Coupling Semitrailer to Towing Vehicle
c. Connect Intervehicular Hoses.
This operation is performed to lock the brakes and
prevent movement of the semitrailer. Landing legs may
be damaged if the semitrailer moves.
(1) Connect the two air hoses marked SERVICE (1, fig. 2-15) and EMERGENCY (2)
on towing vehicle to corresponding air hose couplings on the semitrailer.
(2) Open air lines shutoff valves on towing vehicle.
(3) If no air leakage is detected, apply the brakes on the semitrailer from the
Connecting Intervehicular Hoses