Starter Component Tests: Commutator
- Clean surface with No. 400 sandpaper if required. Check for continuity between commutator segments. If no continuity is present, replace armature.
- If surface is scored, out of round or pitted, turn commutator in a suitable lathe. Maximum commutator runout and minimum diameter of commutator must be within specification after turning. See NIPPONDENSO STARTER SPECIFICATIONS table under STARTER SPECIFICATIONS.
- Commutator mica undercut depth should be .024" (.60 mm). Minimum mica undercut depth is .008" (.20 mm). If not within specification, undercut mica between segments using a hacksaw blade to obtain standard mica depth.