Magnum SRT-8 V8-6.1L VIN 3 (2006)
Brake Rotor/Disc: Testing and Inspection
DIAGNOSIS AND TESTING BRAKE ROTOR
Any servicing of the rotor requires extreme care to maintain the rotor within service tolerances to ensure proper brake action. Excessive runout or
wobble in a rotor can increase pedal travel due to piston knock-back. This increases guide pin sleeve wear due to the tendency of the caliper to follow
the rotor wobble. When diagnosing a brake noise or pulsation, the machined disc braking surface should be inspected.
BRAKING SURFACE INSPECTION
Light braking surface scoring and wear is acceptable. If heavy scoring or warping is evident, the rotor must be refaced or replaced.
Excessive wear and scoring of the rotor can cause improper lining contact on the rotor's braking surface. If the ridges on the rotor are not removed
before new brake shoes are installed, improper wear of the shoes will result.
If a vehicle has not been driven for a period of time, the rotor's braking surface will rust in the areas not covered by the brake shoes at that time. Once
the vehicle is driven, noise and chatter from the disc brakes can result when the brakes are applied.
Some discoloration or wear of the rotor surface is normal and does not require resurfacing when linings are replaced. If cracks or burned spots are
evident, the rotor must be replaced.
ROTOR MINIMUM THICKNESS
Measure rotor thickness (1) at the center of the brake shoe contact surface. Replace the rotor if it is worn below minimum thickness or if machining
the rotor will cause its thickness to fall below specifications.
CAUTION: Do not machine the rotor if it will cause the rotor to fall below minimum thickness.
Most minimum thickness specifications (1) are cast into the rotor's unmachined surface (2). Some brake rotors have the minimum thickness
specification located elsewhere. Limits can also be found in this component's specification table.
