Brake Rotor Surface and Wear Inspection
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Brake Rotor Surface and Wear Inspection
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Refer to
Brake Dust Warning
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2.
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Clean the friction surfaces of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner.
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3.
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Inspect the friction surfaces of the brake rotor for the following Braking Surface Conditions:
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Heavy rust and/or pitting
Light surface rust can be removed with an abrasive disc. Heavy surface rust and/or pitting must be removed by refinishing the rotor.
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Cracks and/or heat spots
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Excessive blueing discoloration
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4.
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If the friction surfaces of the brake rotor exhibit one or more of the Braking Surface Conditions, the rotor requires refinishing or replacement.
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5.
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Using a micrometer calibrated in thousandths-of-a-millimeter, or ten-thousandths-of-an-inch, measure and record the scoring depth of any grooves present on the rotor friction surfaces.
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6.
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Compare the groove scoring depth recorded to the following specification:
Specification
Brake rotor maximum allowable scoring: 1.50 mm (0.059 in)
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7.
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If the brake rotor scoring depth exceeds the specification, or if an excessive amount of scoring is present, the rotor requires refinishing or replacement.
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