Brad's Car Manuals: A 3rd party mirror of CHARM + LEMON car manuals
Home >> Ford >> 1990 >> Festiva L >> Repair and Diagnosis >> Electrical >> Starter >> Bench Tests >> Commutator

Bench Tests: Commutator

Download the full database via torrent (~1.1 TB)  |  Download Brad's custom LEMON patches
  1. Clean surface of commutator and polish with No. 400 grit sandpaper (if required). If surface is scored, out of round or pitted, turn commutator on a lathe.
  2. Maximum commutator runout and minimum diameter of commutator must not exceed specification after turning. See COMMUTATOR SPECIFICATIONS table.
  3. Commutator mica undercut depth should be .020-.030" (.50-.80 mm). If undercut depth is not within specification, undercut with a hacksaw blade to standard depth.
COMMUTATOR SPECIFICATIONS

Application Maximum Runout Minimum Diameter
Festiva .002" (.05 mm) 1.22" (31.0 mm)
scientia non olet · About Brad's Car Manuals