'80 CJ brakes

Finally got all parts to finish re-packing front hubs and replacing all the brake parts (new brake hoses and crush washers, brake line and re-built calipers). Since this is the very first time I have ever done any of these things...it is both new and exciting to me.

After some reading on the forum I am seeing something refered to as a proportioning (?) valve I will need to address in order to flush (bleed) the lines and replace brake fluid.

Question, do I need the special tool?

Is this a general parts store item...who may have such an item (NAPA, etc.).

Would this tool be useful for other vehicles so that I can work on the brakes at home ( Ford Taurus, F-250, Chevy Cavalier).

Is there an alternative, like using a "C" clamp, and, how would I set the clamp to defeat the "P" valve for bleeding the brakes.

Since I only have Sundays right now to finish up this portion of the project, I don't want to have to run to town for, yet, another small item to complete. I may do some calling around to see if anyone knows quite what I am talking about.

I value your all's opinion(s).

Thanks again for any input.

Dan

 

The proportioning valve is a junction block. Follow the lines from your master cylinder to this block. On my '79 cj5, it's on the inside of the left frame rail. There's a little rubber coated button on the front (facing the front of the vehicle). This button has to be pushed in throughout the bleeding process. Apparently there's a devise available to do this. I don't know how hard it is to find. It's listed in the Haynes Manual.
I fabricated a small steel pivoting pusher that I can bolt to the frame, tighten it just snugly, then pivot the push finger to press the button while I bleed the brakes. It works like a charm.
A C-clamp or hose clamp might work, but it may be hard to set it up. Or you could get a very patient friend to hold it in for you!