Rotor Assembly
- Inspect outside circumference of slip rings for dirt or roughness. If necessary, clean or polish slip rings with fine sandpaper. If slip rings are badly worn or roughened, rotor assembly must be replaced since slip rings are not serviced as a separate item.
- Connect ohmmeter leads to field coil and slip ring. See Fig 1. There should be no continuity. If continuity does exist, field coil is defective. Replace rotor assembly.
- Connect ohmmeter leads to slip ring and rotor shaft or core. See Fig 2. There should be no continuity. If continuity does exist, coil or slip ring is grounded. Replace rotor assembly.