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Old 03-13-2003, 07:50 PM   #1
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Post Rear Airbag

I have check and check and there is no sign of a regulator or wiring to the compressor, so mine is manual I guess. With the check valve on the tank you have no way of knowing how much pressure there is. Iam sending a picture of a airbag which I beleive is full.
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Old 03-13-2003, 09:04 PM   #2
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It looks full, and the one on the far side looks like a different bag, taller. Does it lean to one side?

John
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Old 03-13-2003, 09:18 PM   #3
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that bag may have air in it but it is not inflated to the required pressure. the height from top to bottom should be ten inches . it is in a post we did a few months . lol
al
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Old 03-13-2003, 09:24 PM   #4
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I agree with Al. those bags look like 50-60psi.
Here is a picture of one of my bags. I am running them a bit on the high side, due to an aftermarket 80 gal fuel tank.
Installing a compressor and pressure regulator would run you about $250.- (If you do it yourself)
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Old 03-13-2003, 09:28 PM   #5
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possibly some one has modified your motor home . you should have a accumulator tank in the rear of your unit. it is behind the gas tankand it has a valve on the bottom that you can check the pressure and that should be 100 lbs. your compressor should be in the street side rear compartment. if you dont have those items you need to put a gage on the line going to the air bnags and inflate to 80/90 lbs. if it isnt raining tommorow morning i will take a picture of my bags so you can see an inflated bag. and the tank also. lol
al
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Old 03-13-2003, 09:30 PM   #6
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thnx im going out of town and really didnt have much time to get on the road.
al
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Old 03-14-2003, 09:49 AM   #7
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as I understand it you can't check the pressure throught the valve on the bottom of the tank...the inline valve prevents air from flowing back and doing that check. I have a non working compressor and have been manually inflating and visually inspecting. I have to check th bag height though and see if it is actually near 10 inches. I have been looking at the exposed mount under the bag to try and gauge if it looks full.

Here is a quote from Andy inlandRv -
"Classic Airstream Motorhome and the Argosy Motorhome height's are not measured from the bumper. They are measured at the air bag itself.
From Serial number 9622 and back (81 and back), the ride height from the top of the air bag plate to the bottom of the dish, is 8 3/4 inches.
From serial number 9623 and up (1982 & up), the dimension is 10 1/2 inches.
1982 and up Motorhomes had two rear bags, therefore the height control of each bag must be adjusted.
Additionally the front air bags MUST be inflated to 55 PSI.
That is the pressure used when the front end was aligned at time of manufacture.
It is not wise to measure the height at the rear bumper, since the fulcrum is at rear axle or axles. Changing the air pressure in the front axle bags will change the rear bumper dimensions
The dimensions given here are the specs from Airstream.
It is suggested that a person use extreme caution when making these adjustments. Altering the rear air bag dimensions, by raising the height to clear an entrance to a driveway, as an example, should not be done on a permanent basis. A temporary change in pressure should only be done to perhaps clear that driveway, and then return the pressure back to normal. An abnormal increase in the rear bag pressure could alter the handling."
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Old 03-14-2003, 10:30 AM   #8
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Airbag Dimension

The dimension of my original post picture is 6-1/4"+or- 1/16" on both bags. Both Bags look and measure exactly the same. Do these bags come up above the lower dish like in Peters picture, then I need to manually add air pressure to the manual line that is installed to the tank.
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Old 03-14-2003, 05:28 PM   #9
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I looked at 6 other MH at the Mystic Springs Rally and all of them had the bags above the bottom rim by one to two inches.
Take a tape measure to it and you will probably find ~8" from top to bottom rim.
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Old 03-15-2003, 08:03 AM   #10
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I went and added more air to mine, then measured and the bags are at about 6 1/2 " top to bottom.
They seem fully inflated and the ride height looks good / there is no way they would ever fill to the 10" level. At least not without a new big "bang "theory. I will try the measurement from the dish edge to the bag edge and see how it stacks up.
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