- Stone and undercut commutator.
- Electrically test the armature, field coils and inter-poles and record data.
- Using a small high speed blower, compressed air and nitrogen gas the coils of the armature are blown out to remove carbon that has accumulated over time.
- Clean and remove debris from the entire machine (loose paint, broken insulation, grease and carbon dust).
- On gearless machines, the entire brush assembly is disassembled and the insulators inspected and replaced if necessary, the brush boxes and ring assembly bead blasted to remove grounds.
- Seal V-ring.
- Check and set the neutral plane on brush assembly if necessary.
- Check and set the cornering of brush boxes.
- Apply a Class – F polyurethane spray epoxy to the armature and fields (the application of the spray epoxy helps to re-insulate the machine and keep out small particulates).
