Willys! Rare now.
Lockheed Brakes - a lost art.
Use the 2 cams on the back of the backing plate to back the shoes off - the regular adjusters.
If you see a big nut in the center of the drum, remove the cotter pin, then the nut, then the washer underneath. The threaded thing sticking out is the tapered axle. Remove and clean the axle key.
Then you'll need a puller - a big one that pulls on the studs and pushes on the axle end. Make sure you put it on even and tight. Then pull it off.
The drum will be stuck on the hub. The studs hold it on.
When putting it back on, clean and lube the tapered parts - axle and hub. DO NOT PUT THE HUB BACK ON WITH THE KEY IN PLACE. Slip the hub on over the axle all the way to seat it - make sure it's on all the way.
THEN, after the hub's on, line up the keyways in the axle and hub and slip the key in. Make sure you have the cut off corner on the key toward the center of the axle (away from you) and and pointing toward the axle, not the hub.
Putting it back together wrong you can lose a wheel or at least do lots of damage.
They never were decent brakes even when new. If you replace the linings, ask for the cheapie linings - not the "good" ones.
The so called "good ones" or "lifetime" are way to hard - they won't stop very well. The cheapies are soft, meant to wear fast - but they stop!
What are brakes for anyway?