Dont use a hammer and pry bar! there is a little oval slot on the axle side of the drum. If you use 2 flathead screwdrivers push the smaller one in the hole and you will see a ratcheting wheel in there. Spin the wheel the opposite way it would ratchet that will release the pads. Look at the one you already have off and this will make more sense.
I was assuming he had already tried that. When I had to do that I had already backed out the adjuster.
