High-security and low-noise agricultural machine

An agricultural machine comprising an engine for power delivery, at least one axle provided with two wheels, a handlebar and a power take-off, said agricultural machine further comprising a hydromechanical clutch group interposed between said engine and said at least one axle and a first and a second lever associated with said handlebar controlling said hydromechanical clutch group, said hydromechanical clutch group comprising an actuation piston hydraulically controlled by said first and second lever movable between a first raised position, in which said actuation piston imposes to said hydromechanical clutch group a transmission of a motion from the engine to the wheels and to a tool, and a second lowered position in which said actuation piston frees said hydromechanical clutch group by kinematically disconnecting said engine from said wheels and said tool, there being provided a device for braking the agricultural machine and the tool with said hydromechanical clutch group disengaged, there being provided an oil pump for introduction of pressurized oil into a housing chamber of said piston, said oil pump comprising a pump body having on one side an 8-shaped seat for accommodating a drive gear and a driven gear and closed by a plate, said oil pump on an outside of said pump body on an opposite side of said plate comprises an outer actuation gear keyed on said drive gear and engaged with said hydromechanical clutch group.