A tow dolly cross rail assembly includes a male bar and a pair of female bars arranged in a slidable relationship, which creates a positive camber effect at a pair of dolly tires at the outer ends of the bars. The male bar comprises an apex that forms an angle that orients upwardly, forming an angle between about 165 to 180. The center male bar and pair of female bars are arranged in a slidable relationship with each other. The midpoint of the center male bar forms an apex. The inner end of the female bars is in slidable relationship with free ends of center male bar. The female bars telescopically slide along the free ends of the center male bar for increasing and decreasing length of cross rail. The arched configuration of center male bar slopes the female bars to create positive camber at the dolly tires.

A vehicle dolly comprises two parallel lifting axle assemblies and two wheel assemblies, two ends of each of the lifting axle assemblies being detachably connected to the two wheel assemblies, each of the wheel assemblies comprising: a main beam; a first support wheel and a second support wheel; a first mount assembly and a second mount assembly, the first mount assembly connecting the first support wheel to a first end of the main beam, the second mount assembly connecting the second support wheel to a second end of the main beam; and a plurality of lifting means, each lifting means being provided between each mount assembly and the main beam, each lifting means comprising a screw rod and a corresponding nut that cooperate with each other to lift and lower the main beam relative to the support wheels. It enables long-distance and high-speed vehicle moving and makes operation more convenient.

A towing dolly assembly includes a beam having first and second ends and a longitudinal axis, first and second spindle assemblies arranged at the first and second ends, respectively, and first and second axle cradle assemblies arranged adjacent to the first and second ends, respectively. The first and second spindle assemblies include first and second cam locks and first and second locking arms, respectively. The first and second cam locks are fixedly attached to a first side of the beam. The first locking arm is pivotable about a first axis extending perpendicular to the longitudinal axis between the first side and a second side of the beam. The second locking arm is pivotable about a second axis extending perpendicular to the longitudinal axis between the first and second sides of the beam.

A portable dolly for use in towing a tractor including at least one wheel for moving the dolly, a first king pin configured for placement in a mating engagement with a fifth wheel on the tractor, a second king pin configured for placement in a mating engagement with a fifth wheel on the tractor, and a plurality of chains for connecting the dolly to the tractor, wherein the dolly is configured to assist a tow truck with towing the tractor from the tractor's front end without removing the front drive axle and drive shaft on the tractor. A lift mechanism is provided for lifting the tractor off the ground into a position that is suitable for towing.

A tow dolly lift having a tubular member that is connected to a hydraulic system configured to lift a vehicle. The tubular member includes an extendable arm and a platform body, the hydraulic system includes a pair of hydraulic lifting pistons and a power source, and the tubular member is operably connected to the hydraulic system. In operation, the tubular member raises the vehicle upwardly and extends outwardly from the tow dolly to lower and extend under the vehicle. The tubular member then lifts the vehicle upward onto the tow dolly under hydraulic power. In this way, the tow dolly lift automatically secures the vehicle to the tow dolly. The tow dolly lift is assembled into a tow dolly lift or be a standalone unassembled tow dolly lift kit sold as an aftermarket item.