UNCOUPLING GOOSENECK FROM PRIME MOVER (Continued).
Release the downward pressure of the gooseneck kingpin on the prime mover fifth wheel
bedplate by lowering the gooseneck a slight amount beyond the resting point where the trailer
contacts the ground or wooden blocks.
Disengage the Power Take Off (PTO) on the prime mover to relieve the hydraulic pressure.
The hydraulic system is under extreme pressure. Serious injury or death may
occur if the PTO is left engaged during disconnecting of the hydraulic inlet and
Disconnect the hydraulic inlet and outlet lines from the prime mover to the gooseneck
hydraulic connectors (1), wipe the connectors clean, install the dust covers and store the
lines in the gooseneck forward storage box.
Unlock the fifth wheel by pulling the secondary lock handle (5) out and lifting up on the
handle until it locks in place. Then pull the primary lock handle (4) out and lift up until it
also locks in place.
Extreme caution should be taken when releasing the fifth wheel lock handles
that the observer stands clear of the prime mover rear wheels before driver
moves the vehicle. Serious injury or death may occur if the observer is caught
between the prime movers rear wheels.
Slowly drive the prime mover forward from under the gooseneck kingpin while observing
that the kingpin clears the fifth wheel and the rear bumper of the prime mover.
If the kingpin does not clear the rear bumper of the prime mover, it may
momentarily be lifted out of the gooseneck kingpin recess to complete the