(4) If tractor/semitrailer combination will approach level ground, proceed to paragraph 2-32d. If tractor/semitrailer
will not approach level ground, stop and lower platform (para. 2-19) to normal height of 43 inches (109 cm).
d. Approaching level ground from downhill grade.
(1) Stop tractor/semitrailer combination before reaching level ground.
(2) Lower platform (para. 2-19) to minimum suggested height (1 inch of suspension cylinder plunger/piston
(3) Pull onto level ground.
(4) When semitrailer is fully on level ground, stop and raise platform (para. 2-19) to normal height of 43 inches
This procedure is to be used to release the brakes in the event of system failure,
tire changing, or operation with a disabled bogie due to air brake problems.
a. Make sure semitrailer is parked on level ground and front bogie wheels are chocked. If semitrailer is coupled to a
towing vehicle, apply towing vehicle parking brakes.