Locked up breaks

[Jimmy Wallbanger]

So my breaks lock up on e I push in the pedal and stay that way . Manual breaks Chevy dual res master cylinder typical full size ford discs up front . The rear are drums and seem fine . Did this when I bled the breaks a month or so ago but released while setting now it's locked again! Can stand on the pedal and it moves maybe 1/8 can feel the fluid so it's not the new master

 

[Bamamav]

Check the length of your pushrod. If it's too long, it will hold pressure in the master cylinder.

 

[Torchie]

Are you using a proportioning valve?

 

[Jimmy Wallbanger]

I am usin a proportiioning valve not fully adjust since its not wired , ill check the push rod but the petal and plunger only go in a hair so I don't think that's it have resid valves too disc and drum

 

[Old Iron]

Sounds like the front rubber lines have collapsed internally.

 

[Dirtyrat]

I am usin a proportiioning valve not fully adjust since its not wired , ill check the push rod but the petal and plunger only go in a hair so I don't think that's it have resid valves too disc and drum

Double check you have all the ins and outs plumbed correctly on all the residuals...

 

[Jimmy Wallbanger]

Front lines are new braided stainless

 

[sgtpontiac]

Back to the basic's guys.....

What has been changed.....if you crack a front or rear line, does it unlock? work your way from the pedal to the wheels....has to be a fluid pressure issue......just start cracking lines from the master cylinder to the wheels, whatever releases them....Bob's your uncle!