| [GMCnet] What bag pressure at max height [message #279356] |
Mon, 08 June 2015 11:13  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Senior Member |
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Hi John,
I use the wireless air controller in both our coaches. That manifold is factory set to max of 100 psi and cannot be changed. That was not enough to attain max height with the stock one air bag system so I added air bag risers to both coaches. Without the air bag risers it took over 90 psi to achieve proper ride height on the Royale with four 6vdc golf cat batteries in the rear compartment where the propane tank is in the GMC models. On the Royale, the propane tank is under the dinette so that rear compartment is open. It took a bit less pressure to get the Clasco up to proper ride height as it has only one 4d AGM battery beside the generator so less extended weight. With the air bag risers in place the Royale reaches proper ride height at 75 psi and the Clasco 65-70. In both cases there is 25 or more PSI to raise for leveling and that seems to max out the rear shock limits. Each combination of rear air bag configuration and effective working height of the bag relative
to the pivot point on the bogie arm will take a different amount of air pressure to raise the coach to the shock limits so no one answer will fit all circumstances.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
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Message: 12
Date: Mon, 08 Jun 2015 08:25:15 -0600
From: John Heslinga
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] What Is Bag Pressure at max height.
Message-ID:
Content-Type: text/plain; charset="utf-8"
Hi All. I know that some of you have air pressure gauges conected to each air bag on your coach. I know it will be dependent on coach gross weight,
but what pressure are you noting as being needed to raise the coach to the shock limits. (Max height During camping).
--
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] What bag pressure at max height [message #279682 is a reply to message #279356] |
Thu, 11 June 2015 21:46  |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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Thanks Jerry !
So I understand that you saying that 90 to 100 psi(Plus or Minus bepending on other loads) will lift you to limits and that is with bag extenders Right? It also sounds like your Weight distribution is a little different than most. I find it intersting that the remote air system has a manifold max pressure of 100psi. I have one question re the extenders. Now that the bag is further out on the Levers of the suspension arm, They have a better mechanical advantage,(Hense lower pressures needed to achieve lift). But we know that for one advantage we lose something. In this case, increased distances that the bag has to deform over that OEM range of movement. Is this causing any problems with used bags??
Best Regards
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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