Eng air over builds pressure, air dryer constantly releasing - Printable Version
+- Newell Gurus (https://newellgurus.com)
+-- Forum: Technical Discussions (https://newellgurus.com/forumdisplay.php?fid=3)
+--- Forum: Air Operated Systems and Leaks (https://newellgurus.com/forumdisplay.php?fid=33)
+--- Thread: Eng air over builds pressure, air dryer constantly releasing (/showthread.php?tid=5156)
+- Newell Gurus (https://newellgurus.com)
+-- Forum: Technical Discussions (https://newellgurus.com/forumdisplay.php?fid=3)
+--- Forum: Air Operated Systems and Leaks (https://newellgurus.com/forumdisplay.php?fid=33)
+--- Thread: Eng air over builds pressure, air dryer constantly releasing (/showthread.php?tid=5156)
Pages:
1
2
RE: Eng air over builds pressure, air dryer constantly releasing - Nebster - 10-23-2019
Good point -- we should definitely be inspecting everything downstream for any consequences.
The safety valves on the tanks are set to go at 150psi. Best we can tell, they have not triggered. I am not sure whether I can just carry one spare in case I need to replace one of them, but it's worth looking into. (I don't know how easy installing one would be.)
Our height control valve that is causing trouble is an electric sensor, so there is no air run to it. It sends a signal to the solenoid on the six pack, and the air is routed from there instead of up to the HCV. So although the HCV wouldn't be harmed, it's entirely possible we have some flaky behavior at the manifold.
Given how many fittings/hoses were damaged... it's possible that the overpressure caused them all, or simply caused old hoses and dying fittings to give up. Maybe I should think of it like a "stress test." Everything that survived is now proven!
RE: Eng air over builds pressure, air dryer constantly releasing - DK on the road - 10-23-2019
The 1/4" line that comes out of my filter dryer in the drivers side tag axle had also been damaged prior to all of my problems (see original post). I had backed my coach to the left, up a curb into a driveway making a hard right with the wheels. In doing so, I believe that the steering axle tucks in and gets close to the air filter dryer and rubbed on this line and broke it off.
I also elevate the coach prior to backing, to clear a curb and low hanging items under my coach from making contact.
Doing all of this, the coach must be twisting, wheel is raising, turning, all very close if not past design limits that allow this contact to happen. I would stop and take a picture and share, but I'm holding traffic both directions at this driveway and nobody would be very happy with me, except a few Newell Guru's
I only fixed that line, thinking that would be all that I would have as an issue. My first post here, is the lesson learned from that incident.
I have not repeated this backing in the same way since.
RE: Eng air over builds pressure, air dryer constantly releasing - Nebster - 10-24-2019
My 1/4" line is tied back pretty far away such that I don't think the tag could touch it in any orientation, although now you've got me curious.