08-15-2018, 08:15 PM
The primary air leak appears to NOT be in the brake system although the check valves in the brake system could be causing it to leak down too fast also. You are losing nearly the full air supply in the non-brake air circuit in two minutes without leveling on and not much slower, maybe 3 or 4 minutes with the leveling system on. That is a MASSIVE air leak.
As soon as you shut down the engine, can you hear the air leaking outside, especially back by the engine? That is stunning!! I have never seen an air system leak down 60+ pounds in two minutes! Certainly a large fitting that has split or come off, a split in a large air hose, or even a split/hole in the wet tank itself could cause a leak that large. I would NOT think that a 1/4" air line could leak down that quickly. An air bag that has come unseated might leak air that quickly. Still way too many possibilities at this point but it looks like focusing on the non-brake systems first you be your best bet.
As soon as you shut down the engine, can you hear the air leaking outside, especially back by the engine? That is stunning!! I have never seen an air system leak down 60+ pounds in two minutes! Certainly a large fitting that has split or come off, a split in a large air hose, or even a split/hole in the wet tank itself could cause a leak that large. I would NOT think that a 1/4" air line could leak down that quickly. An air bag that has come unseated might leak air that quickly. Still way too many possibilities at this point but it looks like focusing on the non-brake systems first you be your best bet.