Inspection and Repair

Repair or replace necessary parts if extreme wear or damage is found during inspection.

Rotor Assembly




1. Check the rotor slip ring surfaces for contamination and roughness. It rough, polish with #500-600 sandpaper.




2. Measure the slip ring diameter, and replace if it exceeds the limit.




3. Check resistance between slip rings, and replace it there is no continuity.




4. Check for continuity between slip ring and rotor core. In case of continuity, replace the rotor assembly.

Stator Coil
1. Measure resistance between respective phases.




2. Measure insulation resistance between stator coil and core with a mega-ohmmeter.
If less than standard, replace the coil.




Brush
Measure the brush length.
If more than limit, replace the brush.
Standard: 10. mm (0.4134 in)
Limit: 8.4. mm (0.3307 in)




Rectifier Assembly
Check for continuity across P and E in the x 100 W range of multimeter.
Change polarity, and make sure that there is continuity in one direction, and not in the reverse direction. In case of continuity in both directions, replace the rectifier assembly.




IC Regulator Assembly
Check for continuity across B and F in the x 100 W range Of multimeter.
Change polarity, and make sure that there is continuity in one direction, and not in the reverse direction. In case Of continuity in both directions, replace the IC regulator assembly.