Unless you're planning to replace the drum for some reason, I can't think of why it would be necessary to remove it. If you need to machine the drum, a good automotive machine shop will have the correct adapters to use the bearing cups for centering on the brake lathe. For any other operation such as degreasing, sandblasting, etc, just protect the bearing cups and blast away, or drive the bearings out and reinstall or replace them later.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!