Starter Component Inspection: Commutator

1992 Toyota Pickup Base, W55SECTION Commutator
  1. If commutator runout (out-of-round) is more than .002" (.05 mm), turn commutator on a suitable lathe until runout is within specification.
  2. Wear or cutting limit of commutator diameter is 1.22" (31.0 mm) for Cressida and 1.14" (29.0 mm) for all other models.
  3. If commutator diameter is worn or turned down more than .008"(.20 mm), undercut insulating mica between commutator segments to a depth of about .008-.024" (.20-.60 mm).
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.