20210107_131124.jpg
20210107_130620.jpg
It's a plastic seat where the o ring parks.
How's this explosion above. Note the two different sets of two screws that go through the valve the bass the two black ones are what's holding it to the manifold the two tapered head screws hold the body of the valve together itself.
20210107_130540.jpg
There's multiple leak points here that show up in numerous ways. I think yours is leaking from this O ring and seat when it's resting that's what's sealing it.
20210107_130641.jpg
Flipping it to show the bottom the little o-ring the inner one on the bottom when it leaks goofy things start happening stuff becomes Haywire that are unexplainable these are the kind of leaks that's schematics don't help you with when are starts going backwards feeding back through.
The norgren's themselves depending on how they leak makes things Haywire weird too, so do brake relays.
The outer o-ring on the bottom when that starts leaking you'll just hear it right there at the Norgren Air manifold it's probably just loose. So mark 1 c-clip and 2 of the 4 screws is all u loosen, the 2 tapered head screws dont mess with them. Unless u want to take the old one apart.
I think the cost of two of the coil and valve assemblies will buy you the whole manifold with all five of them so price at both ways you guys are always asking about spares and like to have them these are good spares to have in a Prevost motorhome