F 250 2WD Pickup V8-7.3L DSL Turbo VIN F (1994)
Brake Rotor/Disc: Initial Inspection and Diagnostic Overview
NOTE: Grease or any other foreign material must be kept off the brake shoe and lining (2001) surfaces of the rotor and external surfaces of the front
disc brake hub and rotor (1102) during service operations. In handling the front disc brake hub and rotor and disc brake caliper (2B120) assemblies,
avoid deformation of the front disc brake hub and rotor and nicking or scratching of brake shoes and linings.
PURPOSE
In the manufacturing of the brake rotor all the tolerances regarding surface finish, parallelism, and lateral runout are held very closely. The
maintenance of these tolerances provide the surface necessary to prevent brake roughness.
Light scoring of the rotor surface not in excess of 0.38 mm (0.015-inch) in depth is normal. This condition does not affect the brake operation.
Some discoloration or wear of the disc surface is normal and does not require re-surfacing when linings are replaced.
SPECIFICATIONS - See: Specifications
LATERAL RUNOUT
Lateral runout is the movement of the rotor from side to side as it rotates on the spindle. This could also be referred to as "rotor wobble".
This movement causes the brake pad and piston to be knocked back into it's bore. This results in additional pedal travel and a vibration during
braking.
