Rotor: Testing and Inspection

ROTOR




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

Standard resistance: About 2.9 ohm




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




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

Standard diameter: 14.4 mm (0.567 in.)
Minimum diameter: 14.0 mm (0.551 in.)

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