Hi Kevin,You most probably have a wear ridge on the drum,look on the back plate you will see a rubber grommet...........

Pull that out & look inside with a torch & you will see a star wheel that adjusts the brake shoes................................

Drum off (Sorry pic quality is rubbish)..................

To further aid removal there is a tapped (M6x1.0mm)hole,wind a bolt in & tap the disc at 180 degrees

Reassembly is eased if you turn a chamfer in place of the wear ridge
