well after sitting for 35 years i changed all the brake parts except the pressure valve and its bad.anyone know where i can get one new or a good used one for my 71 mav with drum brakes. thanks john
There are places that can rebuild yours. Look in Hemmings. I had mine done. I can't remember the name of the place, but I gound it in Hemmings.
Speedway motors sells a proportioning valve its actually a GM style but, it can be used if you have no other choice also check though some of the bronco old parts suppliers I have a few somewhere around my shop I will try and compare them tomarrow.
its a real simple thing. you can probly open it your self, clean it up inside and put it back toghter. whats it doing that you think it does not work.