bleeding new system

[colorado71]

Hello, just converted my 66 to power and front disc brakes. All componnents are new, having a hard time bleeding the brakes. i have bleed the master cylinder but cant get fluid p[ast the porportioning valve. any ideas. possible bad valve? thanks.

[fordman]

is it a F100 or F250? and the valve is new right? it is a actual proportioning valve and not the original pressure differential switch (distribution block).

[colorado71]

Yes, all the lines, valves, wheel cyls and calipers are new. it is an f100 2wd. rear brakes are 1966 the rest is for a 1979 f100 master booster etc.

[fordman]

if it wont come out of the valve then the problem is in that valve.

[colorado71]

thats kinda what i was thinking. suprised a new valve is bad. but i guess it can happen.

[fordman]

my thoughts are that the o rings may have gotten lodged by then gettign torn a lsight or having excess rubber flakes on them and wedging the valve shut