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Well, I just ordered 3 new ones. If the wet tank does indeed need one I will eliminate the other three first and then for sure one of the original check valves has to be good and I can find out which by trial and error testing on the wet tank with the three I just changed out. Jim

Yes. A2 with the 8.3. Horrible engineering.

Yes! super nice pictures and explanations. Thank you so very much. I was looking earlier and that is not what I assumed was the check valves. So greatful for those pictures and directions where to find them. I will take all of them down Saturday and investigate. Can they be disassembled or are...

Thank you. I had already been through that drama. That was a beast to get back together. Mine was stuck open and no air pressure at all. I am hoping that is not the case again but heck, I only put about 30 miles on it since that task. Mine had that same goo. It was sticky too. I did take the...

I noticed some GP sites actually video the vent hose. I would trust that better so only one opening. If they take the cap off there is the vent hose plus the cap lovation open and you arent seeing it all. Just my $0.02 U.S.

Thank you very much. Well, it was a no go. Fanned brakes one more time before pulling out and it wouldn't build pressure. Drained tanks with it running and they completely drained to zero. I'm over it for the day. Gonna get a new governor and see how that goes. Classified search now. More spare...

Thank you

Okay. Running engine at idle this go 'round and full pedal. Primary 128 to 118. Secondary 128 to 122. I did hear the engine (actually compressor) get quiet when dryer purged. It is actually doing pretty good now at cutting in. Odd. Just fanned it to make low air buzzer kick in and it cut in...

No rush. I've been off and on working on this beast since I got it in mid April. Sitting is hard on any vehicle. Especially after so many private's fingers in it and then resting in Louisiana till GP moved it.

Oh. I see. Didn't think of that.

I surely cant hear it going down the road. I have noticed it sounding like noisy engine when stopped right before it cuts out. By the way, thank you very much for going out of your way to help me. I really appreciate it as well as everyones help on this site. You'alls good folks!

Hmmm. Just aired from 60 to 90 in 55 seconds at 1100 rpm. Primary dropped from 120 to 109 and secondary didnt move on first pedal press with engine off. Second full press brought primary to 92 and secondary to 113. Third press 81 primary and 109 secondary. All presses were as if normal braking...

Whoa. Yours drops 30 with one press then 15 more on second. I aint losing near that much, just not building once I do lose. Okay. Im firing this sand dune up and checking again. Right now. No rush of air and no loss on hold.

Theres really not much one can do inside. I just made sure all ports were clear. Went below that adjuster bolt by removing a snap ring but it was clean and oily(manufacturer's grease) under there.

Heck, I cant tell over the noisy engine. Dont really hear a change like when its behaving properly.

Crawling under as soon as I put this phone down to start tearing into them. Can I see/clean the rust/gunk?

This is what it does. Made me think treadle and chambers/diaphrams are good.

If I remember right it should (and mine does) lose 5# +- per pedal press.

It still cuts out at 130, where I last set it. Forgot to mention I bumped up a bit.

Not a new gov but took it apart and it looked nice inside (from what I could see). I am considering getting a new one though.