GlennWest Posted April 26, 2018 Report Share Posted April 26, 2018 For overnight stops to advoid unhitching, could a check valve be installed in the air line 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Av8r3400 Posted April 26, 2018 Report Share Posted April 26, 2018 I hooked mine to the unused power-divider valve. Not sure if I'd do it that way again. It deflates when the truck is shut down. Then again, my truck airs down in a couple hours, anyway. Av8r34002012 Volvo VNL 730 D13 iShift & 2021 Grand Design Momentum 397TH I'd rather die trying to live - Than live trying not to die. -Leonard Perry Link to comment Share on other sites More sharing options...
GlennWest Posted April 26, 2018 Author Report Share Posted April 26, 2018 Mine will go down in like a day but it could get worse by end of trip so never safe not to unhook. A check valve should correct this. Wondering if anyone has done this 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Scrap Posted April 26, 2018 Report Share Posted April 26, 2018 It needs to be plumbed into one of the side ports on your dryer. They are pressure protected and close at 70 psi falling pressure. If 70 is too low then go to tank instead and plumb with a pressure protected check. Sealco 140290. http://www.sealcocvp.com/prod/catalog/140200/index.htm Link to comment Share on other sites More sharing options...
Hewhoknowslittle Posted April 26, 2018 Report Share Posted April 26, 2018 I plumbed mine on the Volvo to my sliding hitch valve, then on the leveling valve I added a dump valve to let all the air out if the hitch, this way when unhooking I could let the air out of the truck and hitch bags or for overnight parking I could do the same. Most Walmart lots that we overnighted in had enough of slope we would or could get level. Roger Link to comment Share on other sites More sharing options...
GlennWest Posted April 26, 2018 Author Report Share Posted April 26, 2018 My Freightliner doesn't drop down a lot like the Volvo's do. So of hitch stays up I would be good 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
lockmup68 Posted April 26, 2018 Report Share Posted April 26, 2018 7 hours ago, Hewhoknowslittle said: I plumbed mine on the Volvo to my sliding hitch valve, then on the leveling valve I added a dump valve to let all the air out if the hitch, this way when unhooking I could let the air out of the truck and hitch bags or for overnight parking I could do the same. Most Walmart lots that we overnighted in had enough of slope we would or could get level. Roger Is there a step-by-step anywhere on plumbing in a dump valve? I need to put one on my rig. Would help with loading and unloading the car on different terrain. My TS hitch does not air down by itself. But it also does not have a leveling valve on it. Just in/out switch on dash with gauge. I saw one at the ECR last year and he had a leveling valve and shocks on his TS. 2003 International Eagle 9200i, Cummins ISX, Freedomline 2007 Teton Scottsdale XT4 Link to comment Share on other sites More sharing options...
HERO Maker Posted April 26, 2018 Report Share Posted April 26, 2018 Shannon, is there a valve next to your gauge? If there is, and that is where you air up you hitch, that is also where you will let all air our if it for unhitching. Rocky & Sheri Rhoades '01 Volvo 770 2016 DRV Mobile Suites, HoustonHERO Makers Ministry Link to comment Share on other sites More sharing options...
DesertMiner Posted April 26, 2018 Report Share Posted April 26, 2018 18 hours ago, GlennWest said: Mine will go down in like a day but it could get worse by end of trip so never safe not to unhook. A check valve should correct this. Wondering if anyone has done this Do you know where you are loosing air at the hitch? The bags? The leveling valve? Other? Where would you put the check valve to prevent loosing air? Link to comment Share on other sites More sharing options...
GlennWest Posted April 26, 2018 Author Report Share Posted April 26, 2018 Hitch is fairly new. The truck in a 2006. I had it holding air fairly good but gotten worse. Seems that battle is on going. Where to put valve, just in line. 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Scrap Posted April 27, 2018 Report Share Posted April 27, 2018 14 hours ago, GlennWest said: My Freightliner doesn't drop down a lot like the Volvo's do. So of hitch stays up I would be good Plumb the hitch into the pressure protected accessory port on the dryer like it is supposed to be and the hitch will stay up with the rest of the truck. The reason the truck stays up longer is because you don't have a 3 tank system with wet tank and two check valves like everybody else. You have a two tank system (but still at 12X chamber volume like theirs, per 121) all pressure protected at different levels. The dryer can isolate each part of the system and can pick and choose who gets the air, who gives the air, and who gets cut off. The others get only two tank volumes to hold their truck up overnight and you get the complete truck volume to hold it up. But only if you have it plumbed into an accessory or suspension port. Adding a check valve doesn't give the leveling valve in the hitch any volume to work with. Sure it'll stay up when the truck goes down, but only while you are looking at it. Touch it just once with enough force to make it draw air and it'll sink down. Link to comment Share on other sites More sharing options...
GlennWest Posted April 27, 2018 Author Report Share Posted April 27, 2018 Yes mine is in port on tank on passenger side. 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Scrap Posted April 28, 2018 Report Share Posted April 28, 2018 Yea that is the problem. Get it out of the tank bung and put it in an accessory port in the dryer. Should see an improvement in keeping it up. Link to comment Share on other sites More sharing options...
rpsinc Posted April 28, 2018 Report Share Posted April 28, 2018 What about installing a ball valve on the pressure line going to the hitch. Need it to hold, close the valve. Need to dump it, leave it open. Likely open will be the most common position but when needing to hold pressure in hitch close the valve. Marcel Link to comment Share on other sites More sharing options...
noteven Posted April 29, 2018 Report Share Posted April 29, 2018 Just plumb it like Scrap said. It's what those ports are for. "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
DesertMiner Posted April 29, 2018 Report Share Posted April 29, 2018 So you don’t know where it’s leaking down.... how would you know where to but a “check valve”? Those leveling valves are notorious for having a short usefull life, start checking for leaks there! Link to comment Share on other sites More sharing options...
GlennWest Posted May 1, 2018 Author Report Share Posted May 1, 2018 On 4/28/2018 at 12:20 PM, Scrap said: Yea that is the problem. Get it out of the tank bung and put it in an accessory port in the dryer. Should see an improvement in keeping it up. Didn't have an open port so I teed into an existing line. 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
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