TM 9-2330-373-14 & P
1-7. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
u. LEVELING JACK
A leveling jack and jack shoe are provided at each rear
corner of dolly.
It consists of housing assembly, screw, braces, and
removable jack shoe.
Leveling jack shoe is stowed on crossmember to rear of
leveling Jack.
Jack is used to level and help stabilize semi trailer.
v. AIR MOUNTED FIFTH
WHEEL KINGPIN
1. Shock absorber
2. Air spring
3. Height control valve
Two air springs (2) are located at front of semi trailer, directly over kingpin plate. Air springs contain pressurized air.
Height control valve (3) is located between and slightly to rear of the air springs.
Air flow is automatically regulated by height control valve in proportion to the load until proper design height is obtained.
Brake valve is located above and slightly to rear of air springs.
The brake valve maintains minimum air pressure.
Two shock absorbers (1), one located on outer side of each air spring, cushion shocks.
TA 314700
1-17
