Brake Rotor/Drum Balance Inspection
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Brake Rotor/Drum Balance Inspection
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4.
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Run the vehicle at the concern speed while inspecting for the presence of the vibration.
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5.
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Warning
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Do not depress the brake pedal with the brake rotors and/or the brake drums removed, or with the brake calipers repositioned away from the brake rotors, or damage to the brake system may result.
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If the vibration is still present, remove the rotors from the drive axle, then run the vehicle back to the concern speed.
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6.
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If the vibration is eliminated when the brake rotors are removed from the drive axle, repeat the test with one rotor installed at a time. Replace the rotor that is causing or contributing to the vibration concern.
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7.
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If a brake rotor was replaced as a result of following the previous steps, or if necessary to confirm the results obtained during the previous steps, and/or to check the non-drive axle components, perform the following:
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7.1.
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Mount the brake rotor/drum on a balancer in the same manner as a tire and wheel assembly.
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7.2.
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Note
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Check brake rotors/drums for static imbalance only; ignore the dynamic imbalance readings.
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Inspect the rotor/drum for static imbalance.
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There is not a set tolerance for brake rotor/drum static imbalance. However, any brake rotor /drum measured in this same manner which has a difference over 21 g (¾ may have the potential to cause or contribute to vibrations. Rotors/drums suspected of causing or contributing to a vibration should be replaced. Any rotor/drum that is replaced should be checked for imbalance in the same manner.
