Because we've seen brake rotor installations that scare us, we're going to explain the proper procedure for front wheel-bearing adjustment. While turning the rotor, torque the castle nut to 17-25 lb-ft in order to seat the bearings. Feel for resistance or grinding. Locate the hole in your axle. Back the castle nut to the next hole and install the cotter pin. Wipe off any excess grease and install the cap.