Before disassembling your vehicle, purchase or rent the tool necessary to remove the locknut and adjusting nut from the spindle, and obtain the parts needed to replace the inner bearing seal, which should always be replaced when the entire front hub assembly is dismantled. If the required specifications for the locknut and adjusting nut are unavailable, it is advisable to have this operation performed by a dealer service department or a shop specializing in this type of work. Begin by raising the front of the vehicle and securely placing it on jackstands, then remove the wheel(s) and brake caliper(s). For all axles except model 44 with manual hub locks, remove the wheel bearing locknut, lock ring, and adjusting nut using the special lockwrench tool. For model 44 axles with manual hub locks, remove the adjusting nut with a special locknut tool by applying inward pressure on the wrench to disengage the self-locking mechanism, continuing to apply pressure as the nut is loosened and removed. Pull the hub and disc assembly off the spindle, allowing the outer wheel-bearing assembly to slide out. Remove the inner bearing and grease seal from the hub using an appropriate puller and slide hammer. Clean all old grease from the bearings using solvent and inspect for pits, cracks, snarks, and flat spots, replacing any that show excessive wear. Clean the bearing outer races within the hub and inspect them for the same criteria; if replacement is necessary, drive out the bearing races from the wheel hub with a brass drift and install new races with a bearing driver, ensuring they are driven in squarely and seated correctly to avoid damage. Lubricate the bearings with high-temperature wheel bearing grease, working as much lubricant as possible between the rollers and cages if a bearing packer is not available. Clean all old grease from the hub, position the inner bearing in the inner cup, and install a new grease seal using an appropriate seal driver. Carefully position the hub and disc assembly on the spindle, then install the outer bearing and the adjusting nut. Adjust the wheel bearing, install the locking hubs, and then install the caliper(s) and wheel(s). Finally, lower the vehicle and tighten the lug nuts to the specified torque.