Air Lift Suspension Surprise

Anxiously awaiting spring or at the very least, above freezing temperatures, I was out in the Cruiser getting acquainted (we've only had it a few weeks). Under the drivers seat I discovered the unit in the picture below. As it has the Air Lift logo on the pressure gauge, I'm assuming I have an Air Lift suspension kit installed with a compressor. I have no documentation other than a note left by one of the prior owners saying air suspension controls under drivers seat, which is what prompted me to look. Once it warms up a little I'll run it and see if I can locate the compressor. Don't want to run it with the temp in the teens in case there's frozen condensation in the compressor. Any suggestions on what pressure I should set them at for a 2350 with slide? On my 31ft Winnie (E450) I run about 50 psi which makes a world of difference, but this is a much smaller unit.

That really depends on the shock absorbers.
I ran  Firestone Ride Rite bags at 40 psi with worn out Motorcraft shocks.  With new Bilstein HD’s the ride is super nice at 25 psi. That’s about  14" measured at the receiver hitch. Mine is a E350 so the leaf springs are softer.

Our previous motor home was built on a Toyota chassis. CLICK HERE to see many pictures of the rig.  I had a 5000 pound rear suspension air bag kit similar to what you have there.  I was told to maintain a minimum of 15 psi or the air bags could get damaged when being driven.  With maximum air pressure, it lifted the rear only a couple of inches.  The system was installed to stabilize the rig when being driven because there was no rear stabilizer bar and none was available.  This was the next best thing.  I quickly learned to keep the airbags at the minimum 15 psi when driving except when more stability was needed.  Otherwise the ride was too harsh.

It's too bad your controller is located where you can't see when driving to properly adjust the air pressure as you drive.  Maybe you can relocate it to a more friendly location.

Here are some pics of the system.

Here is the controller up front by the driver's left knee.


Here is the air compressor, an upgrade to the one originally installed.


Here is the literature on the Air Lift system.