I have a 69 cougar that I am replacing the proportion valve on. Got my new one from WCCC. Everything is great except the new one does not have the additional “adapter” on the port that connects to the front bowl of the Master. I don’t know if I omit it, or put it on. It looks like some type of check valve or something. Anyone know if I put it on the new one or just leave it out?
You most likely have the wrong steel line, or the mast cyl.
Master cyl takes a 1/2 wrench at front & a 7/16 at rear.
believe the ones at the valve is also 7/16.
No adapter from factory
I could be wrong as to your application, but I have a ‘72 xr7, and the large bowl is for the front brakes, and the small bowl is for the rear brakes. Philosophy being that you REALLY need the front brakes’ stopping power, hence, more fluid reserve for when you need it. If I’m wrong, then, one day I’ll die from giving out bad information.
I put the adapter back on and the brakes are working perfectly post the painful bleed process. thanks for the help everyone.
I just rebuilt a few valve/block units I have & found this brass “adapter” on one valve/blocks. So, Im wrong!
Looks like they were factory as the FoMoCo # is C8AA-2B363-A
Not sure what happened in production that required this piece.
Its is straight through, nothing inside. Same size both ends.
maybe to help that line clear the other master Cyl line?
From the MPC - 1965 through 1972.