Rotor Assembly
- Inspect the slip rings for contamination or any roughness on the sliding surface.
- Measure the slip ring outer diameter.
Slip ring outer diameter:
Standard
14.2-14.8 mm (0.559-0.583in)
Limit
14.0 mm (0.551in)
- Check the resistance between slip rings.
Specification:
Approx. 2.0-2.4 Ω
- Check insulation between slip ring and rotor core or shaft. Replace the rotor assembly if continuity exists.
- Check the ball bearings (rotor side). Check the following items and replace the rotor assembly if necessary.
- Check that there is no deformation, rust or other damages.
- Check that there is no resistance or looseness when rotating the ball bearings by hand.
- Check for grease leakage.