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An articulated hauler, articulated dump truck (ADT), or sometimes a dump hauler, is a very large heavy-duty type of dump truck used to transport loads over rough terrain, and occasionally on public roads. The vehicle usually has all-wheel drive and consists of two basic units: the front section, generally called the tractor, and the rear ...
There are two classes of the machines currently in production: both are "rigid dumper" models (dump trucks with a rigid frame, non-articulated). The smaller construction and quarry trucks (30 ton - 90 ton) are dwarfed by the larger mining trucks in the 140 ton - 450 ton range. Production was moved from Euclid, Ohio, to Guelph in Ontario, Canada ...
Moxy built the first prototype dump truck in 1970. The first model was a heavy duty dump truck drawn by a powerful tractor with rear wheels driven by hydraulic motors. The next version, an articulated dump truck driven by a Scania diesel engine, D20, was also finished in 1970.
A standard dump truck is a truck chassis with a dump body mounted to the frame. The bed is raised by a vertical hydraulic ram mounted under the front of the body (known as a front post hoist configuration), or a horizontal hydraulic ram and lever arrangement between the frame rails (known as an underbody hoist configuration), and the back of ...
In 1964, the Payhauler 180 entered service. The 45-ton (43t) truck became the first large, all-wheel-drive end-dump truck in the market. In 1973, the original rear-drive model trucks were discontinued, and the all-wheel-drive truck models were designated the Payhauler 330 and 350 for their 45-ton (43t) and 50-ton (45t) trucks respectively. [1] [2]
It is the largest articulated haul truck offered by Caterpillar; larger trucks use a rigid frame system. The ejector uses a 4-cylinder hydraulic ram and blade to dump the material out, a similar system to Cat's wheel tractor-scrapers. The 740 Ejector is sold as separate model from the usual 740.