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Bench Testing: Rotor

  1. Measure slip ring outer wear. If worn greater than .04" (1.0 mm) for models equipped with 4-cylinder engine, or .024 (.6 mm) on models equipped with 6-cylinder, replace rotor. See SLIP RING STANDARD DIAMETER & WEAR LIMIT  table. Inspect slip rings for contamination or roughness. Polish with No. 500 or 600 emery paper or crocus cloth.
    SLIP RING STANDARD DIAMETER & WEAR LIMIT

    Application In. (mm)
    Slip Ring Outer Diameter
    4-cylinder
    Standard 1.063 (27)
    Wear Limit 1.024 (26)
    6-cylinder
    Standard .894 (22.7)
    Wear Limit .870 (22.1)
  2. Check continuity between rotor slip rings. If continuity does not exist, replace rotor. Connect ohmmeter between each slip ring and rotor. If continuity exists, replace rotor assembly. Check rotor bearing for noise and ease of rotation when turning. Replace as necessary.