With the wheels and tires off, remove the five or six bolts that retain the locking hub and pull it off. Depending on how the hubs were manufactured, a snap ring on the end of the axle may need to be removed. If you have a drum brake setup, take off the drum; on disc brake models the caliper needs to be removed. The exposed hex nut shown is removed with a big socket after the retaining tab behind it is bent away. Pull the retaining washer out, then the inner nut can be spun off, and the hub assembly can be removed.