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Old 08-27-2016, 05:34 PM   #1
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Do air bags lose air in general??

Have Forester 3011DS with the rear air bags.

I find that after I drive about 250 miles the bags will be down about 10 lbs on a regular basis. Generally try to run about 75 lbs in them but they will be down to 65 or 60 after a while.

Not having had air bags previously is this normal or should I be looking for a leak???
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Old 08-27-2016, 05:44 PM   #2
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You do have a leak.

Fill a spray bottle with a soap/water mix, air it up to normal and then spray as many connections as you can reach.

If you see the air line near the frame spray it incase it has rubbed a hole in the line.

And spray the bags as well.
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Old 08-27-2016, 06:52 PM   #3
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Oregon, they will lose a little over time, but not like you are seeing. Our passenger side bag on our 2017 Sunseeker was leaking from the factory at the connector at the top of the airbag. It would be down to 10 lbs in just a couple of days. Dealer tightened it. Both sides now stay up and didn't require any air after checking after 3 weeks. It could be a DIY, but since mine had to go back for a couple of other warranty items, they took care of this too.
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Old 08-28-2016, 12:04 AM   #4
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I think the airbags lose air from the hose that runs between the airbag and the air fill nozzle. Not the hose itself but the connections. I've no proof but that's my theory.
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Old 08-28-2016, 02:15 PM   #5
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Quote:
Originally Posted by Creativepart View Post
I think the airbags lose air from the hose that runs between the airbag and the air fill nozzle. Not the hose itself but the connections. I've no proof but that's my theory.
That would be an accurate assumption of the most common cause. Occasionally, it could be a faulty needle valve or fill valve cap. Possibly a wear point on the hose or a kinked hose that has sprung a small leak.

We have had air bags on 3 TVs and a MH in a 12 year period. Once we had a needle valve that didn't seat. If the system is working properly, they should not lose pressure.
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Old 08-28-2016, 07:11 PM   #6
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air bags

I have only had my air system one year and have yet to put air in it.
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Old 08-28-2016, 07:44 PM   #7
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Mine "bleed off" a few lbs every couple weeks...I'm playing with the pressures anyway, so I can't tell you how much, but it's not what you are experiencing. Many of our roads in the Buckeye State have taken a beating the last few years and are really rough, so bag pressure is a concern of mine...
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Old 08-28-2016, 07:59 PM   #8
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Our Forester (2014) looses about 2-3 pounds per month. Always need to add air before a trip.
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Old 08-28-2016, 11:34 PM   #9
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Our 2016 3171 loses about 10 pounds a month. Always fill to 70 lbs before leaving for the next trip
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Old 08-29-2016, 10:16 AM   #10
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My air bags lose a couple pounds between trips. My air lift 72000 system usually runs for a couple seconds when I start the rig.
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