https://www.classiczcars.com/forums/topic/45461-parts-for-oem-np-valve-and-brake-indicator-switch-unit/

While this forum post is an excellent read, it still doesnt help me get any closer to actually rebuilding the stock NP valve. Any suggestions where one would find new O-rings, Y-seals, lip seals, and cup seals?

 

Edited April 11, 20224 yr by 123456

White Post Restorations – Fine Automobile Restorations & Brake Cylinder Solutions 

My buddy used their services to repair brakes on a 30's Packard. 

On 4/11/2022 at 12:56 PM, 123456 said:

https://www.classiczcars.com/forums/topic/45461-parts-for-oem-np-valve-and-brake-indicator-switch-unit/

While this forum post is an excellent read, it still doesnt help me get any closer to actually rebuilding the stock NP valve. Any suggestions where one would find new O-rings, Y-seals, lip seals, and cup seals?

 

Can anyone decern if the cup side of the cup seal on the piston rod is facing toward the coil spring side or the valve body? I am currently rebuilding mine and the service manual does not specify orientation. 

20 minutes ago, Deltron540 said:

Can anyone decern if the cup side of the cup seal on the piston rod is facing toward the coil spring side or the valve body? I am currently rebuilding mine and the service manual does not specify orientation. 

In any hydraulic system the cup  side of a seal faces the pressure of the system. That way the pressure forces the seal against the bore and rod.

Edited June 16, 20224 yr by Racer X