They are locking up in gravel after barely touching the brake pedal.Adjusters are backed off.Any ideas?
Why are the adjusters backed off?
When you put the drums on, there should be some drag. If the shoes are pulled away from the drum because the adjuster is backed off, the lockup is happening because the slack is being taken up suddenly. (I can picture it better than explain it).
Have the shoes ever been correctly adjusted?