Good Sam Club Open Roads Forum: Fifth-Wheels: Air Bag Pressure
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MFL

Midwest

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Posted: 02/14/21 07:32am Link  |  Quote  |  Print  |  Notify Moderator

MANY take the time to understand what the stickers mean. Some stickers involve a class, or registration number limit. Others can be a limit that involves the weakest link (as delivered from factory). If the weakest link is the available spring pack, this can be improved on, by using air bags, or other means. Of course the stickers do not self adjust, when you add more capability. You still need to keep the next weakest link in mind too. Tires/wheels may be next, so that may be the limiting rating.

Jerry





garyp4951

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Posted: 02/14/21 08:29am Link  |  Quote  |  Print  |  Notify Moderator

JRscooby wrote:

TXiceman wrote:

garyp4951 wrote:

I run 20psi just to help the coil springs on the dips at bridges.

TXiceman, my air bags say I can carry 5,000 lbs more. LOL



The air springs DO NOT increase the load capacity of the truck.
All you can say is the air springs an carry 5000#.
The truck is rated for what is stamped on the stickers inside the door jamb.

Ken


But all that means is if the manufacturer can prove you went over their rating they don't pay warranty claims. The only rating the law will enforce is the tires.


Ken, do you know what LOL means?
I was not serious, just kidding, laughing out loud.[emoticon]

TXiceman

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Posted: 02/14/21 09:44am Link  |  Quote  |  Print  |  Notify Moderator

I am a retired mechanical engineer and I go with numbers and ratings. Equipment is designed and rated to be safe by engineers, not backyard mechanics. Believe what you wish and the best of luck on the air springs and over loaded trucks.

Ken


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2013 HitchHiker 38RLRSB Champagne, toted with a 2012, F350, 6.7L PSD, Crewcab, dually. 3.73 axle, Full Time RVer.
Travel with a standard schnauzer and a Timneh African Gray parrot

Cummins12V98

on the road

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Posted: 02/14/21 11:07am Link  |  Quote  |  Print  |  Notify Moderator

FlatBroke wrote:

I leave mine at the minimal when riding around empty, when I hook up it goes to 30, I just leave it there. Haven’t touched the buttons in years.


That is what I did with the 11 DRW. Empty 5psi and it would go to 30 when loaded. Wife would make basic adjustments from inside the cab.

First pic no air bags, second bagged at 30psi. Basically same ride height with 4,500# pin. Same roads with bags and Bilstein's made an amazing ride quality difference.

[image]
[image]


2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
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"HeavyWeight" B&W RVK3600

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Super_Dave

Harrisville, UT

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Posted: 02/14/21 02:29pm Link  |  Quote  |  Print  |  Notify Moderator

TXiceman wrote:

I am a retired mechanical engineer and I go with numbers and ratings. Equipment is designed and rated to be safe by engineers, not backyard mechanics. Believe what you wish and the best of luck on the air springs and over loaded trucks.

Ken

Ken, just curious, what's your response to severe truck squat well before your numbers and sticker ratings are reached?


Truck: 2006 Dodge 3500 Dually
Rig: 2018 Big Country 3155 RLK
Boat: 21' North River Seahawk


Crespro

SoCal

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Posted: 02/14/21 06:12pm Link  |  Quote  |  Print  |  Notify Moderator

Hello,

Appreciate all the answers. I have about 300# to 400# RAWR reserve, so this is just a matter of the best ride. With the bags at 5 PSI, the ride is poor. 30 PSI is better and I now seem to like 38 PSI. The truck is fairly level at 38 PSI.

I think the best level is from 30 to 45 PSI for the air bags and the best ride. One of the YouTube popular shows for Rv's uses 45 PSI on an F-350 with a toy hauler.

Best,

Crespro


Crespro 2021 Grand Design 310GK-R, 2020 F250LB, 7.3L, 4.30, Reese 27K

capacitor

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Posted: 02/14/21 06:28pm Link  |  Quote  |  Print  |  Notify Moderator

I added air bags to a 2500HD when I got a lance camper. The specs say it was 2500 pounds so I would put 50 psi in them. I seem to remember the spec sheet said 1 psi for every 50 pounds. Now I have a small TT and I use 20 to keep it level. I quit using the load leveler bars as they are a pain. No problems so far and it has worked for 10 years.

TXiceman

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Posted: 02/14/21 08:14pm Link  |  Quote  |  Print  |  Notify Moderator

Super_Dave wrote:

TXiceman wrote:

I am a retired mechanical engineer and I go with numbers and ratings. Equipment is designed and rated to be safe by engineers, not backyard mechanics. Believe what you wish and the best of luck on the air springs and over loaded trucks.

Ken

Ken, just curious, what's your response to severe truck squat well before your numbers and sticker ratings are reached?


First thing is to make sure of the weight and you are not overloaded.

I run air springs on my DRW to help the ride. My pin weight and fuel load put me close on the trucks capacity, but I am under. I run 35 to 40 psig which is enough to lift the truck enough to get it off the overload springs and get a less harsh ride. Without the air strings, it rides rough under load.

So if it is to improve load, fine, but don't count on them to handle overloads.

Ken

Big1

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Posted: 02/14/21 10:17pm Link  |  Quote  |  Print  |  Notify Moderator

My pin weight is about 2900lbs I put about 30lbs and that seem to work find, don't need them but I had them from my other truck so instead of letting them sitting around I use them, well not my air bag but my controller by airlift.


2018 Dodge Ram 3500 6.7L CTD
2019 Jayco Eagle 321RSTS

Michelle.S

Western NY till fall, then Sebring, FL

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Posted: 02/15/21 07:43am Link  |  Quote  |  Print  |  Notify Moderator

My Dually rides much better when loaded than empty and I'm on OEM suspension with no add-ons now pulling 19.5K.


2018 Chevy 3500HD High Country Crew Cab DRW, D/A, 2016 Redwood 39MB, Dual AC, Fireplace, Sleep #Bed, Auto Sat Dish, Stack Washer/Dryer, Auto Level Sys, Disk Brakes, Onan Gen, 17.5" "H" tires, MORryde Pin & IS, Comfort Ride, Dual Awnings, Full Body Paint

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