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Fig. 55: Identifying J 45101-100 & Lug Nut 1. Remove the J 45101-100 and the lug nuts that were installed during the assembled LRO measurement procedure. See Special Tools. 2. Inspect the mating surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining. 3. Index the brake rotor in a different orientation to the hub/axle flange. 4. Hold the rotor firmly in place against the hub/axle flange and install one of the J 45101-100 (1) and one lug nut (2) onto the upper-most wheel stud. See Special Tools.
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
5. Continue to hold the rotor secure and tighten the lug nut firmly by hand. Fig. 56: Installing All J 45101-100s & Lug Nuts 6. Install the remaining J 45101-100 and lug nuts onto the wheel studs and tighten the nuts
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
firmly by hand in a star-pattern. See Special Tools. 7. Using the J 39544-KIT , or equivalent, tighten the lug nuts in a star-pattern to specification, in order to properly secure the rotor. See Special Tools. Refer to Tire and Wheel 8. Measure the assembled LRO of the brake rotor. Refer to Brake Rotor Assembled Lateral Runout Measurement. 9. Compare the amount of change between this measurement and the original measurement. 10. If this measurement is within specifications, proceed to step 14. 11. If this measurement still exceeds specifications, repeat steps 1-9 until the best assembled LRO measurement is obtained. 12. Matchmark the final location of the rotor to the wheel studs if the orientation is different than it was originally. 13. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification, refer to Brake Rotor Assembled Lateral Runout Correction. 14. If the brake rotor assembled LRO is within specification, install the brake caliper and depress the brake pedal several times to secure the rotor in place before removing the J BRAKE ROTOR ASSEMBLED LATERAL RUNOUT CORRECTION - ON VEHICLE LATHE Tools Required J 45101-100 Conical Brake Rotor Washers. See Special Tools. Correction CAUTION: Refer to Brake Dust Caution . IMPORTANT: Brake rotor thickness variation MUST be checked BEFORE Brake rotor assembled LRO exceeding the maximum
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1. Ensure that the caliper and caliper bracket that are already being supported, are clear from contacting any rotating components, such as the brake rotor. 2. Remove the J 45101-100 and the lug nuts that were installed during the assembled LRO measurement procedure and/or the indexing correction procedure. See Special Tools. 3. Inspect the mounting surface of the hub/axle flange and the brake rotor to ensure that there are no foreign particles or debris remaining. 4. Set up the lathe, following the manufacturer's instructions. 5. Refinish the brake rotor, following the brake lathe manufacturer's instructions. 6. After each successive cut, inspect the brake rotor thickness. Refer to Brake Rotor Thickness Measurement. 7. If at any time the brake rotor exceeds the minimum allowable thickness after refinish specification, the brake rotor must be replaced. After replacing the rotor, proceed to step 8. After refinishing the brake rotor, use the following procedure in order to obtain the desired non-directional finish: 1. Follow the brake lathe manufacturer's recommended speed setting for applying a non- directional finish. 2. Using moderate pressure, apply the non-directional finish: If the lathe is equipped with a non-directional finishing tool, apply the finish with If the lathe is not equipped with a non-directional finishing tool, apply the finish 3. After applying a non-directional finish, clean each friction surface of the brake rotor with denatured alcohol, or an equivalent approved brake cleaner. 9. Remove the lathe from the vehicle. 10. Measure the assembled LRO of the brake rotor. Refer to Brake Rotor Assembled Lateral Runout Measurement. 11. If the brake rotor assembled LRO measurement still exceeds the maximum allowable specification, refer to Brake Rotor Assembled Lateral Runout Correction. 12. If the brake rotor assembled LRO is within specification, install the brake caliper and depress the brake pedal several times to secure the rotor in place before removing the J BRAKE ROTOR REFINISHING Lateral Runout Measurement.
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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