GENERATOR(for 150 A Type) INSPECTION

PROCEDURE

INSPECT GENERATOR PULLEY WITH CLUTCH

	Free
	Lock

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

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

INSPECT GENERATOR BRUSH HOLDER ASSEMBLY

*1	Length

Using a vernier caliper, measure the brush 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.

INSPECT GENERATOR ROTOR ASSEMBLY

*1	Slip Ring

Check the rotor for an open circuit.

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.

*1	Slip Ring
*2	Rotor Core

Check if the rotor is grounded.

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

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

Check the slip ring diameter.

*1	Diameter

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

Standard diameter

14.2 to 14.8 mm (0.559 to 0.583 in.)

Minimum diameter

14.0 mm (0.551 in.)

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

Check the bearing.
1. 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.