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

SoCal

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Posted: 02/12/21 10:36pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

For those of you with air bags on the rear axle and a fifth wheel, how much pressure do you use?

I started with 30 PSI and now increased to 38 PSI. About 2,750# of pin weight.

Crespro


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

JIMNLIN

Oklahoma

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Posted: 02/13/21 05:54am Link  |  Quote  |  Print  |  Notify Moderator

With only 2750 lbs of pin weight I wouldn't think the truck would need air bags unless your carrying more "stuff" in the trucks bed over the rear axle or have a badly designed suspension lift kit.
I used bags on my trucks when I was on the roads but just to level the truck and make it less of a DOT target going through a scale house.
I seldom ran much over 25 psi in the rears on one ton DRW trucks/heavy GN trailers.


"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers

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fj12ryder

Platte City, MO

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Posted: 02/13/21 07:10am Link  |  Quote  |  Print  |  Notify Moderator

Around 50-55 psi gets the rear off the overloads on mine.


Howard and Peggy

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Pennsylvania

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Posted: 02/13/21 07:37am Link  |  Quote  |  Print  |  Notify Moderator

I'm right at 40..


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TXiceman

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Posted: 02/13/21 07:48am Link  |  Quote  |  Print  |  Notify Moderator

No two trucks and trailers are the same. You have to adjust the air pressure to what is right for your rig. Generally you want to run the pressure up to the point that you are just lifted off the overload springs and the ride is comfortable.

Remember that you have a 3/4 ton truck and they are limited on cargo carrying or payload capacity. The air springs do not increase the trucks capacity to carry a load.

Ken


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LadyRVer

Florida

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Posted: 02/13/21 08:31am Link  |  Quote  |  Print  |  Notify Moderator

40-50 when I had the fifth-wheel loaded.

garyp4951

TN

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Posted: 02/13/21 08:54am Link  |  Quote  |  Print  |  Notify Moderator

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

momentum rv

Central Cal.

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Posted: 02/13/21 09:03am Link  |  Quote  |  Print  |  Notify Moderator

Load up everything and then air up the bags until the truck is back to level.


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Super_Dave

Harrisville, UT

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Posted: 02/13/21 09:08am Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

Around 50-55 psi gets the rear off the overloads on mine.

I want mine on the overloads for stability and I pressure for level and nothing else, about 10 - 15 psi when unloaded works best for me. I haven't measured what it is when loaded.


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MFL

Midwest

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Posted: 02/13/21 09:30am Link  |  Quote  |  Print  |  Notify Moderator

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


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