Thread: Proportioning Valve? Dual inlet/outlet vs Single inlet/outlet

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AzDon,
Is it a stock setup, or did you switch it to front disc's?

The factory 1968 drum/drum master will have the residual check valves built into the master, and have a failure block (sounds like what you see) When you get a leak it will move to the low pressure side trip a switch which will turn on the light on the dash.
You should add a porportioning valve to the rear brakes, if this is a none factory setup, because a drum/drum setup did not come with one!

A combination valve is both in one, plus has metering valve to the front wheels.

Picture is of what you have now, and if it is a factory disc setup, there should be another block in the rear line after this block, to the rear brakes which would be the proportioning valve.

The other picture is of a combination valve with 5 lines.

Pat