Now brakes are locking up

[greygoose]

After all the problems I had with the carb and after getting that problem solved.the brakes have started locking up,so bled the brakes and on one of the calipers no fluid would come out so i changed that one.It started work find for a short drive then it started again on the same side or one side is harder to turn than the other.So my question is what next.Should I replace just the booster or master cylinder as well or could the be something else that's causing the problem. Thanks

[Schralper]

if it's only 1 brake then replace the caliper or wheel cyl
if it's both frt or rr then check prop valve and master

[greygoose]

Both front wheels locked up,but I can turn one a lil,....so I can rule out the booster?

[greygoose]

Ok as of yet,I haven't touched the truck after seeing both front wheels locked up.This morning I went out and fired it up and the brakes were good.So does this narrow it down between the 2 prop valve and the master cyl. Thanks

[leftcoast66]

If both are locking up, then yes its going to be in the bias and therefore in your proportioning valve. If your master cylinder was acting up it would have some affect on the rear's also since their all fed from the same rod in the mastercylinder.

[greygoose]

Thanks guys for the help,but after changing the master cylinder,prov valve,and caliber.The problem ending up being the front rubber brake hoses.lol