Airstream LAND YACHT 1989 Owner's Manual page 39

AIR LINE SCHEMATIC
Below Floor
1. Air Bag
2. Cone, Air Bag
3. Air Supply Tank
4. Leveling Valve
5. Air Valve, Tire Type
Above Floor
6. Solenoid, Air Relief
7. Compressor
8. Switch, High Pressure
9. Coupler, Air Hose Fitting
10. Check Valve
11. Sender, Air Pressure
The logic of the air system is as follows: The compressor supplies air
pressure through a check valve into the air supply tank. The air supply
tank provides pressure to the intake side of the leveling valve. When the
leveling valve is opened by the body of the coach lowering over the
chassis, the air pressure is supplied to both air bags through a "T", raising
the coach back to the proper height.
The high pressure switch controls the air pressure in the air supply tank.
The switch comes "on" when the pressure drops below 80 psi and shuts "off"
when the pressure reaches 100 psi.
The sender monitors the pressure in the air bags and sends the appropriate
signal to the air gauge on the dash.
C-5