Home » Public Forums » GMCnet » Air bag lines
| Air bag lines [message #224406] |
Thu, 03 October 2013 02:30  |
Silvrlady3
Messages: 9
Registered: August 2004
Karma: 0
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Junior Member |
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Pack rats ate into both air lines right in front under hood on left. My son temporarily connected them with a hard rubber and metal rings. Where can I get new lines.
I needed to raise it up but I do not travel in it.
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| Re: Air bag lines [message #224417 is a reply to message #224406] |
Thu, 03 October 2013 07:19  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| Silvrlady3 wrote on Thu, 03 October 2013 03:30 |
Pack rats ate into both air lines right in front under hood on left. My son temporarily connected them with a hard rubber and metal rings. Where can I get new lines.
I needed to raise it up but I do not travel in it.
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Silvr,
Any place that has truck part will have the 1/4 nylon line in stock. If you buy a length of line and a few unions (nr of lines * 2), you should be patch the lines successfully. DOT spec parts cost more, but are a much better part. If you want lines in matching colors, call JimK.
Without a doubt, the best jury rig for the rear suspension is tow buy a pair of 1/4NPT Snifter valves at a hardware store and put then right into the fitting on the airbags. A "snifter" valve is used in home well systems to put air in the tank, they are just a scrader (tire stem) valve in a pipe fitting.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Air bag lines [message #224423 is a reply to message #224417] |
Thu, 03 October 2013 08:10 |
GMC Cruse
Messages: 606
Registered: June 2009
Location: SE Michigan
Karma: 3
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Senior Member |
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| Matt Colie wrote on Thu, 03 October 2013 08:19 |
| Silvrlady3 wrote on Thu, 03 October 2013 03:30 |
Pack rats ate into both air lines right in front under hood on left. My son temporarily connected them with a hard rubber and metal rings. Where can I get new lines.
I needed to raise it up but I do not travel in it.
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Silvr,
Any place that has truck part will have the 1/4 nylon line in stock. If you buy a length of line and a few unions (nr of lines * 2), you should be patch the lines successfully. DOT spec parts cost more, but are a much better part. If you want lines in matching colors, call JimK.
Without a doubt, the best jury rig for the rear suspension is tow buy a pair of 1/4NPT Snifter valves at a hardware store and put then right into the fitting on the airbags. A "snifter" valve is used in home well systems to put air in the tank, they are just a scrader (tire stem) valve in a pipe fitting.
Matt
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This is what Matt is referring to:
http://www.gmcmhphotos.com/photos/member-galleries/p35021-schrader-valve-ace.html
Mike K.
'75 PB
Southeast Michigan
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| Re: Air bag lines [message #224429 is a reply to message #224423] |
Thu, 03 October 2013 10:36 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Most decent auto parts stores have the lines in bulk (by the foot).
Just buy a few feet and a couple of connectors to repair them. I know that the local NAPA has them at double the price of other local auto parts stores. My local CarQuest store also stocks them.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Air bag lines [message #224440 is a reply to message #224406] |
Thu, 03 October 2013 14:59 |
Francois
Messages: 161
Registered: October 2012
Location: Southern California
Karma: 0
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Senior Member |
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I wish I could find my leaks.
I went ahead and got new Firestone airbags for my Sully system, and replaced all nylon lines, red-right and black left DOT. I have a schrader valve and a check valve connected to each compressor, so it isn't a leak back at the compressors.
I ran lines to the front side panel and have gauges there next to the switches.
I fill up the bags to approximately 40 lbs each, and three days later they are down to under 20. When I first installed this system, it took 5 days for it to go under 20. That was annoying enough, but now three days ...
New compressors, new fittings, new valves and lines, all plumbing tape, no bubbles anywhere with the soapy water test. Sigh!
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| Re: Air bag lines [message #224468 is a reply to message #224440] |
Thu, 03 October 2013 20:08 |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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| Francois wrote on Thu, 03 October 2013 12:59 |
I wish I could find my leaks.
I went ahead and got new Firestone airbags for my Sully system, and replaced all nylon lines, red-right and black left DOT. I have a schrader valve and a check valve connected to each compressor, so it isn't a leak back at the compressors.
I ran lines to the front side panel and have gauges there next to the switches.
I fill up the bags to approximately 40 lbs each, and three days later they are down to under 20. When I first installed this system, it took 5 days for it to go under 20. That was annoying enough, but now three days ...
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Sounds like you did it all right and carefully. I would question the check valves. I know they are supposed to close but I am wondering if they are failing to seal all the way. If the compressor is holding some of the pressure the flow will perhaps be too little to set the valve solidly.
Perhaps you could take the tube off at the compressor, but after the check valve and see if there are bubbles in that line. Listen as you break it loose as it may seal without the compressor "helping".
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: [GMCnet] Air bag lines [message #224473 is a reply to message #224440] |
Thu, 03 October 2013 20:55 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Generally, the shut-off valve and Schrader are installed on or VERY near the airbag inlet. That way, you can fill the bags as needed to get ride height correct and then isolate the bags from possibly leaky lines and junctions.
Mac in OKC
Money Pit
Sent from my iPad
> On Oct 3, 2013, at 14:59, "Sigmund Frankenfelter" <ziggy.frankenf@gmail.com> wrote:
>
>
>
> I wish I could find my leaks.
>
> I went ahead and got new Firestone airbags for my Sully system, and replaced all nylon lines, red-right and black left DOT. I have a schrader valve and a check valve connected to each compressor, so it isn't a leak back at the compressors.
>
> I ran lines to the front side panel and have gauges there next to the switches.
>
> I fill up the bags to approximately 40 lbs each, and three days later they are down to under 20. When I first installed this system, it took 5 days for it to go under 20. That was annoying enough, but now three days ...
>
> New compressors, new fittings, new valves and lines, all plumbing tape, no bubbles anywhere with the soapy water test. Sigh!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Air bag lines [message #224486 is a reply to message #224473] |
Fri, 04 October 2013 00:32 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Agreed with Mac. Schrader valves at the bags then If the rest of it leaks out over time who gives a rip? Set em and shut the valves. Heck, if you have a pair of fives for castor you can just leave em locked out and the only reason you remember you left it that way is cause you've been staring out the windshield so long you actually have time to remember. it will drive fine.
Todd Sullivan
> On Oct 3, 2013, at 6:55 PM, D C _Mac_ Macdonald <k2gkk@hotmail.com> wrote:
>
> Generally, the shut-off valve and Schrader are installed on or VERY near the airbag inlet. That way, you can fill the bags as needed to get ride height correct and then isolate the bags from possibly leaky lines and junctions.
>
> Mac in OKC
> Money Pit
>
>
> Sent from my iPad
>
>> On Oct 3, 2013, at 14:59, "Sigmund Frankenfelter" <ziggy.frankenf@gmail.com> wrote:
>>
>>
>>
>> I wish I could find my leaks.
>>
>> I went ahead and got new Firestone airbags for my Sully system, and replaced all nylon lines, red-right and black left DOT. I have a schrader valve and a check valve connected to each compressor, so it isn't a leak back at the compressors.
>>
>> I ran lines to the front side panel and have gauges there next to the switches.
>>
>> I fill up the bags to approximately 40 lbs each, and three days later they are down to under 20. When I first installed this system, it took 5 days for it to go under 20. That was annoying enough, but now three days ...
>>
>> New compressors, new fittings, new valves and lines, all plumbing tape, no bubbles anywhere with the soapy water test. Sigh!
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Air bag lines [message #224527 is a reply to message #224473] |
Fri, 04 October 2013 13:10 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Which reminds me, on Frank's PB, my old one, thee Schrader valves are upstream of the cutoff valves. For reasons best known to whomeverputy them on. So if there's a leak in the plumbing, it will leak while you fill through the Schrader. Only benefit I can see is, a missing or leaky Schader won't drop the coach after the valve is closed.
--johnny
'76 23' transmode norris
--------------------------------------------
On Fri, 10/4/13, D C _Mac_ Macdonald <k2gkk@hotmail.com> wrote:
Subject: Re: [GMCnet] Air bag lines
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Date: Friday, October 4, 2013, 1:55 AM
Generally, the shut-off valve and
Schrader are installed on or VERY near the airbag
inlet. That way, you can fill the bags as needed to
get ride height correct and then isolate the bags from
possibly leaky lines and junctions.
Mac in OKC
Money Pit
Sent from my iPad
> On Oct 3, 2013, at 14:59, "Sigmund Frankenfelter"
<ziggy.frankenf@gmail.com>
wrote:
>
>
>
> I wish I could find my leaks.
>
> I went ahead and got new Firestone airbags for my Sully
system, and replaced all nylon lines, red-right and black
left DOT. I have a schrader valve and
a check valve connected to each compressor, so it isn't a
leak back at the compressors.
>
> I ran lines to the front side panel and have gauges
there next to the switches.
>
> I fill up the bags to approximately 40 lbs each, and
three days later they are down to under 20. When I first
installed this system, it took 5 days for it to go under 20.
That was annoying enough, but now three days ...
>
> New compressors, new fittings, new valves and lines,
all plumbing tape, no bubbles anywhere with the soapy water
test. Sigh!
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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GMCnet mailing list
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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