Arrival of New Proportioning Valve

This is the original distribution valve from my '67. There are no identifying marks or numbers cast into the piece. The vehicle was originally equipped with non-power drum brakes. Since the vehicle only had drum brakes, the only function this served was to distribute brake pressure to each of the drums.




My new proportioning valve arrived in the mail on Friday. The piece is produced by MBM (part# PV6070FD) and is modeled after the 1970's style Ford disc/drum unit. The piece includes a valve to direct more of the brake fluid to the front discs. It also includes a metering valve which limits the fluid to the rear drums to avoid lockup.

In the picture below, you can see the new valve along with a few additional parts. These parts include the original bracket I removed from the distribution valve (and painted), the switch which came with this piece (2 posts) beside the original one (1 post) which I plan to reuse, and finally the red part is a 10lbs residual presure valve.



The residual pressure valve is installed in the rear brake line. It is used to hold 10 pounds of presure on the rear brake system. This slightly works against the springs in the rear drum to keep the shoes close (but not touching) the drums. When the brake pedal is pressed, this ensures the rear brakes react as quickly as the front brakes. I'm not sure were I'll put this piece as it will likely standout under the hood.

The picture below shows the assembled new part. The only tricky part was using a hammer to 'smash' a brass bar which extends through the original bracket. This mimics how the bracket was attached to the original distribution valve. I scratched up the braket a little during the process and touched it up. I ended up with a little too much paint on the bracket but its not visible once installed.