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The first modular self-propelled trailers were built in the 1970s. In the early 1980s, heavy haulage company Mammoet [6] refined the concept into the form seen today. [7] They set the width of the modules at 2.44 m, so the modules would fit on an ISO container flatrack. They also added 360° steering. [8]
Tiiger four-axle HMT module at Transporter Industry International headquarters in Haryana, India. A hydraulic modular trailer (HMT) is a special platform trailer unit which feature swing axles, hydraulic suspension, independently steerable axles, two or more axle rows, compatible to join two or more units longitudinally and laterally and uses power pack unit (PPU) to steer and adjust height. [1]
The ballast box is a metal box installed on the rear chassis of the tractor instead of the fifth wheel coupling. Earlier heavy haulers unmounted the fifth wheel and used merely a piece or two of heavy rocks, stones or concrete blocks which weighted enough to avoid wheel spin, [4] later builders and heavy haulers developed metal boxes of ...
Caterpillar 740 Ejector going up an incline Articulated hauler dump truck video. 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.
Trailers containing differing cargos can be rapidly swapped between tractors, eliminating downtime while a trailer is unloaded or loaded. Drawbar couplings are also found, particularly in dedicated exceptionally heavy-duty ballast tractors and as a means to connect intermediate fifth-wheel dollies for pulling multiple semi-trailers.
Nicolas Tractomas is a heavy-duty built-to-order ballast tractor specifically to tow hydraulic modular trailers and road trains used for movement of oversize loads manufactured by French manufacturer Nicolas Industrie based in Auxerre. The tractor was bespoke build with preferred engine, gearbox, drivetrain and ballast with a Renault Kerax cabin.