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02-21-2014, 06:58 PM
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#1
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Senior Member
Join Date: Jan 2014
Location: North East, Tx.
Posts: 219
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Air leak?
I have '99 DSDP M3858 on Spartan chassis. It appears I have an air leak in the rear bags, or in the unit that supplies air to the rear of the coach. The rear of the unit 'deflates' fairly quickly once the rig is shut off (evenly deflating on both sides). Before I take it to the shop I thought I'd post to the group in case anyone can provide insight that might lead to a self, and hopefully inexpensive, fix. Any feedback is appreciated.
__________________
Roger & Cris
2 Kids/2 dogs and too long until retirement!
1999 Newmar DS 3858 (Spartan with Cummins ISC300)
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02-21-2014, 08:10 PM
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#2
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Senior Member
Join Date: Jan 2012
Location: Benton Harbor, Michigan
Posts: 856
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Lots of possibilities. Could be a bag, ride height valve, dump valve, line, fitting, etc.. No way to know without getting underneath and listening for the leak. If it's leaking down that fast it should be easy to hear. It's normal that both bags would leak down evenly even if only one bag was leaking. There both feed from the same tank so the pressure stays the same in both bags.
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02-21-2014, 08:20 PM
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#3
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Senior Member
Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 3,595
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You can hook an air compressor up to the coach air system to provide pressure to check for leaks. It's hard to find air leaks while the engine is running. Mix up some liquid soap and water in a spray bottle and start looking for bubbles. YOu may find more than one leak. Just start at the bags and follow the air lines.
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KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
2013 Jeep Rubicon JK Unlimited
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02-22-2014, 04:46 AM
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#4
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Moderator Emeritus
Nor'easters Club Workhorse Chassis Owner iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,785
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Welcome to the forum and irv2.
Here is a Brochure and Owners Guide for you.
Down below are three links in my signature that will provide info on your Newmar.
Enjoy the forums and safe travels.
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02-22-2014, 05:48 AM
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#5
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Senior Member
iRV2 No Limits Club
Join Date: Nov 2010
Posts: 1,324
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Spray soapy water, where it bubbles...
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02-22-2014, 07:01 AM
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#6
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Senior Member
Join Date: Jun 2005
Location: Indiana
Posts: 1,194
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Quote:
Originally Posted by Roscott
I have '99 DSDP M3858 on Spartan chassis. It appears I have an air leak in the rear bags, or in the unit that supplies air to the rear of the coach. The rear of the unit 'deflates' fairly quickly once the rig is shut off (evenly deflating on both sides). Before I take it to the shop I thought I'd post to the group in case anyone can provide insight that might lead to a self, and hopefully inexpensive, fix. Any feedback is appreciated.
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I replaced ride height valve on the rear because of air leak. The front bags were going down. I know it does not make sense that the front went down but it did according to Spartan the front bags have higher pressure. The valve was app $80 from Spartan.
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2018 Phaeton 40IH
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02-22-2014, 08:09 AM
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#7
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Senior Member
Join Date: Jan 2014
Location: North East, Tx.
Posts: 219
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Thanks all, for the advice. I can't get to it until next weekend, but will provide an update as soon as I have one.
__________________
Roger & Cris
2 Kids/2 dogs and too long until retirement!
1999 Newmar DS 3858 (Spartan with Cummins ISC300)
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