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Old 03-11-2017, 01:49 AM   #11
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One benefit to having rear air ride is that you can level the bus side to side by changing the pressures in each sides' air bags. I wish I had rear air ride, an option for my bus, and because I'll eventually have almost 1000 lbs more on the right side I intend to install some air helper springs to level the bus. Just another job to do!

John
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Old 03-11-2017, 07:20 AM   #12
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1000lbs on one side shouldn't make a difference at all. I could have that much with 8 kids (or less) sitting on one side next to windows. Lol

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Old 03-11-2017, 10:06 AM   #13
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pretty sure my 1998 rear air ride International chassis AmTran does not allow individual airbag adjustment.
One valve between the frame and the rear axle determines how much pressure goes into the bags.
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Old 03-11-2017, 12:13 PM   #14
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Quote:
Originally Posted by Iceni John View Post
One benefit to having rear air ride is that you can level the bus side to side by changing the pressures in each sides' air bags.

John
How would someone go about changing the pressure in the bags?

Thanks!

John
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Old 03-11-2017, 12:23 PM   #15
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mild emissions controls started with the 2004 chassis model year.. some 04 busses and all the 05's.. those type emissions were not too worrisome.. the 2007 / 2008 model years started the emission controls with DPF, regen, DEF, etc.. those are the ones that can ruin an engine if they malfunction or are ill-maintained...

Air-seat. i have it in RedByrd, and not in DEV... I get bounced quite a bit in my air seat.. but thats one of the BadAss FUN!! parts of driving a bus.. bouncing in the seat going over bumps, i dig it!
-Christopher
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Old 03-11-2017, 12:32 PM   #16
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If you look at the rear axle you will see a little ... Stick, off the rear axle that connects to the body of the bus. That is your leveling valve. In a commercial sized vehical with air ride the vehical ride height is maintained regardless of the weight because that stick allows more air (psi) in and out of the air bags depending on how much weight is loaded.

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Old 03-11-2017, 01:27 PM   #17
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it would theoretically be possible to use levelling switches to use the air ride to attempt to level a bus when it is parked..

However, you would need a way of keeping air in the system while parked.. if you were moving about inside the bus, the air ride will continue to try and keep the height on a single system as mentioned in the last post..

to use it as a pseudo leveller you would have to separate the bags from each other, currently on most of them there is one valve that puts air into both bags at once assuming in a standard school bus setting the load is usually fairly even side-to-side...

as a camping leveller, lacking front suspension air makes it difficult for a system to truly level your bus, though independent rear bags could surely help....

when you are driving, as mentioned, the system adds air as the rear of the bus sinks, and releases air as it rises above.. most are very very simple valves... a few of the more advanced ones have a delay system in them that only applies or releases air if the suspension changes height for an extended time like 15-30 seconds..

-Christopher
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Old 03-11-2017, 02:19 PM   #18
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Tour buses, High end RV's and the like have a very more complex air suspension system. It also costs alot of $$$, I mean alot of $$$. On one forum a seem to remember a rebuilt Prevost valve body was around $3K. What our buses have is the same as all the tractor trailers and the like. Simple, effective, and low cost.

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Old 03-11-2017, 02:44 PM   #19
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Originally Posted by jctrembly View Post
Tour buses, High end RV's and the like have a very more complex air suspension system. It also costs alot of $$$, I mean alot of $$$. On one forum a seem to remember a rebuilt Prevost valve body was around $3K. What our buses have is the same as all the tractor trailers and the like. Simple, effective, and low cost.

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yeah I replaced the valve for like $60 on my DEV bus.. and i think the air springs are only like $150 a piece or something, and those are easy to change with good jacks and jackstands
-Christopher
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Old 03-11-2017, 02:54 PM   #20
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It looks like this was discussed some at the Wanderlodge forum. http://www.wanderlodgeownersgroup.co...hp?t-3898.html

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