Dryer Purge Valve and Primary Tank

Replaced the purge valve on my Bendix AD-IS air dryer as it was beginning to stick. Now when I started up the truck, the secondary tank filled and nothing to the primary. I've triple checked the replacement as being the correct part and installed correctly. Once the secondary fills, the dryer purges but no air goes into the primary tank.

I'm really at a loss here. Any suggestions or advice would be very much appreciated.

 

Nope just the primary and secondary.

 

I think the supply tank is a "resevoir" tank that is unique to this dryer. Here is a link to the dryer I have. http://www.bendixvrc.com/itemDisplay.asp?documentID=5916

 

I did not remove the dryer to replace the purge valve, left it on the rig. The tank that is attached is filling, as is the secondary truck tank. There's no air coming out of the primary delivery port of the dryer.

If I have to replace this pig, I don't want to install the same thing if I don't have to. Just need to find one that does what this one does (two tanks, auxiliary ports for cab suspension, heat, etc.

 

That link that I posted showed all that. I remember reading that the pressure protection valves are not replaceable and therefore the dryer would need to be replaced. Just want to make sure that's what wrong with this bugger.