INSPECT GENERATOR WITH CLUTCH PULLEY
Hold the center of the generator pulley with clutch and check that the outer ring turns counterclockwise and does not turn clockwise.
|
Free |
|
Lock |
If the result is not as specified, replace the generator pulley with clutch.
INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
| *a | Length |
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.) |
If the exposed brush length is less than the minimum, replace the generator brush holder assembly.
INSPECT GENERATOR ROTOR ASSEMBLY
Check that the generator rotor bearing is not rough or worn and that it rotates smoothly.
If necessary, replace the generator rotor assembly.
Check the generator rotor assembly for an open circuit.
| *a | Slip Ring |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||
|---|---|---|---|---|---|---|
|
If the result is not as specified, replace the generator rotor assembly.
Check the generator rotor assembly for a short to ground.
| *a | Slip Ring |
| *b | Rotor Core |
Measure the resistance according to the value(s) in the table below.
| Standard Resistance | ||||||
|---|---|---|---|---|---|---|
|
If the result is not as specified, replace the generator rotor assembly.
Check each slip ring.
Check that the slip rings are not rough or scored.
If the slip rings are rough or scored, replace the generator rotor assembly.
| *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.) |
If the diameter is less than the minimum, replace the generator rotor assembly.