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Component Testing: Commutator

  1. If out-of-round is more than .002" (.05 mm), turn the commutator on a lathe until out-of-round is within specification.
  2. Wear or cutting limit of commutator is 1.22" (31.0 mm) for Cressida and Supra, 1.08" (27.5 mm) on Mitsuba starters or 1.14" (29.0 mm) for all others.
  3. If worn less than .008" (.20 mm), insulating mica should be undercut to a depth of approximately .028-.035" (.71-.89 mm) on Toyota diesel models, or .015-.031" (.40-.80 mm) on all other models.
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