if i remember correctly, you need to remove the cap and the nut (which is staked in) then the drum will come off. BUT if it wont come off easily then you need a pulling tool. the pulling tool hooks around the outside of the drum and has a bolt in the middle that you tighten onto the driveshaft so that it pulls the drum off. i had to get a puller from the local auto parts place for about £20. then once the outside drum is off then you can see all the brakes inside. if you need to take them off, they are all just held on with a series of springs and clips. make sure to take note of how they are fitted or it wont be easy putting it back together.
what it is you are trying to do?
if you have any more questions, just ask.