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Old 12-09-2010, 03:11 PM   #1
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front air bags have deflated

Our new rig has been 'put away' for the winter. I parked it about 4 weeks ago. The front air bags have obviously deflated on their own over time. Is that normal or is there a slow leak someplace? We have had a problem getting the front air bags to air up when we retract the levelers (for which it will be going in for service, again, in early spring).
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Old 12-09-2010, 03:23 PM   #2
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Normal. Mine drops after about 3 days. Infact if I'm going to leave it anywhere I dump the air. It's easier to get in and out.
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Old 12-09-2010, 03:34 PM   #3
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I really do not think that is normal. My 2000 newmar can sit and the air ride does not go down. Is your rear also going down? With your front going down and maybe the rear i would think your air compressor is cycling on and off more that it should be when driving due to the leak.
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Old 12-09-2010, 03:35 PM   #4
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My bags are rock solid so far when the MH is stored. I haven't stored it for more that about a month at a time. This winter will probably be the longest it hasn't been driven so as they say "time will tell".
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Old 12-09-2010, 04:02 PM   #5
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I've been corresponding with Spartan on a problem with, I suspect, the leveling valve. I'll ask them for an 'official' opinion on this too and will pass that on here.
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Old 12-09-2010, 04:04 PM   #6
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Most air systems have at least a small leak or two, so yes it is common for them to deflate over a few days. Your compressor can easily keep the pressure up when it runs, so leaks are usually not noticed until you park. Nor are they serious except that a small leak may eventually get larger.
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Old 12-09-2010, 04:19 PM   #7
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Hi JMonroe,
Good luck with Spartan on this question. I had the same problem a few years ago. It seemed Spartan did not want to be bothered. One kind of knows when they are given a "standard answer" just to blow off a customer. After the coach was out of warranty one of the valves was found to be leaking ever so slightly. My $s paid for the repair. I had Newmar factory service make the repair.

However, like others have posted, I dump air whenever the coach will sit still for a while.

I'm not sure it you level with air or jacks. If you use jacks, consider trying this when leaving your site:
1. start engine
2. wait about 10 seconds
3. retract jacks

The coach should get to ride height in the correct amount of time. (Less than the time it takes to do a final walk around.)
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Old 12-09-2010, 06:21 PM   #8
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GaryKD

The procedure I've been following is the one described in the 'book'. I start the engine, then run in the slide outs, then retract the jacks. There's plenty of air pressure, but the front air bags just won't inflate. Looks wierd, the rear jacked up, the front within inches of the ground.

Even when fully inflated, I still think the front end is too low. It's clearly at least a couple inches lower than the rear.
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Old 12-09-2010, 06:25 PM   #9
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Hi JMonroe,
Because the front looks low, even after the bags fill, it sounds like it is time for a ride height check and possible adjustment.
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Old 12-09-2010, 06:29 PM   #10
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I agree. I'm still corresponding with Spartan, to see if they do too.
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Old 12-09-2010, 06:50 PM   #11
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My coach has an auto air dump. When I lower Jacks the air bags auto dump. I have no manual dump control. Check your coach to see if it has an auto dump built in.
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Old 12-10-2010, 11:53 AM   #12
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OK, had a discussion with a Spartan rep. Very nice and seemingly willing to do whatever it takes to help. We have an agreed upon plan that will include replacing the height control valve, checking the entire system for moisture and adjusting the ride height.

I did ask about the air bags deflating over time. He says that is normal. The amount of time it takes to fully deflate is individual to each coach, but typically takes a couple days to a week. Says it does not hurt anything for the coach to sit on a fully deflated suspension. There are 'bumper stops' inside the air bags that protect the system from harm.

Our system is like your's, VagasDan. It 'auto dumps' when I go to extend the leveling jacks and is supposed to air back up when the jacks are retracted. The only manual dump switch I have is for the tag, but it too will auto dump if I put the rig into reverse.

The final chapter on this won't be written before next sping. The coach is isn't leaving our driveway until winter leaves us. Around here, that could be June!
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Old 12-10-2010, 12:10 PM   #13
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The routing of the air hoses to the bags is critical, and it sounds like an air hose may be getting crimped when your levelers are retracted. If they fill easily with the levelers extended, that may be your problem...I'm sure that will be one of the first things they check.
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Old 12-10-2010, 04:50 PM   #14
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we have a different RV, but air bag system.... will stay parked and level for months at a time.... we are Workamping in Utah and it has stayed level for 2 months, until we start and move it!!!
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