Tractor history, tractor as a vehicle and operation machine, tractor classification, purpose. Tractor consturction concept and review of functional units. Tractor engine characteristics. Tractor transmission composition, transmission parts characteristics, driving bridge, power distribution. Tractor movement over soft surfaces, driving. Tractor pneumatic tires. Control and breaking systems. Tractor ergonomy, noice, vibrations, micro climate, tractor stability and safety. Machine conecting to tractor – requiremens and setting. Tractor PTO and hydraulic tractor systems and specific characteristics. Tractor evaluation from the point of view of application efficiency, environment protection. Tractor safety, tractor control. Contemporary electronics on tractor.