Park the tractor-trailer on level ground, turn off the engine and set the parking brake.
Lower the lowboy trailer to the ground with the first in a series of hydraulic levers on your hitch controls, on the driver's side of the cab. This positioning may vary, depending on your lowboy's manufacturer, so consult your trailer's manual if the lever isn't labeled.
Flip the trailer release knob, marked or identified in your manual, once the trailer is resting completely on the ground.
Drive the tractor away from the trailer.
Unhook the heavy equipment being towed, then drive it or haul it off the front ramp of the lowboy trailer.
