Help asap proportioning valve issues

[bestneverrest1967]

i recently changed the calipers master cylinder and brake lines for my 67 ford it has disc brakes in front and drums in the rear it was running fine before but the calipers were locking up on me so i changed all the brake components i recently installed a proportining valve after market for disc brakes up front and drums on the rear while i was installing the valve it seemed the previous owner had them installed wrong or my new valve works differently after i set it up the way the previous owner had them the brakes kept locking up so i checked the lines and they where set up wrong the rear was put at the front and the front right tire was hooked up to the rear i dont know if this would keep locking up my brakes in the front not the rear i am at a lost and need some help i hear it can be the brake booster but im not too sure

[forrestbump]

What application is your "after market" proportioning valve for? Be specific and if you don't know, that's OK, but tell us all you know so we can help you.

You can't mix and match parts as they were engineered as a "system" by the great minds in Dearborn.

[bestneverrest1967]

it is a right stuff proportioning valve aftermarket from jegs its meant for disc and drum applications i am stumped i have to fix the lines that are put wrong first and im really hoping thats the problem a couple hundred bucks here and there really hurts

[forrestbump]

OK, so you got it from Jegs. Now what does Jegs "say" the application is? In other words, is this a proportioning valve for a '67 Mustang? '65 Galaxy? F100? What Else does it "work" on?

Need that information... if your proportioning valve is for a lighter vehicle than your F100, you've only started to see trouble, there will be more if it's the wrong one.

[bestneverrest1967]

it didnt even list ford when i spoke to jegs they told me it was universal

[forrestbump]

Opinion here... Ford has some pretty GREAT engineers on staff whereas Whizzbang Joe's Proportioning Valve Co. doesn't! So who do ya think can engineer and build a better component within a system? Hmmm... Ford maybe? Thought so...

Time to roll up your sleeves... Now what I'd recommend you do is find a pic-n-pull yard near your location. Find a '73 up to '79 F150. Crawl under it and remove as much of the proportioning valve system as possible. That would be hard brake lines, flex lines, the proportioning valve and all fasteners that are part of the system.

What I'm recommending you do is replace the "universal" proportioning valve with a genuine Ford unit that was engineered for an application similar to your F100. While you're at it, take notes, draw diagrams and sketch the lay out of the donor F series brake system so you can properly install it in your truck.

Is this your DD (daily driver) ?

[bestneverrest1967]

i am going to see if the flipped connectors in the proportioning valve will fix the problem and also bleed the brakes if all elses fails then im at a lost it is my dd for now im graduating this year and need it to get to work

[fordman]

is this a F100 or F250? the F250 would have a seperate valve in addition to the distribution block . and requires a special tool to bleed the brakes with. i am unsure if the 67 F250 had disc brakes orignally. but i know the 68 F250 could have them. also the 73-79 disc brake proportioning valves require the use of the special tol to hold the little pin out while bleedign the brakes.

[forrestbump]

i am going to see if the flipped connectors in the proportioning valve will fix the problem and also bleed the brakes if all elses fails then im at a lost it is my dd for now

The first part of your response sounds like good thinking on your part...TRY it and let us know.

OK, got it about the dd stuff too. How about taking the bus if there is one? Y'all got any buddies you can hitch a ride from until y'all get this thing sorted out? Swallow your pride and ask, it's only temporary...

im graduating this year

Great, good job and we all want to see you do that.

Please keep us updated. Godspeed...

[bestneverrest1967]

This is an f100 with disc in front and drums on the rear the proportioning valve should work as soon as i get the lines put were they have to go the truck came with drums on all four from factory but the previous owner installed disc brakes and worked fine till one day the caliper got stuck on me while driving so i went ahead and installed a master cylinder when that didnt work i did the brake lines then the calipers and im down to the proportioning valve if it doesnt work from here im stumped the jegs part did not have a diagram on how to install it but i find a similiar one and it seems the lines are connected differently from the stock ones i can use my pops truck but i dont want to get too comfortable using his and i really want to get my bump on the road

[forrestbump]

Sounds like you've got your bases covered for temporary transportation (Thanks to your Dad, return it to him Clean & Full of Fuel!) and your plan of attack for your proportioning valve repair.

Your last post had the most detail yet, Thanks for filling in the details!

[70_F100]

What year truck did you get the master cylinder for?

If, by chance, it's a drum/drum master cylinder, there's probably a check valve/residual pressure valve in the port to hold a bit of pressure in the lines. That would need to be removed for disc/drum use.

Just my

[fordman]

[bestneverrest1967]

got done installing the proportioning valve the way its suppose to be installed and its still not a no go i wish it was the incorrect master cylinder so i could just swap a new one but i think i am going to take the master cylinder back and get a new and see if i can get my bump on the road it has to be the master cylinder becouse the front brakes are the only ones to lock up and to brake its extremely hard i test drove it parked it right after jacked the truck up and both wheels are locked another day another problem

[fordman]

you did remove the old distribution block (pressure differential valve) didnt you? the proportioning valve replaces that piece. i was also wondering if you could post a link to the valve you bought from jegs. i looked but i didnt exactly see which one you may have bought. http://www.jegs.com/webapp/wcs/stores/s ... ning+valve

you could also have a line blockage or air in th eline. the rubber brakes hoses could be collsping. the bleeding procedure may have not been correct withthe opening of the pin each cycle of the bleed that was made to the front calipers.