1969 vacuum check valve question

[autoalain]

Folks, below the vacuum tank (breaks) there is a check valve c27306, what does this 46.00 dollar part do?
I have a check valve from another make of car I would like to use, but because I do not have the old one
I have no idea what the process is, I guess it holds vacuum for brakes, but do not know why it needs
a check valve, thanks Mike.

[MarekH]

It holds vacuum for the brakes. Whenever the air pressure in the manifold is lower than in the vacuum tank, the one way valve evacuates any remaining air from the tank/reservoir used to give you vacuum assist for the brakes again next time you stab the brakes. Without it, the amount of vacuum assist would depend on engine load.

A valve from any other car with power assisted brakes will do.

kind regards
Marek

[ianc9]

I think most other cars have valves with just 2 connectors (in and out) on them. If this is the case with the one you sourced then you'll need to stick a Tee connector in the accommodate the pipes to the reservoir and the servo on the "out" side.

[caveman]

Make sure you put the two pipes on the right way around. It’s the difference between a heavy brake pedal (no assist) and good pedal with servo assist. Mine was plumbed wrong for many years before I investigated further and wow what a difference.