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Old 04-06-2008, 01:46 PM   #1
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1989 34.5' Airstream 345
waynesboro , Virginia
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89 354LE air bag replacement

While coming home from our trip this weekend , i guess my drivers side rear air bag decided to give up on me, its leaking around the bottom. Moho can still mantain enough air to drive but makes compressor run non stop and i think its stealing some air from my front bags. I beleive firestone makes replacements correct?? Do i simply need buy the ones for the p30?? The local rv shops book listed the years as 93-02. Anyone out there know the part #'s.... i found some which i believe would work from ppl's website. I was wondering how hard is this to do?? The front ones look like they can simply slide out the bottom maybe?? I might as well replace them all while im at it. I thought there was a post on this but did a search and couldnt find it. Thanks.
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Old 04-07-2008, 01:40 AM   #2
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We had our front tires replaced in Cottonwood, AZ, at the Big O tire store, and a mobile mechanic who was there said he could replace the front airbags(shot) with a $140 kit, and about 4 hours labor($75/hr)...don't know about the back ones...they seemed to be in ok shape...offered FWIW...?
mike
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Old 04-07-2008, 07:59 AM   #3
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Air bags

There are several posts concerning airbags and replacement there of. It is not all that hard to do? I used a saws-all to remove the old ones from the coil spring and then you kinda roll the new ones up like a sausage and tie them with string so they don't unroll until they are in place. Yes, they go in from the bottom.

I used Airlift J-03-08-A1. Check Air Lift Company. They come with good instructions. Inflate the front ones to 55psi and the rear ones to level depending on your load.
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Old 04-07-2008, 10:11 PM   #4
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maybe i am looking at the wrong thing but whatever i look up seems to be the whole kit... meaning new bags brackets hoses ... the whole nine yards. Can you simply not just replace the air bags?? They are the firestone ride rite air springs which are coming up, however they seem to listed more as helper air springs not the main ones, and look different, but maybe the 2 bubble style is the new thing, not sure....
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Old 04-08-2008, 06:36 AM   #5
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If you go to the web site for Air Lift, you can order individual parts. If you go to an auto parts store, they can order individual Firestone parts. These bags are very common and used frequently on the P-30 chassis.
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Old 04-08-2008, 12:05 PM   #6
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The compressor goes to the rear bags only. The fronts are not tied in with them. You inflate the fronts individually to 55 psi.
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Old 04-08-2008, 05:30 PM   #7
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Yeah after reading all the posts then doing some searching on the bags i realized they are separate, and mustve just decided to go out at the same time, or the rears suffering effected them...
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Old 04-12-2008, 11:29 AM   #8
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Firestone kit for rear is different from factory setup

The Firestone kit for the rear is not the same as the factory setup. It wil not replace the factory bags, but instead mounts betweem the axle and the frame.

I have a new Firestone rear set that I did not install if you decide you want to go that way that I would sell you at a better than retail price.

For the fronts, I chose to install the Henderson springs that are uprated so that you never have to mess with front bags again. 4 hours labor is high for the airbags install only. I would think a couple of hours to r/r the front springs was fair, but I don't have to do it for a living. I did it myself, and could probably do it again in 2 hours.

Paul
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Old 04-12-2008, 03:06 PM   #9
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Mr Paul,
With my mechanical ability, 4 hours would probably begin to undo the damage I could do trying to be something I'm not...the thought of crawling under 16,000+ pounds of unforgiving weight to blindly go where I shouldn't have before is enough to make me pull out the ol' checkbook...
You would want to see me after a wreck or coronary, but if you see my feet sticking out from under a vehicle, you'd better hope I'm napping...
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Old 04-13-2008, 11:10 AM   #10
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so im assuming maybe you ended replacing the stock bags somehow pwhittle?? I need to crawl under there and try and find some numbers... if you went with the firestone bag route do you simply do away with the airbag set up now??? The stock way seems to be more heavy duty, as they are a true air bag setup, like tractor trailers run. I am gonna order the front ones this week and try and do it myself... usually i can get things done, maybe not as quick as an rv shop but it still gets done. If i replace the front ones by this weekend, i can still run my rears right at the beginning of the green on my gauge..... would it hurt the moho to drive it about 40 miles like this??
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Old 04-14-2008, 10:39 AM   #11
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I had won an autocross (not in the Airstream, but in this Paul and Jeremy's Super Stalker) and received a $500 voucher from Air-Lift. Part of it I used to get the Firestone kit thinking I could just replace the bags and never have to worry about them. Once I got the kit, I saw it was not the same, so I shelved the kit and looked around a bit further and found a leaking fitting between the tank and the leveling valve which I replaced along with the pump. It has been fine since.

I assume that the original rear bags are available from a truck supplier, but not from Firestone. Note that mine does not have a tag axle, so my experience is a little difference from yours too.

Not sure on the merits of running it on low pressure.

Paul
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Old 04-14-2008, 02:51 PM   #12
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Sometime between 1983 and 1984 Airstream changed the rear air suspension system. Our 1984 310 uses the newer style bags. Search the forums for information on the bag arrangements. I found a lot of good information on swapping them out. The air bags Paul used on his 1982 are definitely different than the ones used on your 1989.

Surprisingly they weren't all that hard to change. The biggest thing to worry about is to make sure you have the motorhome blocked up properly so when you remove the air lines the motorhome doesn't "fall" on you and also to make sure you have room to slide the bags out. Two bolts on top and one bolt on the bottom for each bag plus an air fitting going into each bag.

Took me something like 4 hours to do the job including blocking the motorhome up properly.

Brad
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Old 04-14-2008, 02:53 PM   #13
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Quote:
Originally Posted by pwhittle
I had won an autocross (not in the Airstream, but in this Paul and Jeremy's Super Stalker) and received a $500 voucher from Air-Lift. Part of it I used to get the Firestone kit thinking I could just replace the bags and never have to worry about them. Once I got the kit, I saw it was not the same, so I shelved the kit and looked around a bit further and found a leaking fitting between the tank and the leveling valve which I replaced along with the pump. It has been fine since.

I assume that the original rear bags are available from a truck supplier, but not from Firestone. Note that mine does not have a tag axle, so my experience is a little difference from yours too.

Not sure on the merits of running it on low pressure.

Paul
Paul, its sounds the kit you have is for providing "air assist" to the rear leaf springs. We installed a kit like that on our 1st Coachmen motorhome. Worked like a charm. Our 1974 Argosy 20' motorhome would likely be able to use the kit you have. If you're still looking to sell it PM me so we can discuss them.

Thanks,

Brad
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Old 04-14-2008, 03:07 PM   #14
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Quote:
Originally Posted by pwhittle
For the fronts, I chose to install the Henderson springs that are uprated so that you never have to mess with front bags again.

Paul
Tell us more...
This sounds like the best idea.
Part #'s ?
Price?
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