Drum Brakes & Adjusters - How they work.

[DanD2Soon]

http://auto.howstuffworks.com/auto-parts/brakes/brake-types/drum-brake2.htm

Great animations.  This link is not new but has only been included in other posts and as far as I know never as its own topic. 
Enjoy and share.

[DaveVA78Chieftain]

Thanks for posting that. Great training link for brakes D. 
Not only are the basics of a drum brake covered, but links on the last page address all the different brake subjects (drum, disc, master cylinders, proportional valves,  residual valves, etc.)
e.g.: Like the tag axle issue we were thinking through the other day Re: Hydraulic Tag Axle Brakes