[Dean]

Hey Mr. Bonz,

I am sure Jeff has several folks that have had a failure that may not follow community…

[Larry]

I had a failure after having the CAC replaced and only got 10 miles from the DD Service center in Greensboro,NC.I also had another failure on I 40 coming east out of Asheville,NC about 5 years ago the boot slit and I limped home,it would make 11 PSI of boost.

[Tim]

Good thought Karl but I will pay for my own hoses.

Get Mr French to pay for our CAC, I bet we could get at least 50 documented failures and another 200 guys that don’t know their’s is leaking.

Later

bv

[Archived]

Steve, I am hoping Jeff replies with some info. He will read this eventually.

Jack, failed why? If it’s the hoses, please post your info.

Bernie, hahahahahahahahahahaha. That AIN’T gonna happen, methinks. Actually, that was the way I wanted to steer the conversation, but the best I can get is that the OEM vendor has stepped up their game and things are much better now than they were a couple years ago. I, of course, told him how little that mattered to me, being 4 years out and having to replace mine again. I did suggest that since they are so much better he approach them about servicing those of us that got their not-so-good products.

[Bryan]

Karl, If your comment about how the CAC manufacturer has stepped up to the plate and is making a better product came from Prevost, step back and consider the source. I was told by the highest Prevost source possible the problems with CRapco mirrors had been cured also, and our own Truk got a new set of mirrors that shook as bad as the originals.

I want some of the stuff Prevost can spread put on my garden to make my tomatoes grow.

As to the argument that unless you can prove by the number of reported failures blue hoses are OK on the hot side that makes no sense whatsoever. Prevost engineers cannot be so dumb as to call for blue hoses on the hot side, yet red hoses on the cold side as they were doing. The turbo air temp is around 500 degrees prior ot entering the CAC. What part of that justifies the use of blue hoses. This is extremely disappointing. I thought Prevost was above making these kinds of decisions.

[Robert A]

Who the hell are we talking to anymore Godfather? Prevost or Volvo?

Bus shells for convertors are probably Volvos highest priced on highway product yet we are the smallest revenue producing product they own. A pimple on their ass. 40 or 50 shells a year.

Later

bv

[Archived]

Karl,The blue hoses that I had fail had splits approximately 2-3 inches long in them.

[Archived]

If a coach has a charge air cooler it is there to reject heat from the compression of air. I monitored my turbo outlet air temp about 2 years ago when this whole issue arose and found the air coming out of my turbo was as hot as 500 degrees.

I don’t know if Prevost or Volvo is responsible for generating the bills of material the call out for the various components, but what started this whole issue was when Prevost Nashville insisted on BA’s coach that he needed 2 blue couplings on the hot side and 3 red ones on the cold side.

The first thing wrong of course was the higher rated couplings or hoses (and 3X more expensive) were being called for where the lower rated (and lower cost) would have been more than adequate. This issue had nothing to do with seated coaches or conversion shells. It related to an EGR engine set up with the CAC alongside the radiator.

But 2 years later it appears nothing has changed and the hot side hoses called for are still the 350 degree rated blue hoses.

Jeff has retained some examples of failed blue hoses. Prevost service people claim there is no issue because they never have to replace them. That is sillly because unless there is a failure in their parking lot how are they going to know someone is sitting on the side of the road and unable to move because they cannot get any boost.

[Dan]

Jack, please post or email me your coach details.

Jeff Rowe, please do the same for any that you know of.

Jon W, if you are able to provide me with pictures it would be a great help. If he can’t, and anyone else can, it’s also good. I can’t imagine Guy being able to argue with a blue hose and a gauge reading (especially if right next to it) that was above the rating of the hose. I think the problem is that he, or someone, WILL have to go back to the engineers who are otherwise busy working on new bus things.

There was a warranty bulletin in 2004 on which they are putting a lot of credit in fixing the problems. If you didn’t have it done and I can’t gather some more facts, this is going nowhere.

[Tommy]

One would think that this problem doesn’t only affect motorhome chassis, but would also effect seated as well as entertainer chassis. How are those industries dealing with the potential issue? Would contacting some of the seated carriers as well as entertainer coach companies and get their input and expereince as they are putting many more miles on their coaches then motorhome owners are.

[Robert]

Not a bad idea Charles, but I don’t think that I have the time to hunt down contacts, try to get them on the phone, then explain the problem so that they understand and arrange followup. You game? 🙂

[Karl]

Kar, was the 2004 bulleting supposed to replace the blue hoses? Thanks

[Per]

I had three plus inch failure this past Labor Day on way to Louisville KY. It was the blue hose off the turbo. Now has a red hose. Plan on having the rest of the hoses switched out during next service.

[Archived]

i have had two hoses fail. Each time they replaced the failed hose with a blue hose. Also have had two charge air coolers replaced. First time I did not know about improved model second time installed the improved model and no problems since.

[Archived]

Bob, your coach info and VIN would be very helpful! Please get it and the failure details to me.

I posted a copy of the warranty bulletin for your general perusal in the “Articles” section. It will be available after Admin review.