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Commutator Test: MPV

WARNING: This page is about a different car, the 1998 Mazda Protege, 1998 Mazda Millenia, 1998 Mazda MPV, and 1998 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean surface and polish with No. 400 sandpaper if required. If surface is scored, out of round or pitted, turn commutator in a lathe.
  2. Maximum commutator runout and minimum diameter of commutator must not exceed specification after turning.
  3. Standard commutator mica undercut depth is .020" (.50 mm). Minimum mica undercut depth is .008" (.20 mm). If not within specification, undercut to standard depth.
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