Preparing the Trailer for Uncoupling

1. Slowly back the tractor tightly against the trailer to relieve pressure on the fifth wheel locks.
2. Apply the tractor and trailer parking brakes.
3. Chock the trailer rear wheels.
4. Lower the trailer landing gear until the weight is removed from the fifth wheel.
5. Disconnect the tractor-to-trailer air lines and electrical cable. Plug the air lines to prevent dirt or foreign material from entering the lines.