Moxy challenged conventional articulated-hauler wisdom by taking the capacity of its new MT51 to nearly 51 tons. The articulated truck's 68,900-pound unladen weight is lighter than three competitors in the 40-ton class.
The truck is surprisingly compact, matching the wheelbase of the MT41. Overall length, height (bed down), and width are about the same as Caterpillar's 740. The MT51's 11 foot-8 inch loading height, however, is higher than any ADT on the market — even that of Bell's new 50 tonner, the B50D.
The Cummins QSX15 six-cylinder diesel engine rated at 510 horsepower, an Allison 4600 ORS automatic transmission, and a two-speed drop box deliver power to the axles.
Moxy's unconventional rear frame slopes down toward the articulation joint. Combined with a wide stance, it lowers the truck's center of gravity. The result, the company claims, is stability that eliminates temptation to invest in costly wide, low profile tires.
A new cab, and the company's nitrogen-charged independent front suspension keep the driver comfortable. All Moxy artic dumps have permanent six-wheel drive for equal power distribution, with limited-slip differentials (maximum 45 percent lockup) on each axle.
Moxy believes strongly that its unique articulation joint, which places the hinge behind the turning ring, distributes weight to each wheel more equally in tight turns and rough terrain than competitive hinges that place the hinge in front of the ring.