BRAKE QUESTION - HELP

[L-ENTERPRISES]

So one of my rear calipers on a 99 F450 2wd 7.4l froze . I bought a loaded set and replaced both sides . Bled the brakes and everything worked fine . A day later I go to use the truck and now the brakes are holding a super tight grip on the front , both sides . I shut the truck off and turn it back on , let it idle for a minute and the truck is fine I start driving up the driway and I touch the brakes again , bam the fronts are locked solid again . Shut the truck off and this senario happens again over and over . I'm totaly confused , is there some type of reset or did I bleed the brakes the wrong way ? Its got me totaly baffeld .

[L-ENTERPRISES]

Help !

[X JBM X]

Air in the lines maybe? Bleed the fronts as well as the rears. Make sure you're using DOT3 fluid.

[melmount]

hhmmm, air in the lines shouldn't cause the front to lock up.
I would first think maybe the rubber flex lines in the front or one of them has rotted inside out and not releasing fluid pressure?? But i dont see how shutting it off would change this? interesting, good luck.

[SButler83]

Drain your power steering system and temporarily start the truck and see if the condition still exists. If it goes away, you need a new hydraulic booster assembly.