RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
Brake Rotor/Disc: Testing and Inspection
DISC BRAKE ROTOR
The rotor braking surfaces should not be refinished unless necessary.
Light surface rust and scale can be removed with a lathe equipped with dual sanding discs. The rotor surfaces can be restored by machining with a disc
brake lathe if surface scoring and wear are light. Replace the rotor for the following conditions:
Severely Scored
Tapered
Hard Spots
Cracked
Below Minimum Thickness
ROTOR MINIMUM THICKNESS
Measure rotor thickness at the center of the brake shoe contact surface. Replace the rotor if below minimum thickness, or if machining would reduce
thickness below the allowable minimum. Rotor minimum thickness is usually specified on the rotor hub. The specification is either stamped or cast
into the hub surface.
ROTOR RUNOUT
Check rotor lateral runout with dial indicator C-3339. Excessive lateral runout will cause brake pedal pulsation and rapid, uneven wear of the brake
shoes. Position the dial indicator plunger approximately 25.4 mm (1 inch) inward from the rotor edge.
NOTE: Be sure wheel bearing has zero end play before checking rotor runout. Maximum allowable rotor runout is 0.127 mm (0.005 inch)
ROTOR THICKNESS VARIATION
