I may have considered some of the O rings washer seals. It was a TRW.
I didn't notice the vanes only went one way at first either, then I got out my glasses! I feel like Steve!
I just finished rebuilding the vacuum heater/AC switch for Jims car. Talk about intricate! I couldn't do anything without glasses on that thing. I cut it apart, then used #4 screws to put it back together. After all was said and done, I figured out the damn switch worked, some one messed up the vacuum hose routing to each diaphragm. DUH! What a waste of time that was. At least Jim's switch works smoothly now.
President, New England chapter of Coronetaholics anonomous.