With the leveling valve
Yes
If you don't know what you're doing, best to have someone who does do this for you. With the trailer disconnected, you'll see a lever valve which connects to your rear air suspension. Lifting up on this increases the amount of pressure in the air bags - pushing down on it decreases the air pressure.
From the bottom of the frame, to the center of the axle housing, it is suppose to be 8¾" without a trailer. With the trailer, the measurement should be 8½"
If the primary air system on the tractor is already charged, it should air up within 20 seconds.
The Bendix OEM knobs for those valves are yellow and red. Yellow is for the brake control valve, which releases the brakes on the power unit. The red is for the trailer supply valve, which provides air to the trailer, both to release the trailer brakes, to inflate the air ride suspension, and to actuate the brakes when the brake pedal is depressed.
Whenever the shocks are deficient... e.g., leaking oil, damaged, excessively hot after driving.
I am pretty sure the dealer can do it or you can but a NGS scan tool or something similar.
Yes, a fifth wheel camper can be towed by a tractor trailer. However, you might need to lower the air bags of the tractor trailer (or simply adjust them so they're lower when they're inflated) to accommodate the camper.
They are what's used to connect the trailer to the trailer supply air lines.
Year and model would be really great as you could be talking about a semi truck or a lincoln. But on late model Lincolns the air ride is monitored by the BCM or body control module, any adjustments will need to be made by a computer that can interface with it.
supplies air to the trailer brakes to allow the operator to release the brakes
there is a kirby air ride