Dumb brake questions

I am transplanting a 1983 brake system into my CJ5. There are two ports on the assist as you see from the photo. The cj5's brakes currently in the jeep have a T joint - one in, one to front and one to the back brakes. My questions are can I hook up only one port and block the other one? Or does one go to the front and the other to the back? In that case which one goes where?

Thanks for the help.

 

My title is 1971, but the frame numbers show a 1966. That must be the reason for the problem. I never know what to tell people when they ask the year of the jeep. Thanks for the help.

 

Just what sparky said. I used one a little newer. Mine is from a '84 S-10 Blazer.


http://groups.msn.com/ScottMilliner/scottsjeeppictures.msnw?action=ShowPhoto&PhotoID=105

 

Its heart is still a 66

 

The 83 cj has disc brakes up front and drum in rear. You need the dual m/c and proportioning valve to actuate the two different braking methods.

Changing to a dual master cylinder is not a big deal, but it is not a simple bolt in either.

There are kits available to do it, or perhaps you can find someone who has parted out a 68 - 71 cj and has the bracket.

Another option is hanging pedals, but that is a whole different ball game in terms of work required.

There are people on this site that have done disc brake conversions, and they might be able to pipe in and give you a heads up on what is involved.

 

Hanging pedals and dual m/c are already in the jeep.

 

Can I get some clarification on "move the front brakes in".

 

No disc brakes on the front I still have the drums up front for now.

 

Sorry you're correct, I should have been clear on the front brakes.

Proportioning valves? Going to need some direction on this one. What do I need?

 

well first of all u need to make sure about check valves. with drums u need to keep 10 psi in the lines to keep the boots seated other wise they will leak and u will lose brakes. that mc looks like i doesnt have any built in cause they would normaly screw in to the mc so u will need 3 parts i think...
u need 2 inline check valves for drums theyll say 10 psi and u need a proportining valve....the check valves go inline to both front and rear and the proportioning valve goes in the back line...i like adjustable proportioning valves cause the jeep isnt stock anymore so its ood idea to be able to adjust it.
the proportioning valve looks like a block with an in and out and has a knob.
the check valves will look like a coupler with a big body.
both can be gotten through summitracing.com for pretty cheap....

 

If this is a built in check valve in the mc, mine has one like the one in this photo.
Where does the line go that is hook onto this valve?

 

Thats the vacum line for the brake booster. It should go to the intake manifold

 

yeah thats a vacum check valve. and i made a mistake they call them Residual Valves witch keep preasure in the lines, drums need 10psi to stay sealed.
ok u need 2 residual valves one for front and one for back both with 10psi.
they go in line with the brake lines. and the back needs a propotionig valve to lower the preasure so the rear doesnt lock up before the front.


this goes into the mc then u run line to your brakes you need 2
part number on summitracing is WIL-260-3279 they are very high quality


this is the adjustable proportioning valve and it goes in the brake line to the back. part number is SUM-G3905

both are high quality parts and youll need them to use drum in the front.
and the propotioning valve will help you balance you brakeing preasure
need any more answers ill be watchin this thread.

p.s. i just spent a couple of weeks figuring out brakes for my cj and learned way more then i need to know.....glad i could help...

 

The correct term for the check valve mentioned is a "residual valve". You need one for the front and one for the rear, both should be 10 psi. A proportioning valve may not be needed since you haven't swapped in discs. If you do, a single inline valve to your rear brakes can be tweaked to prevent rear wheel lockup, you won't need the more expensive dual valve. Check here for info and all the parts you'll need. www.inlinetube.com

Had a patient to do while I was typing the post, so the info is redundant, but the website is the best I've seen for brake products. They even cater to us jeep junkies w/ prebent sets in steel or SS w/ the coil wraps and all.