[Archived]

Ronald, you have leaks. At this point until you do the research to find what is leaking all you can do is expect the aux compressor to run as needed to keep the slide seals inflated.

It is very premature to even guess the issue may be a Norgren valve or any other potential leak source until you have investigated, but at the leak down rate you describe you are at the point where it is close to possible to hear the leak. That assumes it is coming from a single point. More realistically however is due to aging you likely have a number of leaks ranging from push in fittings, to leaky valves to such things as your slide pneumatics.

You have the potential to empty your bank account if you turn your coach over to someone with the instructions to find and fix the leaks. Your best course of action in my opinion is to seek out a shop that has expertise with both the house and chassis at leak detection and let them “pick the low hanging fruit” meaning to check the obvious and most troublesome spots first. A good example is the valve, regulator, fittings and bellows associated with the belt tensioners. There are other easy areas to investigate and if they reveal leaks, get them fixed and see how much it cuts down on leakage.

You can eventually get a leak free coach but I think unless you find them yourself you are going to be broke getting to that point.

[Bill]

Not sure if this will help Ronald but:

I just had the same experience you did with my Prevost Aux air pressure dropping to zero in about ten minutes after shutting down the engine. Overnight the coach stayed level and belts were tight. I cranked up the engine, built up full pressure then did a walk around. I could hear air leaking from the rear slide. I retracted the slides and turned off the air to the slide seals in driver side bay 3. No more pressure drop. I bought some blue outdoor waterproof painters’ tape at Ace and taped around the outside of both slides to keep out rain. We drove a few days and are now in at Prevost Nashville to likely replace the seal tomorrow. $$$.

Our Marathon Aux air is leaking again. The sewer hose air guage keeps dropping and the compressor runs. I have turned off the air compressor breakers and turn them back on when we need pressure until I can get that fixed.

I guess I got ‘lucky’ and found the leaks right away.

[Deleted User]

Ron,

This cannot end well. You don’t want to have to worry about all these problems in your Tescher coach. I really think that it’s time to sell the coach. You may have to take a huge loss and I am sorry about that but I am willing to take this problem child off your hands!

Sorry, but this is likely my most favorite Prevost of all times and would kill to bring it home!

[Kirby]

Ronald, we are going to be in Albuquerque for the balloon fest as well. I carry an electronic gizmo that listens for leaks, it won’t find everyone but if you have leaks like Jon is saying you will be able to pinpoint the big ones. Your welcome to find us and borrow it if you would like. We will arrrive on Monday the 8th.

[Archived]

Here’s another possibility for assistance in detecting leaks. I’ve never used the product myself, so if anyone else does, it would be great to know how it works out.

“Trace-A-Gas is a 5% Hydrogen and 95% Nitrogen mixture which is non-flammable, non-toxic and safe for the environment. When used with a suitable electronic leak detector, Trace-A-Gas will enable engineers to detect much smaller leaks than they can with Oxygen Free Nitrogen and a leak detection spray.”

Kirby

[Archived]

The gas is apparently available for those who want to follow up on it at one of these locations I think. It is a UK company, but the link below is their list of companies here in the US.

https://www.agas.com/contact-us?region=a-gas-in-the-americas