MC-9 Air Bags

[Bussman84]

OK, I have researched the archived threads on this topic but just can't find enough information to answer my question. So to those of you that have done this before or have been around these buses long enough to know what I need I am asking for your honest advise and opinions. I have a 79' MC-9 that still has the double convoluted air bags on the front and also on the drive axle. They have already been plated, 2 of the front bags have small leaks and are in need of being replaced, and I am trying to decide whether to replace with the same style or to go with the rolling lobe style? Now if I go with the rolling lobe style do I put all 4 on the front? (besides the fact of course if I do go with this style I will replace all 4 at the same time.) but I thought that I read some where that with the rolling lobe style that you run 2 bags instead of 4 or is that maybe only on newer buses? Since mine already has the plates on top can I just replace the bags with either style or will I need a kit for the rolling lobe style? If I go with the rolling lobes can I just do front for now or do I have to do rear at the same time? Does anybody have part numbers for the rolling lobe style? Are they any more common to find than the double convoluted if you would happen to have trouble on the road? I have been trying to find the double convoluted ones here local, because we are needing to run to Kansas City in about a week or so and wanted to get this fixed before then so we don't have issues, but nobody here local has or can even get them for us. Sorry this was kind of long winded but trying to make sure I cover all the bases. Any help and opinions would be greatly appreciated.

Thanks Again, Billy

[Joe Camper]

IMO rolled lobe bags are going to be a softer ride. They always were on trucks. Freightliner used the double convoluted and those trucks I drove with them road like the bags were filled with concrete.

[bottomacher]

First, you need to get a copy of the maintenance manual, and, ideally, the parts book as well. Then call or go online (mcicoach.com) or Luke in NJ to buy the bags and related parts. It's not a hard job on the front. AFAIK, the newer mc9's only can use the two bag setup, but I don't know much.

[Bussman84]

Thanks for the info guys. I have been to the MCI website but they want you to register with them before you can use there site, and want business name info ect. Does any one know if just general public can register or deal with them? Also I haven't had the pleasure of dealing with Luke yet (seen him mentioned here many many times) does he have a website or does any one have contact info for him? Thanks Billy

[thomasinnv]

you do not have to have a business name to register with mci. Might check Mohawk too.

[Lin]

I don't think that Luke (US Coach) has a website, but he will have the parts and information you need.  If you have not dealt with him before, this would be a good time to start.

[RJ]

Billy -

Luke's number is 1-888-262-2434, M-F, 9-5 Eastern - best commit to memory!  Probably forgotten more about these beasts than all the members of this forum combined.  Strong supporter of our little community - support those who support us.  Will ship out the correct parts same day when you use plastic money, reasonably priced (for a HD vehicle).

Your coach was designed to use four air bellows on the front and drive axle, plus one on each tag.  Some newer coaches only use two per axle, and they have a markedly different ride - one transit design in particular has the reputation of causing more workman's comp claims for back injuries by it's operators than any other on the road.  So, if it ain't broke, don't fix it!

You can do one side at a time, many have.  All four at once is best, if you can.  Then you won't have to worry about that axle for a long time.

Be sure to get the bolts, too!

FWIW & HTH. . .