[Ryan]

but want to forewarn you that this is an expensive problem to fix. I had the same problem with the living room slide seal about a year ago. Fortunately (for the location), I happened to be at Parliament Coach in Clearwater, FL. So it was easy to go about the repair. However, that new slide seal and time to remove the old and install the new seal came to about $3500 … ! The biggest chunk of that money was for the cost of the seal at around $2700.00 – Now, about repairing these seals, I have no idea if that is possible. I could ima gine that the seal is like a bicycle tire and if there is hole in the tube, there are kits to repair that. Would this work for the slide seal? No clue.

Cheers,

Ronald

[Thomas]

I had a fireman by the the name of Mike Hoadley telll me that he repaired the busted rubber seal on his parents 07 Counrty Coach and the repair worked well for over 18 months, even after he replaced the rubber seal due to age. I am going to ask the web administrator to post a PDF file called How to repair an air leak in your inflated seal on your Prevost slide out. Thanks for advice and will keep you posted.

[Archived]

Pat there is a manifold that supplies air to the slide seal and mine has a valve on it where the pressurized air enters the manifold on the lower right. The manifold is an aluminum block about 6″x6″ with some solenoid valves on it.

[AL]

Pat,

That is the seal. Keep that picture in mind.

If you expect to repair the seal you first have to expose it. That involves taking the curved aluminum extrusion from the top of the slide room, removing awnings or arms if the coach has them, and then running the slide in past its normal position by about 2 inches.

Once you see the seal you only see the flat surface that makes contact with the slide, but if I were to bet your leak is where the ends of the flattened oval are. That is the part of the seal that flexes the most every time the seal is inflated or deflated. I doubt if there is a long term fix for leaks in the area because if it has cracked it means the entire seal is going to crack in that area, sooner, rather than later.

You have little choice but to buy the seal from Prevost, but as far as getting it installed it is something you can do yourself if you want, or if you don’t prefer to tackle it I would see if you can get quotes from shops convenient to you. Parliament was mentioned and I would not hesitate to take my coach there, East Tenn. Luxury Coach, Tradewinds, Liberty. It is about 8 man hours or less if the shop has done a lot of them. The key is to make sure the shop does have the experience because the slide has to be manually operated to move it in beyond the side of the coach and you want a shop that clearly knows how to prevent the slide pins from firing. One small screw up with the slide pins and it gets very very expensive.

[gary]

When our front seal blew Marathon advised us to shut off air at dial adjustment to seal. We ran Phoenix AZ to Mira Loma, CA. without any problems. The hard slide frame structure never moves so only the pressure seal is affected.

FYI… new spec on seal pressure is 10 psi.

If it rains tilt the bus on drivers side so water cannot enter bus. You’ll need to sit out the storm.

I wouldn’t let a blown slide seal spoil your weekend.

[Archived]

Great advice from all so far, please keep it coming!!! Much appreciated too.

[Bill]

Pat I am in Ann Arbor Mi not far from you give me a call if you need help 1-307-331-5801

[Archived]

Boys and girls I have to say, I can’t believe what a great group of people Jon and Tom have brought together for us bus owners. When there is a problem or just a question there is always so many people willing to offer advise. And some like Peter are even willing to help with the repair. Thanks Peter, again what a great group of people that are always willing to help. This site is the greatest. Thanks again Jon and Tom I love the site. Warning to others it is VERY addictive.

Bill S.

[Archived]

I second Bill’s post. I don’t often comment, but I’m always checking the posts and information provided on PC and it is a must for any Prevost owner. The website address should be attached to the key chains of any Prevost purchase. Over the past several years I visited the site often to guide us on our purchase to make sure we were knowledgable in our search. A couple of years ago we were lucky to deal with great folks at Liberty and the Motorhome Exchange and I have been constantly learning and upgrading our coach since. Any time I have had questions or concerns the feedback from so many sources has been invaluable. Thanks to all!!

[Archived]

Pat,

Prevost has several versions of slide controls but you should have a valve as Al mentions that will shut of the air supply to the slide seal so your accessory air system can maintain air pressure. On my coach it is mounted on the RH bulkhead in the OTR evaporator compartment. It is a red handled 90 degree turn valve. It might be in close proximity to the pressure regulator and gauge.

If in doubt let me know and I can see if a photo of mine will help.

[Pat & Jan]

Thanks Darcy, now that you’re out of the weeks and exposed we’ll watch for your posts.:)

---

2025 Marathon H3 / 4th Prevost
21 Ram 1500 EcoDiesel 4x4

[Dick]

Thanks for GREAT advice everyone. Got the air cut off – it was a black knob located next to the air guage marked 10 psi. So now my aux. compressor cycles as normal.

[Archived]

You mean we actually gave a correct answer on this one???????? WOW!

If that is the case, today might be your day to play the lottery. You were lucky.

[Archived]

How ridiculous is it that an international company like Prevost has a system that cost $2700 to replace when the Motorhome industry has used and still uses a very inexpensive rubber seal that is adequate. UNBELIEVABLE!!!!!

[Archived]

Dan,

While I agree with what you are saying, probably more about the $2700 than the use of an inflatable seal, I cannot criticize the Prevost design.

It does not matter who designs and builds a coach with slides. One thing is for certain and that is the difficulty in perfectly positioning a slide room in a chassis opening To do that both the chassis opening and the slide room have to be built or assembled to a very tight tolerance. That is possible but the tighter the tolearance the greater the cost.

But then add to that the conderable difficulty all will have in centering the slide room in the opening. While a rubber seal of wiper will successfully prevent moisture from entering a coach, an inflatable seal provides absolute assurance it will not enter because it compensates for all of the variations.

I’m not convinced conventional motor homes with wiper seals in lieu of an inflatable seal are as water proof as we might imagine. The reason for my concern about the seal quality is the impact of a bad seal. With the way slides are trimmed, water entry is not going to be immediately visible. It can get past a seal, and then travel donward and possibly work through, under or around the floor. If it contacts fabric, such as a carpet or wall covering it will be absorbed and spread over a wide area. It can find its way into a bay. All of this can be unnoticed for a long time and when it is noticed it may be too late. I can envision rotted wood floors, bulkheads, walls. I can picture the mold and mildew damage that will follow. I am confident a $2700 seal is significantly cheaper than the cost to repair damage from leaks.