What I did with my 1 Ton rear drums was smack them on the flat surface between the studs with a good hammer. Eventually powdered rust began to emerge and that was a sign that the rust bond was breaking down. Then it was a case of turning and pulling and sometimes very lightly tapping on the drum. My truck had been sitting in the grass behind a barn for seventeen years and drums came off without heat. I would not use a puller or any excessive force on the drums.
