| Air ride [message #350136] |
Fri, 15 November 2019 11:37  |
thigh19
Messages: 92
Registered: July 2019
Location: Vancouver Wa
Karma: 1
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I have a question about the air ride on these beast. Have read a few threads on this saying proper psi and different psi's people are using to get the best ride. My confusion is that ,mine, automatically adjusts. Are you isolating the bags and manually adjusting? Do you use separate pumps and gauges for each side? How do you compensate for leak down? Please enlighten me
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| Re: [GMCnet] Air ride [message #350139 is a reply to message #350136] |
Fri, 15 November 2019 12:00  |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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Thom,
If your coach has a operating air ride system then other than making sure that your right height on level ground is correct the coach should set correct the air pressure for load and road conditions. Please realize that there are a lot of coaches that have air systems that are totally manual air set for the air ride. You have the best of all world because you have a working system. All the coaches that we have own have had operating systems, 75 Avion with the dash valves, and the 77 Eleganza II and 78 Buskirk stretch coach had and have ElectroLevel 1 that worked and work great. You should not be worrying about what other people run because each coach is different depending on weight, load and road, yours will be different.
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
> On Nov 15, 2019, at 12:37 PM, Thom High via Gmclist wrote:
>
> I have a question about the air ride on these beast. Have read a few threads on this saying proper psi and different psi's people are using to get the
> best ride. My confusion is that ,mine, automatically adjusts. Are you isolating the bags and manually adjusting? Do you use separate pumps and gauges
> for each side? How do you compensate for leak down? Please enlighten me
>
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| Re: [GMCnet] Air ride [message #350140 is a reply to message #350136] |
Fri, 15 November 2019 12:01 |
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It is not supposed to leak. Best to repair your system.
bdub
On Fri, Nov 15, 2019 at 11:38 AM Thom High via Gmclist wrote:
> Are you isolating the bags and manually adjusting? Do you use separate
> pumps and gauges for each side? How do you compensate for leak down? Please
> enlighten me
>
>
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bdub
bdub.net
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| Re: Air ride [message #350146 is a reply to message #350136] |
Fri, 15 November 2019 13:45 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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thigh19 wrote on Fri, 15 November 2019 12:37I have a question about the air ride on these beast. Have read a few threads on this saying proper psi and different psi's people are using to get the best ride. My confusion is that ,mine, automatically adjusts. Are you isolating the bags and manually adjusting? Do you use separate pumps and gauges for each side? How do you compensate for leak down? Please enlighten me
Thom,
Now that you have gotten the good answers (If it is working, let it work) and you are wondering what to do about the leak down.
The best answer is find and fix the leak. That may take a while and so tracking.
But, in the mean time, stack some dimensional lumber under the bogie casting to she doesn't squat too much.
Put the system fix on your to-do list. It is a great system when it is right.
Mine was good for a very long time after I found a bad fitting. (The plastic ones used by GMC are junk.) Now, the system bleeds down, but she doesn't squat. I'll find that next leak some day.
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 ride [message #350147 is a reply to message #350136] |
Fri, 15 November 2019 16:02 |
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Tom Lins
Messages: 372
Registered: February 2004
Location: St Augustine, FL
Karma: 1
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Senior Member |
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thigh19 wrote on Fri, 15 November 2019 12:37I have a question about the air ride on these beast. Have read a few threads on this saying proper psi and different psi's people are using to get the best ride. My confusion is that ,mine, automatically adjusts. Are you isolating the bags and manually adjusting? Do you use separate pumps and gauges for each side? How do you compensate for leak down? Please enlighten me
I can tell you what the pressure is in my quad bag system to achieve correct ride height only because one of the lines going across the underside broke and I had to air it up to correct height. It took 87 lbs on the right side and 93 on the left. Since it was weighed at the Tallahassee rally I know what it weighs on each tire so those numbers make sense. I have the bags shut off at the moment until the replacement lines get here from jimk. When it was functioning correctly I ignore the pressure in the bags, it is whatever it needs to be to get the job done.
Sometimes a bunch of things fail at the same time. This was number three.
Tom Lins
St Augustine, FL
77 GM Rear Twin, Dry Bath, 455, Aluminum Radiator Quad-Bag Suspension Solar Panel
Manuals on DVD
YOUTUBE Channel: GMC Dealer Training Tapes
http://www.bdub.net/tomlins/
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