My dryer drum wont turn if I stop it after it has run for awhile, if I let it cool down It will start right up. I popped the top and the drum was a little difficult to turn, but after a few manual turns, it started right up. The reason I stopped it was because it was starting to squeak like a bearing was getting ready to go out. I'm not sure if I need to replace the drum rollers or the motor.

Can the motor be oiled, or will it have to be replaced?

Clamp vice grips on the blower shaft, then turn the other end of the motor clockwise with a pipe wrench, jerking it helps. If the motor bearings really overheated the motor shaft, you might have to chop the old blower off with a wood chisel, or a small hatchet, just put the motor clamps back on when you do this.