), 130 A Type:

   Tester Connection	Condition	Specified Condition
   Slip ring - Slip ring	20°C (68°F)	2.3 to 2.7 Ω

   for 100 A (w/ Dual Air Conditioning System) Type:

   Tester Connection	Condition	Specified Condition
   Slip ring - Slip ring	20°C (68°F)	3.4 to 3.8 Ω

   for 150 A Type:

   Tester Connection	Condition	Specified Condition
   Slip ring - Slip ring	20°C (68°F)	1.5 to 1.9 Ω

   Text in Illustration

   *a

   Slip Ring

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

Check if the generator 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 MΩ or higher

   Text in Illustration

   *a	Slip Ring
   *b	Rotor Core

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

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.)