Hydraulic gooseneck Many people want to know why choose hydraulic gooseneck and why choose draw bar (towing bar). Normally our powered gooseneck is equipped with diesel engine (we call it power pack, too). The following information list advantage of gooseneck: With goose neck, hydraulic jack(cylinder) in the goose neck will put force on the tractor, no need to put counter weights on the truck(prime mover), and increase payload capacity and maneuverability of modular trailer. In China, gooseneck trailer (called semi trailer) is allowed to run on high speed way, draw bar trailer (called full trailer) is not allowed. Hydraulic gooseneck trailer has more stable and accurate steering compare that of draw bar trailer. The force prime mover bore from gooseneck is adjustable. Height of kin pin is adjustable, so it is easily to detach gooseneck (trailer) from tractor. It is hard to back a draw bar trailer, easy to reverse a neck trailer.