Agricultural machine (10, 10′) comprising an engine (11) for power delivery, at least one axle (12) provided with two wheels (13), a handlebar (14) and a power take-off (15), said agricultural machine (10, 10′) further comprising a hydromechanical clutch group (20) interposed between said engine (11) and said at least one axle (12) and a first (16) and a second lever (17) associated with said handlebar (14) controlling said hydromechanical clutch group (20), said hydromechanical clutch group (20) comprising a actuation piston (30) hydraulically controlled by said first (16) and second lever (17) movable between a first raised position, in which said actuation piston (30) imposes to said hydromechanical clutch group (20) the transmission of the motion from the engine to the wheels and to the tool, and a second lowered position in which said actuation piston (30) frees said hydromechanical clutch group (20) by kinematically disconnecting said engine from said wheels and said tool.
