71 Cuda Brake Proportioning Valve Rebuild?

[Total BS]

Hi C-C gang,

I got a call from the resto shop today.  They are reinstalling my brake system and they feel that the proportioning valve may not be working properly as they are only getting fluid to one wheel. As I am a technical dummy, can anyone tell me if these can be rebuilt and possibly by whom. I am trying to keep this resto as authentic as possible and would like to reuse this if possible without having to switch to one of the other non-correct valves that some of the brake line vendors sell. If you have done it please enlighten me.  Attached is a pic of my setup before teardown.  Thanks, Ed

PS, my car is a 383 AT with power brakes, front disc brakes, rear drums

[Chryco Psycho]

the large nut can be remove to access the inner parts , I my attitude is if a human can build it I can rebuild it + you have nothin got lose if it doesn`t work you are still in the same bind

[Total BS]

Chryco,

Thanks.  I found this picture of an exploded view of the valve from a 69 RR.  It looks to me that all there really is is a couple of O-rings and maybe the springs that could be replaced. I think I might give it a shot.

[Chryco Psycho]

Why not !

[Grancoupe]

While I was reading this one thing can to mind. You are talking about the front brakes, correct?. The rear brakes have only one line going to the rear. If this concerned the rear it would not have anything to do with the proportioning valve. Only asking

[Chryco Psycho]

the proportioning valve balances pressure between the front & rear brakes

[Grancoupe]

Doesn't it act as a splitter from left to right as well?

[Total BS]

I am going to take a guess and say that the metering block next to the proportioning valve splits the left and right on the front brakes. I don't have my car here to verify it so it is just a wild guess

[Chryco Psycho]

no , it has to have equal pressure to the left & right & it does Tee it so it goes to both but it is wide open to each side

[Grancoupe]

Cool, Been a while since I touched one of the old systems.