TM 9-2330-373-14 & P
1-13. AIR SUSPENSION SYSTEM
The air suspension system is designed to operate at a set ride height. The two height control valves are used to maintain
the proper axle-to-frame relationship necessary to regulate ride height.
The height control valves automatically regulate air to or
from air springs.
The valves operate each side independently, thus
maintaining a side to side semitrailer level condition at all