[Boog]

Originally Posted by magwakeenercew2jh

My right rear drum is locking up. Pretty dangerous, really.

New brake booster/prop valve (disc/drum), master cyl. New pads/rotors up front and new shoes with good drums in the back.
Multi-bleedings with no air in the system that I can see in the bleeder jar.

It's the pass rear brake that's locking up, and locked up first *before* I recently changed out a leaking wheel cyl) may be out
of adjustment ????? I don't know.

I *do* know that I've never been able to get a good enough adjustment on the parking brake to make it work properly.

Gotta play with this one. Possibly I have a bad P-valve? I'm not too happy with the overall brake performance compared to my '72.
So maybe it's a crappy booster/m/c/prop valve set up all together.

Or maybe I just need to play with the adjustment on the pass rear drum???

Bill there are a couple of things that will make the drum brakes lockup. Rear end oil on the shoes from a leaking seal will make the shoes grabby and lock the wheel when stopping. And it's possible one of the cups in the wheel cylinder is stuck holding pressure on the shoes. I doubt the p valve is the culprit as both the rear wheels are on the same line from the front so if one side locked the other side should too. Most likely. Check the brake shoe adjustments? I hate to ask but are you sure you have one long shoe and one short shoe on each side? Long shoe to the rear on both sides?