1990 Lexus LS 400 rear wheel bearing removal

I cannot seem to figure out how the rear drum/rotor come soff the vehicle so can get the wheel bearing replaced. The caliper and bracket are off, and the bearing nut, retaner and kotter pin are also off. But I can't seem to get the rotor/drum to move. How do I get this off.
I also cannot seem to find any auto repair manuals for this car. Every car I've have owned I get a manual for and now I can't seem to find this particular model. Would somebaody please ehlp me withthis problem? Thank you