(4) Unhook two hooks (3) from opening in upper suspension arm (5). Move hooks (3) out from under hydraulic
and pneumatic hoses on upper suspension arm (5).
(5) Open suspension isolation valve (12), handle pushed inboard facing toward front of semitrailer (para. 2-6).
(6) Raise platform (para. 2-19) to normal running height of 43 inches (109 cm).
(9) Remove axle isolation chain from bogie. Restow axle isolation chain.
PARKING LOADED SEMITRAILER
For parking a loaded semitrailer while coupled to a tractor, perform steps a thru c
or injury to personnel may result.
For parking a loaded semitrailer and uncoupling from a tractor, perform steps a
thru d or injury to personnel and damage to equipment may result.
a. Apply tractor and semitrailer parking brakes.
b. Ensure semitrailer front bogie wheels are chocked in front and behind each outer set of dual tires.
c. Lower both front and rear support legs (para. 2-22 and 2-23) to support platform.
d. Uncouple tractor/semitrailer and lower gooseneck to lowest position (para. 2-24).