Brad & Jacolyn Posted July 25 Report Share Posted July 25 Good Morning, I have a couple of air leaks that I don't seem to be able to stop. I have replaced the O rings and cut the end of the lines square with a tubing cutter. Now this may be a dumb question but since I'm not sure I'll ask it. Would it help the seal if I apply a little dielectric grease to the connection OR would that makes things worse. Inquiring minds would like to know before I do something that will make the leak worse. Thank you Quote Brad and Jacolyn Tucker the Wonder dog and Brynn the Norfolk Terrier 2009 Smart "Joy" 2004 VNL630 "Vonda the Volvo" 2008 Hitch Hiker 35 CK Champagne Edition VED12 465 HP, Freedomline, 3.73 ratio, WB 218" Fulltiming and loving it. Link to comment Share on other sites More sharing options...
spindrift Posted July 25 Report Share Posted July 25 No grease needed. Have you performed a bubble test to insure you've identified the source of the leak? Quote 2012 F350 KR CC DRW w/ some stuff 2019 Arctic Fox 32-5MCindy and Tom, Kasey and Maggie (our Newfie and Berner) Oh...I forgot the five kids. Link to comment Share on other sites More sharing options...
rickeieio Posted July 25 Report Share Posted July 25 New o-rings would be better than grease. And if you trim the lines, make a nice clean cut so that the o-ring sits on a fresh area of the line. Making the cut perfectly square isn't important, so long as it's close. Parker says within 15 degrees is okay. Quote KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio@yahoo.com Link to comment Share on other sites More sharing options...
mike5511 Posted July 25 Report Share Posted July 25 After almost 5 years of ownership, I have yet to have all the air leaks stopped! The big ones yes, but both my air gauges leak and you can't replace the o-ring that I can figure out. At $275 a piece, mine will continue to leak a little. Chasing air leaks is a never ending chore it seems. Quote Link to comment Share on other sites More sharing options...
HERO Maker Posted July 25 Report Share Posted July 25 4 hours ago, mike5511 said: After almost 5 years of ownership, I have yet to have all the air leaks stopped! The big ones yes, but both my air gauges leak and you can't replace the o-ring that I can figure out. At $275 a piece, mine will continue to leak a little. Chasing air leaks is a never ending chore it seems. Oh so true!!!!!! Quote Rocky & Sheri Rhoades '01 Volvo 770 2016 DRV Mobile Suites, HoustonHERO Makers Ministry Link to comment Share on other sites More sharing options...
jenandjon Posted July 25 Report Share Posted July 25 You will drive yourself crazy trying to stop them all. Quote Farmer, Trucker, Equipment operator, Mechanic Quando omni flunkus moritati-When all else fails, play dead I'm a man, but I can change, if I have to, I guess. Link to comment Share on other sites More sharing options...
palmeris Posted July 26 Report Share Posted July 26 I know this may be subjective to the individual, but what is generally considered an acceptable amount of air leak down? Like X psi in Y time period? Quote Link to comment Share on other sites More sharing options...
Brad & Jacolyn Posted July 26 Author Report Share Posted July 26 (edited) I have the leaks down to just a couple and I generally just live with them. The reason I was asking is that I have one on the Trailer Saver and the air bags keep leaking down while traveling. The leak I found is at the governor. I stopped the leaks at the hitch and tracked the line up to the gauge in the dash but I really don't want to open the dash tracking a single leak. Was hoping you guys had an easy fix. Edited July 26 by Brad & Jacolyn Quote Brad and Jacolyn Tucker the Wonder dog and Brynn the Norfolk Terrier 2009 Smart "Joy" 2004 VNL630 "Vonda the Volvo" 2008 Hitch Hiker 35 CK Champagne Edition VED12 465 HP, Freedomline, 3.73 ratio, WB 218" Fulltiming and loving it. Link to comment Share on other sites More sharing options...
spindrift Posted July 26 Report Share Posted July 26 3 hours ago, palmeris said: I know this may be subjective to the individual, but what is generally considered an acceptable amount of air leak down? Like X psi in Y time period? The following is a copy and paste from commercial DOT testing procedures. Your results may vary... With a fully-charged air system (typically 125 psi), turn off the engine, release the parking brake, and time the air pressure drop. The loss rate should be less than 2 psi in 1 minute for single vehicles and less than 3 psi in 1 minute for combination vehicles. Then apply 90 psi or more with the brake pedal. After the initial pressure drop, if the air pressure falls more than 3 psi in 1 minute for single vehicles and more than 4 psi for combination vehicles, the air loss rate is too much. Check for air leaks, and repair before driving the vehicle. Otherwise, you could lose your brakes while driving. Quote 2012 F350 KR CC DRW w/ some stuff 2019 Arctic Fox 32-5MCindy and Tom, Kasey and Maggie (our Newfie and Berner) Oh...I forgot the five kids. Link to comment Share on other sites More sharing options...
mike5511 Posted July 27 Report Share Posted July 27 12 hours ago, spindrift said: The following is a copy and paste from commercial DOT testing procedures. Your results may vary... With a fully-charged air system (typically 125 psi), turn off the engine, release the parking brake, and time the air pressure drop. The loss rate should be less than 2 psi in 1 minute for single vehicles and less than 3 psi in 1 minute for combination vehicles. Then apply 90 psi or more with the brake pedal. After the initial pressure drop, if the air pressure falls more than 3 psi in 1 minute for single vehicles and more than 4 psi for combination vehicles, the air loss rate is too much. Check for air leaks, and repair before driving the vehicle. Otherwise, you could lose your brakes while driving. My gauges aren't detailed enough to detect 1 or 2 pound increments. Who they kidding!? Quote Link to comment Share on other sites More sharing options...
rickeieio Posted July 27 Report Share Posted July 27 Just take a beer with you and sit for 10 minutes.😁 All joking aside, 2#/min seems like a pretty big leak. I would think it would be easy to find. Quote KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio@yahoo.com Link to comment Share on other sites More sharing options...
palmeris Posted July 29 Report Share Posted July 29 So shutdown with full tanks with less than 60 psi loss 8 hours later sounds like an acceptable loss rate? Quote Link to comment Share on other sites More sharing options...
Nigel Posted July 29 Report Share Posted July 29 More than adequate. I’m happy if the suspension stays up while I’m sleeping not that I’ve slept in the trailer without disconnecting more than a couple of times. Anymore than that is just bragging rights around the campfire. Nigel Quote 2006 Volvo VNL 430, 2006 smart cabrio cdi, 2000 Triple E Topaz 30' Link to comment Share on other sites More sharing options...
rickeieio Posted July 29 Report Share Posted July 29 15 hours ago, Nigel said: Anymore than that is just bragging rights around the campfire. Bingo!!!!! Of the 6 air system trucks we've owned, none have held air for more than a day or two. All were bought used, a couple VERY used, but all met the leakdown requirements. Quote KW T-680, POPEMOBILE Newmar X-Aire, VATICAN Lots of old motorcycles, Moto Guzzi Griso and Spyder F3 currently in the front row Young enough to play in the dirt as a retired farmer. contact me at rickeieio@yahoo.com Link to comment Share on other sites More sharing options...
palmeris Posted July 30 Report Share Posted July 30 On 7/28/2024 at 8:41 PM, Nigel said: More than adequate. I’m happy if the suspension stays up while I’m sleeping not that I’ve slept in the trailer without disconnecting more than a couple of times. Anymore than that is just bragging rights around the campfire. Nigel LOL 😁 Quote Link to comment Share on other sites More sharing options...
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