Brake Rotor Refinishing
Special Tools
| • |
CH-41013 Rotor
Resurfacing Kit |
| • |
CH-42450-A
Wheel Hub Resurfacing Kit |
For equivalent regional tools, refer to
Special Tools .
Warning: Refer to
Brake Dust Warning .
Note:
| • |
The disc brake
rotors do not require refinishing as part of routine brake system
service. New disc brake rotors do not require refinishing.
|
| |
Do not refinish disc brake rotors in an attempt to correct the
following conditions: |
| |
- |
Brake system
noise - squeal, growl, groan |
| |
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Uneven and/or
premature disc brake pad wear |
| |
- |
Superficial or
cosmetic corrosion/rust of the disc brake rotor friction
surface |
| |
- |
Scoring of the
disc brake rotor friction surface less than the maximum allowable
specification |
| • |
Before refinishing
a brake rotor, the rotor MUST first be checked for adequate
thickness to allow the rotor to be refinished and remain above the
minimum allowable thickness after refinish specification. Refer to
Brake Rotor Thickness Measurement . |
| |
Disc brake rotors should only be refinished if they have
adequate thickness to be refinished and if one or more of the
following conditions exist: |
| |
- |
Thickness
variation in excess of the maximum allowable specification
|
| |
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Excessive
corrosion/rust and/or pitting |
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- |
Cracks and/or
heat spots |
| |
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Excessive blueing
discoloration |
| |
- |
Scoring of the
disc brake rotor surface in excess of the maximum allowable
specification |
| • |
Disc brake rotors
may need to be refinished as part of the process for correcting
brake rotor assembled lateral runout (LRO) that exceeds the maximum
allowable specification. |
Note: If the vehicle is
equipped with cross-drilled rotors, use a lathe with positive rake
tooling. This setup requires less cutting pressure, which will
result in less vibration, and a better surface finish. Also, use a
vibration dampener when cutting. Otherwise, refinish according to
the following instructions.
Note: Whenever the brake
rotor has been separated from the hub/axle flange, clean any rust
or contaminants from the hub/axle flange and the brake rotor mating
surfaces. Failure to do this may result in increased assembled
lateral runout (LRO) of the brake rotor, which could lead to brake
pulsation.
| 1. |
Using the CH-42450-A
kit , thoroughly clean any rust or corrosion from the mating
surface of the hub/axle flange. |
| 2. |
Using the CH-41013
kit , thoroughly clean any rust or corrosion from the mating
surface and mounting surface of the brake rotor. |
| 3. |
Inspect the mating surfaces of
the hub/axle flange and the rotor to ensure that there are no
foreign particles or debris remaining. |
| 4. |
Mount the brake rotor to the
brake lathe according to the lathe manufacturer's instructions,
ensuring that all mounting attachments and adapters are clean and
free of debris. |
| 5. |
Ensure that any vibration
dampening attachments are securely in place. |
| 6. |
With the brake lathe running,
slowly bring in the cutting tools until they just contact the brake
rotor friction surfaces. |
| 7. |
Observe the witness mark on
the brake rotor. If the witness mark extends approximately
three-quarters or more of the way around the brake rotor friction
surface on each side, the brake rotor is properly mounted to the
lathe. |
| 8. |
If the witness mark does not
extend three-quarters or more of the way around the brake rotor,
re-mount the rotor to the lathe. |
| 9. |
Following the brake lathe
manufacturer's instructions, refinish the brake rotor. |
| 12. |
After refinishing the brake
rotor, use the following procedure in order to obtain the desired
non-directional finish: |
| |
12.1 |
Follow the brake lathe
manufacturer's recommended speed setting for applying a
non-directional finish. |
| |
12.2 |
Using moderate pressure, apply
the non-directional finish: |
| • |
If the lathe is equipped with a non-directional finishing tool,
apply the finish with 120-grit aluminum oxide sandpaper. |
| • |
If the lathe is not equipped with a non-directional finishing
tool, apply the finish with a sanding block and 150-grit aluminum
oxide sandpaper. |
| |
12.3 |
After applying a
non-directional finish, clean each friction surface of the brake
rotor with denatured alcohol, or an equivalent approved brake
cleaner. |
| 13. |
Remove the brake rotor from
the brake lathe. |
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