residual valve ?

[akitagandy]

Is there an in and out on residual valves?

 

[der Spieler]

I don't think so. I just checked out an article I have that appeared in the September 1996 issue of Street Rodder covering Brake System Valves and it didn't indicate that the residual valves were directional. I think if they were they would be marked "in" and "out" or have an arrow or something.

 

[putz]

I would have to say yes by this pic

 

[Duke]

Yes, they are directional. They allow free flow in one direction and in the other direction they act like a spring loaded poppet valve or relief valve allowing the pressure to drop to a preset level to retain the set pressure in the line. Put it in backwards and you will have less brakes.

 

[akitagandy]

The ones I have are marked 10lb and 2lb OK I found the marks,can barely see the arrows (old age)

 

[akitagandy]

one more ? The proportioning valve before or after the rear residual valve?

 

[der Spieler]

I stand corrected. I had the Wilwood valves on my T but it has been so many years since I built the car that I had forgotten if or how they were marked.

 

[Duke]

The proportioning valve goes between the master cylinder and the residual valve. On your picture of the valves I didn't see anything showing direction, but I can't see the whole valve. Some will say in and out, some have an arrow showing direction. If you have the arrow a easy way to remember witch way is the arrow points towards the brakes. A few will be marked with a triangle - the triangle points in the direction like an arrow.

 

[Duke]

One other thing, I hardly ever use residual valves. Most times they really are not needed unless the master is lower than the brake cylinders. I have seen were they caused the disc brake pads to drag. It depends on the type disc you have.