Front Disc Brake

FRONT DISC BRAKE


DISC ROTOR : Inspection and Adjustment


INSPECTION

Appearance
Check surface of disc rotor for uneven wear, cracks, and serious damage. Replace it if necessary.

Runout
1. Fix the disc rotor to the wheel hub and bearing assembly with wheel nuts (2 points at least).





2. Check the wheel bearing axial end play before the inspection. Refer to Testing and Inspection (2WD), Testing and Inspection(AWD).
3. Inspect the runout with a dial indicator to measured at 10 mm
(0.39 in) inside the disc edge.

Limit
Runout : Refer to BR-46, "Front Disc Brake". Front Disc Brake

4. Find the installation position that has a minimum runout by shifting the disc rotor-to-wheel hub and bearing assembly installation position by one hole at a time if the runout exceeds the limit value.
5. Replace or refinish the disc rotor if the runout is outside the limit even after performing the above operation.
[When refinishing, use the Pro-Cut PEM On-Car brake Lathe (Tool No. 38-PFM90.5) or equivalent.]

Thickness
Check the thickness of the disc rotor using a micrometer. Replace the disc rotor if the thickness is below the wear limit.






Limit
Wear thickness : Refer to BR-46, "Front Disc Brake". Front Disc Brake
Thickness variation : Refer to BR-46, "Front Disc Brake". Front Disc Brake


ADJUSTMENT

CAUTION:
- Burnish contact surfaces between disc rotors and pads according to following procedure after refinishing or replacing disc rotor, or if a soft pedal occurs at very low mileage.
- Be careful of vehicle speed because the brake does not operate firmly/securely until pad and disc rotor are securely fitted.
- Only perform this procedure under safe road and traffic conditions. Use extreme caution.
1. Drive vehicle on straight, flat road.
2. Depress brake pedal with the power to stop vehicle within 3 to 5 seconds until the vehicle stops.
3. Drive without depressing brake for a few minutes to cool the brake.
4. Repeat steps 1 to 3 until pad and disc rotor are securely fitted.