Control assembly for operating an agricultural tractor

An agricultural tractor having a driver's seat arm rest including an arm rest body, an electronically controlled power-shift transmission with a reversing gear and associated first control members for the gear ratio shifting and second control members for selecting forward speed and reverse speed, and an electronic control device of the engine rotation speed with associated third control members, wherein said control assembly is an electrical control unit arranged on said armrest and fitted within a front depression of the arm rest body, substantially flush with said body, and wherein said first, second and third control members are constituted by respective keys grouped on said control unit;

• said arm rest further comprising a substantially vertical support and said arm rest body being connected to said support in a swingable way around a substantially horizontal axis oriented transversely of said body, in a longitudinally displaceable way and in a rotatable way around a substantially vertical axis;
• first, second and third adjustment means being provided for adjusting the inclination of said body relative to said support around said substantially horizontal axis, for adjusting the longitudinal position of said body relative to said support, and for adjusting the angular position of said body relative to said support around said substantially vertical axis, respectively, and wherein said arm rest body is further provided with a manually operable consent push button for inhibiting or enabling activation of said control unit.