| The auto lever [message #170054] |
Thu, 17 May 2012 21:48  |
rbvere
Messages: 1
Registered: May 2012
Location: Grand Forks BC
Karma: 0
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Junior Member |
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Hi all... I'm new.. and learning all about my GMC. I just bought the GMC this Feb.. and have only just now had a chance to use it .. And do I have questions !
The first one that came up was to do with the air leveling. The coach I have has the newer 4 bag system.. And a air pressure gauge is installed between the wheels , behind the T skirt. hard to read. is there a way to have the two gauges up front ? When I used the "auto" function it seemed to bring to lower side up .. by how can I be sure I have the proper air for travel ?
Rob
1976 Transmode... highly modified..
Rob Vere
Grand Forks BC
www.robsclassicgmc.blog.com
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| Re: The auto lever [message #170058 is a reply to message #170054] |
Thu, 17 May 2012 22:23  |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Senior Member |
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Even with the quadrabag system, the leveling valve in back is what should set the traveling height by letting air out or filling the bags with air as needed. It's an adjustable, mechanical system, and the gauge should be there to only let you know what pressures you are running, but not involved in the auto leveling function.
The actual height measurements should be available by using the search function, but the front height is set by adjusting the torsion bars, unlike the rear. I don't have the measurements written down, but they are quite important to get a good ride without a lot of steering input.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: The auto lever [message #170060 is a reply to message #170054] |
Thu, 17 May 2012 22:59 |
glacierfl
Messages: 444
Registered: June 2011
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Hello,
you mentioned gauges up front. I have been considering digital gauges, that are fed fron tubing tapped off the line that goes into each air bag. I think you can get 150 PSI gauges, of course these would need the appropriate sensor also. This should tell you the pressure that each air bag has on it. Assuming a leak somewhere in the system this gives you the ability to read each bag individually. The gauges could fit into the drivers side panel. The cost for this would be around $250, so it is a little expensive. Well thats an idea, i have been messing around with.
cheers and beers
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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| Re: [GMCnet] The auto lever [message #170099 is a reply to message #170060] |
Fri, 18 May 2012 09:53 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Steve,
The pressure in the bag is directly proportional to the weight on that side of the coach; the heavier the side the more pressure.
Therefore if you’re thinking of comparing the pressures to determine if one side is leaking it ain't gonna work!
Regards,
Rob M.
-----Original Message-----
From: steve & debbie
Hello,
you mentioned gauges up front. I have been considering digital gauges, that are fed fron tubing tapped off the line that goes into
each air bag. I think you can get 150 PSI gauges, of course these would need the appropriate sensor also. This should tell you the
pressure that each air bag has on it. Assuming a leak somewhere in the system this gives you the ability to read each bag
individually. The gauges could fit into the drivers side panel. The cost for this would be around $250, so it is a little expensive.
Well thats an idea, i have been messing around with.
cheers and beers
--
Steve
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] The auto lever [message #170170 is a reply to message #170099] |
Sat, 19 May 2012 08:21 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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does with the wifi manifold..
and allows you to bump them ten lb at a time
gene
n Fri, May 18, 2012 at 7:53 AM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Steve,
>
> The pressure in the bag is directly proportional to the weight on that
> side of the coach; the heavier the side the more pressure.
>
> Therefore if you’re thinking of comparing the pressures to determine if
> one side is leaking it ain't gonna work!
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: steve & debbie
>
> Hello,
> you mentioned gauges up front. I have been considering digital gauges,
> that are fed fron tubing tapped off the line that goes into
> each air bag. I think you can get 150 PSI gauges, of course these would
> need the appropriate sensor also. This should tell you the
> pressure that each air bag has on it. Assuming a leak somewhere in the
> system this gives you the ability to read each bag
> individually. The gauges could fit into the drivers side panel. The cost
> for this would be around $250, so it is a little expensive.
> Well thats an idea, i have been messing around with.
>
> cheers and beers
> --
> Steve
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] The auto lever [message #170282 is a reply to message #170277] |
Sun, 20 May 2012 10:05 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Gary,
Thanks for the info.
The manifold is designed to run the pressure in the bags to a set pressure. If there are no leaks it shuts the valves
That means that there is "something" in the manifold that "knows" that air is being added to the bags and if it continues over a
"certain" period of time the manifold will know that there's a leak.
Regards,
Rob M.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Gary Bovee
Sent: Monday, 21 May 2012 12:50 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] The auto lever
Rob,
Sorry I didn't respond to this question sooner, but I have been out of the
country.
The maker of the manifold would not tell me what is in the manifold that
determines leaks. They advertise their product stating "Exclusive two way
communication provides advanced air system diagnostics such as leak
detection and compressor communication failure. The system adjusts and
automatically maintains set pressures". I can tell you first hand that I
have experienced getting a "leak" reading on the wireless remote when
experimenting with my wireless systems on my test bench. The manifold was
smart enough to detect a slow leak caused by repeadedly using the same old
air line over without cutting a 1/2"off the end of the line before shoving
it back into the manifold connections. I had run tests on several of my
wireless air systems when this happened. That is why the manufacturer
recommends cutting a 1/2" off the end of the air line each time it is
removed from the manifold before reinstalling it again.
It is a nice feature that that you get a warning reading on the remote
should a leak in the wireless air system ever occur. The nice part with the
wireless air system should a leak ever occur, there are way fewer places to
have to check for a leak and therefore much easier to diagnose and repair
than with the original GMC air systems.
Gary
-----Original Message-----
From: Rob Mueller
Sent: Saturday, May 19, 2012 7:54 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] The auto lever
Gene,
I'm sorry but I don't understand how the wifi manifold can determine leaks.
-----Original Message-----
From: gene Fisher
does with the wifi manifold..
and allows you to bump them ten lb at a time
gene
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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