User's Manual

1. Wire brush circumference of rotor to remove dirt and rust, and

then clean rotor in a non-toxic, greaseless cleaner.

CAUTION: Use of a petroleum-based cleaning solvent

may leave a residue which could

damage lining material.

2. Visually inspect rotor for heat checks, cracks, grooving, or

scoring beyond a depth of .030". If the rotor is:

• cracked - replace rotor.

• heat checked, but no cracks - reuse rotor.

Note: Many heat checks are similar in appearance to cracks.

If in doubt, a crack is deﬁ ned as a "surface split"

radiating into or from an edge of the rotor and/or

over 75% in length.

• grooved or scored -

- less than .030" - reuse rotor as is

- more than .030" - resurface rotor

1. The rotor should be resurfaced by mounting in an appropriate

brake lathe and removing the least amount of material

possible to ensure a smooth face.

2. Depending on the amount of braking surface scoring present,

every effort should be made to remove equal amounts from

each rotor face.

Note: Before installing on the vehicle, ensure that the rotor is

clean and re-inspected. After installing on vehicle, verify

that the lateral runout is within speciﬁ cation. See "Rotor

Runout Check" section.

Cleaning and Inspection

Replacing Rotor

Rotor Resurfacing

Good Rotor:

More than 43 mm (1.7 in.)

Replace Rotor:

Less than 43 mm (1.7 in.)

3. Measure thickness of area between rotor faces. The rotor

must be replaced if thickness is less than 41 mm (1.61 in.).

Replacing Rotor