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Commutator Testing

  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. See COMMUTATOR SPECIFICATIONS table.
    COMMUTATOR SPECIFICATIONS

    Application Maximum Runout In. (mm) Minimum Diameter In. (mm)
    B2200 (A/T), MX-3 V6, MX-6, Protege (A/T), RX7, 626 & 929 .004 (.10) 1.13 (28.8)
    B2600i (M/T) .002 (.05) 1.08 (27.4)
    B2600i (A/T) .002 (.05) 1.24 (31.4)
    MPV
    4-Cylinder Engine
    Standard (M/T & A/T) .004 (.10) 1.08 (27.4)
    Heavy Duty (A/T) .004 (.10) 1.24 (31.4)
    V6 Engine .004 (.10) 1.13 (28.8)
  3. Commutator mica undercut depth should be .02 -.03" (.5 -.8 mm). Minimum mica undercut depth is .008" (.20 mm). If not within specification, undercut to standard depth.
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