Rotor: Testing and Inspection

Rotor




- Using ohmmeter, check for continuity between slip rings of rotor. If there is no continuity, replace rotor.

Standard resistance: About 2.9 ohms




- Using ohmmeter, check that there is no continuity between slip ring and rotor. If there is continuity, replace rotor.




- Check slip rings for roughness or scoring. If rough or scored, replace rotor.
Using a vernier caliper, measure the slip ring diameter.

Standard diameter: 14.2 - 14.4 mm (0.557 - 0.567 in)
Minimum diameter: 12.8 mm (0.504 in)

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