PROCEDURE
INSPECT GENERATOR WITH CLUTCH PULLEY
Hold the center of the generator with clutch pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise.
OK |
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The outer ring turns counterclockwise and does not turn clockwise. |
*a | Free |
*b | Lock |
If the result is not as specified, replace the generator with clutch pulley.
INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
Using a vernier caliper, measure the length of the exposed brushes.
*a | Length |
Standard Exposed Length |
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9.5 to 11.5 mm (0.374 to 0.453 in.) |
Minimum Exposed Length |
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4.5 mm (0.177 in.) |
If the exposed length is less than the minimum, replace the generator brush holder assembly.
INSPECT 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 | ||||||
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If the result is not as specified, replace the generator rotor assembly.
Check the generator rotor assembly for a short to ground.
*a | Rotor |
*b | Slip Ring |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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If the result is not as specified, replace the generator rotor assembly.
Check that the generator rotor bearing is not rough or worn and that it rotates smoothly.
If the generator rotor bearing does not rotate smoothly, replace the generator rotor assembly.
Using a vernier caliper, measure the diameter of each slip ring.
*a | Diameter |
Standard Diameter |
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14.2 to 14.8 mm (0.559 to 0.583 in.) |
Minimum Diameter |
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14.0 mm (0.551 in.) |
If the diameter is less than the minimum, replace the generator rotor assembly.
INSPECT GENERATOR DRIVE END FRAME BEARING
Check that the generator drive end frame bearing is not rough or worn and that it rotates smoothly.
If the generator drive end frame bearing does not rotate smoothly, replace the generator drive end frame bearing.