brakes

[R.Smith]

Why does the passenger front brake on my 70 250 w/discs sometimes fail to realease after I brake hard? It's happened 3 times. Each time I've had to crawl under the truck and pull the little pin on the proportioning valve thing and it releases. The first time it happened was after I put on new front hoses. I've run about a gallon of fluid thru the lines bleeding the brakes and I thought I'd fixed it but it happened again yesterday. Thanks.

[fordman]

it sounds like the valve or caliper is dirty sticky.that little valve on the crossmember isnt too hard to take apart and replace the o ring and clean up.

[Hemmi06]

I had similar issue but both breaks would stay locked. It was the master cylinder having air in it. Might want to check that and bench bleed it?