Hi, Vaco, How to take the drum off, Is in the centre of the drum you will see a dome cap, Use a screw driver to lever the cap from the drum, Then you will see a 22m nut, on the nut there is a locking cap on it, lever back the metal fingers from the nut and pull the cap of the nut, undo the nut with the 22m socket undo the nut anti-clockwise, then your drum will come off,