brake proportioning vave 73 roadrunner
- Thread starter rm2173!
- Start date
Vaanth
Well-Known Member
It's not a parts breakdown image per se, but the 1973 factory service manual has a sectional diagram of the brake system combination valve as shown in the following image:
The service manual has detailed descriptions and testing procedures of the B-body and other models in the "Hydraulic System Control Valves" sub-section of the "Brakes" section. Chrysler did not intend for the valves to be rebuilt, so they did not provide service parts, nor internal service information.
Last edited:
Vaanth
Well-Known Member
I have not disassembled a cast iron valve fully yet, but it might be removable as follows:
1) Remove the pressure differential switch.
2) With a blunt probe, ensure the pressure differential piston can move back and forth. If not, it may be stuck due to corrosion, or long term sitting in place. The iron valves can suffer more from corrosion than brass.
3) Remove the metering valve assembly and any parts behind it.
4) Remove the brass tube seat on the rear brake port.
5) Using a long thin drift, punch, or rod, push the piston from the metering port side out of the rear brake port.
Alternatively, you might push the piston out by blocking all ports except the rear brake port and metering valve port, then use air pressure or grease gun pressure (with an adapter) to remove the piston.
If you have not already, you might want to peruse the articles at Muscle Car Research for information. They do not list this specific valve, but they show details of similar valves.
Last edited:
Sixpactogo
Well-Known Member
The piston you are referring to is called a shuttle valve. You can push it out from the end with a long small punch. Here is a picture of it. Also a video of how to rebuild it. It takes 3 kits for all that is available for them. I have rebuilt a couple of them.
Similar threads
