You will probably need to use ox acetalene torch or mapp gas torch. It has to be hot enough to expand the center of the drum propane will not be hot enough. Heat between the studs on the front of the drum. Dont heat the studs or the axle face. If you get it hot enough the drum will expand and break loose. If the shoes are worn out so they are not contacting the drum it should come right off. If shoes hung up you may need to get a slide hammer with hook ends to grab outside edge of the drum. Hammer lightly between the studs may help loosen not to hard as you will break the drum if you hit to hard. Before you hammer near the studs put the lug nuts back on to flush with the top of the stud so that you dont bugger up the stud threads. I would wear saftey glasses when heating the drum have not had one explode but they do pop with gusto when they come loose.