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Fig. 4: Identifying J 45101-100 & Lug Nut 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. 5. Continue to hold the rotor secure and tighten the lug nut firmly by hand.
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 5: 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 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,
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
in order to properly secure the rotor. See Special Tools. Refer to Tire and Wheel 8. If the brake rotor has been REFINISHED or REPLACED with a new rotor, proceed to step 14. 9. If the brake rotor meets the following criteria, proceed to step 10. The rotor is within specifications and is being REUSED The rotor has NOT been refinished The rotor does NOT exhibit thickness variation exceeding the maximum allowable
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 6: Mounting Dial Indicator To Measure Lateral Runout 10. Mount a dial indicator, J 45101 , or equivalent, to the steering knuckle and position the indicator button so it contacts the brake rotor friction surface at a 90 degree angle, 11. Measure and record the assembled LRO of the brake rotor. 1. Rotate the rotor until the lowest reading is displayed on the indicator dial, then set the dial to zero. 2. Rotate the rotor until the highest reading is displayed on the dial. 3. Mark the location of the high spot relative to the nearest wheel stud, or studs. 4. Measure and record the amount of LRO. 12. Compare the brake rotor assembled LRO to the following specifications: Specification - JD9, JH6, JH7 Front and JH6, JH7 Rear: Brake rotor maximum Specification - JF3, JF7 Front: Brake rotor maximum allowable assembled lateral Specification - JD9 Rear: Brake rotor maximum allowable assembled lateral runout: 13. If the brake rotor assembled LRO is within specifications, proceed to step 18. If the brake rotor assembled LRO exceeds the specification, refinish the rotor to ensure true 14. Mount a dial indicator, J 45101 , or equivalent, to the steering knuckle and position the indicator button so it contacts the brake rotor friction surface at a 90 degree angle, 15. Measure and record the assembled LRO of the brake rotor. 1. Rotate the rotor until the lowest reading is displayed on the indicator dial, then set the dial to zero. 2. Rotate the rotor until the highest reading is displayed on the dial. 3. Mark the location of the high spot relative to the nearest wheel stud, or studs. 4. Measure and record the amount of LRO.
2008 Chevrolet Silverado 1500 2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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