I have parts, service manuals and parts for the truck.
In order to access the brakes there is cover on each drive hub held on by 4 bolts. Remove the cover, remove the cotter pin holding the axle nut in place and then remove the axle nut. Once the nut is removed go to the opposite side off the truck and slam (and I do mean slam) against the inside of the tire with a solid bar about 3" in diameter and about 5' long. Turn the tire and continue slamming. The hub/tire/brake drum assembly will pop off.