Off-road heavy-duty prime-movers with a wheel arrangement 6×4, 6×6, 8×4, 8×6, 8×8, 10×4, 10×10 and capacity up to 1000 hp. are used for transportation of special and extra-heavy large-sized cargoes as a part of road trains from trailers and trailer trains for transportation of large-sized heavy cargoes, full weight over 500 tons, including on cross-country terrain I-IV category at an temperature from -50 ° to + 50 ° Celsius. Prime movers are used tractors of semitrailers and modules. There are different modifications and types of prime movers, depending on the weight and type of semi-trailer/ module.

Heavy-duty prime mover is ready for operation in the most severe road conditions:

• box-shaped frame of ultra-high-strength;
• multi-liter heavy-duty diesel engine;
• hydro mechanical semi-automatic or automatic transmission;
• built-in highly efficient hydrodynamic delay mechanism;
• a torque converter.

The reinforced axles of the heavy hauler are equipped with inter-axle and inter-wheel differential locks and heavy-duty leaf suspension.