[AL]

What you are describing is a situation that could be brought about simply because you have the original suspension system components, specifically air bags and Norgren valves, and they are leaking due to age. If it is cold the bus settles quicker than when it is warm, but the end result is the same. The miniscule leaks throughout the system all combined cause the loss of air pressure and the bus settles down.

Without knowing the service history that is just a guess. As our coaches age leaks develop and the fix can be to find and fix the biggest of the leaks by replacing an air bag, a valve or fitting, or just go about and replace all components and verify all fittings are leak free.

[Archived]

Welcome to PC. Your on the most experienced owner based Prevost site on the planet.

Reading your post the first thing….. Have you just recently had the “new to you” bus serviced ?

Could someone had opened air tanks checking for moisture and left a valve slightly open ?

AL

[Archived]

Chris,

Welcome to the forum and sorry you’re having suspension problems. It’s the nature of the beast and as Jon pointed out, could be bags, norgrens, fitting, etc. It is unusual for the entire suspension to go down, but you could have a host of problems front and rear that are causing all bag positions to deflate. With the key off, I can’t think of any one component that would take everything down.

[Bill]

Addition to the above comments, if your coach is like mine, leaving the leveling on will result in your end result. My unit will not inflate any air bag so each time the coach sees it’s out of level it will dump a bit of air to get level. It will do this again and again in tiny increments and at the end of the day the coach is sitting on the stops.

Now, after searching down, finding and fixing all the air leaks, I level the coach and turn off the leveler. We sit pretty good for several days and sometimes for a week or so. I might tweak it a bit on the second day but usually that’s all that’s necessary. In cold weather it’s very difficult to keep it level!

[Robert]

It was serviced and inspected prior to purchase. All major systems were checked out and repaired at Houston Prevost before heading back to Oklahoma.

Once I level the coach how do I turn off the leveling system? I turn off the coach and that is it. It has the regular Level Low system. No converter auto level or anything like that. The gauges go to 0 on the dash after a period but the bags should stay full with key off as I understand it.

Hoping it might be a simple fix before I take it in for a check up.

Thanks for helping out and I look forward to contributing in the future.

Regards,

[Robert]

If you have the standard lovel low, it’s off when the key is off. You are correct, with the key off, the suspension is locked and the aux air can go to zero and should have no effect on your bags.

[Archived]

Chris,

If you have gauges going to zero and you have the coach settling down you likely have what all coaches experience over time and that is a host of air leaks, few if any of consequence, but when taken as a whole are contributing to your problem.

Having said that however I will say strongly that if you turn your coach over to any service facility and ask them to cure the leaks you will end up with a bill that is staggering. We owners generally look at leaks as an ongoing project and we nibble away at them until we reach a point at which we still might have a few, but we accept them.

[Peter]

I’m not sure which part of the country you are in..however you have a open invitation to stop by and I will walk you through some things and show you how to isolate systems etc or we can take a look at it. As all owners know that if you dont start off with a clean slate with your air system then you will be chasing one leak to the next.

[Bernie]

As mentioned above about the staggering bills, Prevost, Ft. Worth and Houston shops have had mine in several times last year and with (Card Blanche and my approval on costs) to the tune of a fortune and mine is sitting down in it’s barn flat on the floor. It takes a few days in the cold and a week or 2 when it’s warm. All bags, and most valves, fittings and who knows what else have been replaced and still no joy. If I knew somebody that would tackle and fix, I would be on the road a gunning. From what I’ve seen , Prevost ain’t the one and they are to busy to really do the job right. From my prospective. Good Luck. Gonna start looking at my problem myself on air issues.

[Mike]

Bring it up here Glen , sometime . we can find it together stay in bunk house stay as long as you like, you buy the parts and that’s it . Just trying to help out….

[Archived]

I bought the coach in Houston and drove it back to Tulsa. We have had several days in the single digits since I made the purchase. In fact, we haven’t had one warm day. It is 12 degrees right now as an example.

I know in Houston having low temps is not common so maybe it is just a weather issue. It was leak checked prior to purchase but in very warm weather.

You guys are great. I Might drive it to Tenn. for a once over. Never been to Nashville.

[Archived]

Might even head to Wyoming. Taking it on a Spring Break trip to CO so I’ll be in the general area.

[Archived]

Chris,

With that offer by Jeff above ….FWIW I would be high balling to his new shop.

AL

[Bob]

Leaks–can be a bit of a challange.. If you are mechanical inclined and can understand the basic system you can make it better to near really good.. Or you can throw money at it and get the same results.. Lots of hands on experience here. Big Welcome! Bob

[Bill]

go to prevostcar.com web site. stay on left side go down to tech publications.. use the last letter in your serial number and last 4 numbers(unit number) will give you coach specific on prevost built shell. for example mine is w6553. I have the same level low as you do with the exception that some units in 99 had two norgens on the front axle depending on unit number. If you click on highlighted area it will dowload to your computer… the web site will tell you this…. good luck !