Hy Charlemagne65, welcome, if you clean the outside mating surface of the drum/hub (the part the wheels sit against)you will probably find two or three countersunk slotted screws that will need to be removed before the brake drum can be separated from the hub. These screws can be tight and stubborn, if you have a hand striking impact tool that is the best thing I have found to remove them, some people advocate heating them before attempting to remove them, good luck, hope that helps.
