Before working on the Brake Disc, make sure that nothing on the caliper or caliper bracket can rotate with the rest of the system. Undo the conical disc washers (J 45101-100) and the lug nuts installed during the assembled lateral runout procedure. Check the surface where the hub/axle flange joins with the Brake Disc to make sure it is clean. Following the instructions from the manufacturer, set up the lathe and begin refinishing the Brake Disc, watching the thickness after every cut. The Brake Disc needs to be replaced if it is thinner than the minimum after you refinish it. After you have finished refinishing, use the proper speed setting to apply a non-directional finish on the disc; in case the lathe includes a non-directional finishing attachment, use 120 grit aluminum oxide sandpaper, or opt for a sanding block with 150 grit aluminum oxide sandpaper if it does not. Make sure to clean all sides of the Brake Disc's friction surfaces using denatured alcohol or a suitable brake cleaner. As soon as the lathe comes off the vehicle, use a ruler to see if the assembled lro of the disc is within limits. If the measurement goes over the maximum limit, more adjustments need to be done. If your lro measurement is acceptable after refinishing, attach the brake caliper before pressing the brake several times, and take off the disc washers along with the lug nuts.