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Stuck and not sure what to do
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at one time pre had a part# screw up and listed the same bag for tag as steer. I think my 89 had 12 inch dia on front. Got me currious also. 12R-?? with your height control when your in drive travel the air stack switches to everything being controlled by ride height valves.. if that doesn’t happen it is all controled by the selnoids Glens mentioned. going to ck your unit number out and see if it was ser up differant than the 89.
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The Prevost part number issue was that smaller air bags were supplied than the ones actually required, but as I recall that problem was resolved about 8 to 10 years ago. If in fact Bill had gotten those bags erroneously supplied I think his problem would not have happened.
His date of the installation of the air bag that originally failed falls in line a little with the issue, but instead of a bag failure, it is probable his post would be about his front end not raising to ride height.
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D140131_E.eps Is the latest air dia I can find on that coach. Pre part # 63-0077 = 1R10-108 same as drive and tag ????????? Prevostcar.com tech pub
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Do not accept this as the correct part numbers, but I believe the air bag part number issue was 630259 and 630260 were flipped. Without a lot of research I’m guessing 630260 bags were being installed where 630259 were required.
I cannot remember the original or Mae West air bag numbers.
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That was last revision I could find for that coach # I guess what we all are saying is research it there has to be a solution. Don’t take my suggestions as expert..Just use them to ask questions or food for thought.There was a change between his coach and the one before and after that #
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I dug way back in the airbag archives and this era was discussing air bags for a 1991 XL. Back then Prevost was mistakenly reversing the 259 and 260 bags in the parts department and a bunch of coaches got the wrong bag.
126 – May West
259 – Motorhome
151 – Entertainer
260 – Seated Coach – double flanged
This was a post from Jon.
Lets assume the 259 is indeed a direct replacement for the 126. Assuming their diameter and height dimensions are identical they should lift the front end of the bus easily. Using the 11″ diameter as the effective lifting area the air bags have a 95 square inch lifting surface. The lifting surface area determines how capable an air bag is at raising or supporting the weight placed upon it. In the case of the 259 and 126 this translates into an ability to support 9500 pounds per air bag at 100 PSI. This is theoretical because we do not know the actual lifting area, but is good for analysis.
The entertainer air bag 630151 has a 12 inch diameter. That additional 1″ of diameter does not seem like a lot, but it calculates to 113″ of lifting surface, or one that is capable of supporting 11,300 pounds at 100 PSI.
Stated another way, the 259 requires 73 PSI to support my coaches front end weight and the 151 requires 62 PSI to accomplish the same thing.
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Bill,
Is it possible you got the 12” bag instead of the 11”?
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630170 is the part number of the bags we installed and will have to re-install to get moving again. If that’s not what we need then we will have to figure out what to do to try to mitigate the problem after we are mobile again.
I can’t get under the coach to see if that line is hitting the valve until I can find a mobile service person to replace the bag.
Thanks for all thoughts and research. As I mentioned, we did have the 109 bag and Prevost installed those at an FMCA rally back in the early 2000’s. 5-7 years ago when we ordered replacements they said the 109’s were wrong and shipped the 108’s which have survived for years but we often had issues with the front end dropping during sharp/sloped turns. I can’t recall that happening in the early years.
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I’ll stick my neck out and say you have the wrong bags. Prevost retains all service history and as owner of your coach you can request a print out of the history going back to its first delivery. You may have to send a copy of the title or registration to get that record.
But if service was done elsewhere you will not be able to get that from Prevost.
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