Abstract: A motor unit, particularly for operating machines, comprising an internal combustion engine provided with a cooling system that comprises a first heat exchanger fluidically connected to a cooling circuit obtained in said motor, and ventilation means adapted to generate an air flow through the first heat exchanger; the motor being further provided with a supercharging system that comprises a turbine mounted along an exhaust duct, a compressor mounted along a suction duct and a second heat exchanger placed along the suction duct, downstream of said compressor. The motor unit comprises fluid conveying means adapted to make a flow of cooling air pass through the second heat exchanger, such flow being generated by the ventilation means.

Abstract: A motor unit, particularly for operating machines, comprising an internal combustion engine provided with a cooling system that comprises a first heat exchanger fluidically connected to a cooling circuit obtained in said motor, and ventilation means adapted to generate an air flow through the first heat exchanger; the motor being further provided with a supercharging system that comprises a turbine mounted along an exhaust duct, a compressor mounted along a suction duct and a second heat exchanger placed along the suction duct, downstream of said compressor. The motor unit comprises fluid conveying means adapted to make a flow of cooling air pass through the second heat exchanger, such flow being generated by the ventilation means.

Abstract: A chassis, particularly for self-propelled operating machines, has a frame adapted to support a motorized movement means and a control means of an operating machine. The particularity of the present invention resides in that it comprises at least one ballast member adapted to support mechanical parts of the operating machine, which is an integral part of the frame.

Abstract: A coupling device, particularly for power-operated machines for agricultural use or the like, includes an oscillating frame which is detachably connected to a hitch assembly of an engine and a movable connection for associating with the oscillating frame the working means of a power-operated machine. The oscillating frame and the movable connecting means are configured to maintain, during use, the working plane of the power-operated machine substantially parallel to the ground, independently of the plane of arrangement of the wheels or of the tracks of the engine.