If the shoes can move far enough to let the adjuster get cocked, the brakes aren't adjusted properly. You need to seat the shoes firmly against the drum with the adjusters, and then back off only enough to allow the wheel to turn. If the drums are way oversize and/or the linings are badly worn, it might require using up most of the adjustment threads just to make that happen. Look at the wear on the left lining in John's photo, and how much of the adjustment thread is exposed. Huck brakes have a nasty habit of wearing out only one lining while the other one will look almost new. Back in the 1950's, Dad had to watch some of his mechanics closely to make sure they didn't do a one-shoe brake job and hide the other new one. After a few of those jobs, they had enough new shoes to do a brake job on their own car, or do a weekend job for somebody else without any parts cost.
Jerry
