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. If rough, polish with #500- 600 sandpaper.




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

Standard Limit mm (in)
14.4 (0.51) 12.8 (0.51)




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

Standard 2.9 Ohms or more




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.

Standard 0.1 Ohms

2. Measure insulation resistance between stator coil and core with a mega-ohmmeter.

Standard 1 M Ohms or more

BRUSH




Measure the brush length.

Standard Limit
10.5 (0.41) 8.4 (0.33)

If more than limit, replace the brush.

RECTIFIER ASSEMBLY




Check for continuity across "P" and "E" in the x 100 Ohms 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 Ohms 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.
If less than standard, replace the coil.