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Old 08-25-2011, 03:11 PM   #1
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fkloster's Avatar
Vintage RV Owners Club
Join Date: Jul 2009
Location: Beaverton, OR
Posts: 233
20 year old bags lose pressure over time...:

I park bus. Front bags hold pressure for about 7 days before sitting down... Rear bags go down 50% in 12 hours 80% in 24 hours and after about 36 hours sit down. Driving down the road all bags perfect. I have a full HWH 510 series 4 point kick down Jack set that works flawlessly and 4 point air bags.


a) Should i sweat it?
b) If i replace rear bags or have them diagnosed, then replaced (assuming the bags just have slow 20 year leak) how much $$ am I looking @ figuring parts and labor @ $100 an hour?

Thanks in advance and happy trails!

fkloster = Fritz & Erin (& Lucy the Weim)
1991 Beaver Marquis 40' (1,225 ft. lbs. torque)
2011 JGC Overland Summit Toad / U.S Gear Brake
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Old 08-25-2011, 05:03 PM   #2
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Fleetwood Owners Club
Join Date: Jun 2009
Posts: 3,697
If they work going down the road. I see no problem with them.
I dump the air out of mine when leveling.
Doesn't HWH instructions say the same?

I had to replace one front bag on mine as it got a pin hole leak that you could hear. That one bag was over $200 just for the bag.
Even with the pin hole it worked fine driving down the road. It just made the compressor run more.

99 Discovery 34Q ISB
2014 MKS AWD EcoBoost Toad
Fulltime Since "99"
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Old 08-25-2011, 06:30 PM   #3
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Location: Silver Springs, FL. USA
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It is not unusual for the air system to have leaks, and not necessarily in the bags themselves. The ride height valves and air lines often leak too. Right now, my right rear sags in about 6-8 hours, while the rest stay up overnight. And that's after having all leaks repaired just 4 months ago. I'll have it fixed next time its in the shop for something else.

Your compressor can easily keep up with even a major leak, so it's more of a nuisance than a problem.
Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
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