The analysis of the Russian and regional mar-kets of agricultural tractors which basis is made by model ranges of mobile power means of a wheel formula 4k4a of the improved classical configura-tion is carried out. In agrarian and industrial com-plex of Krasnoyarsk Region wheel Belarus tractors of which about 45 % of number of tractor park are the share prevail. In the last two years the market of the Belarus-1523 tractors which in short term have to make a basis of power means of 2.0-3.0 traction classes of tractor park extended. Models and algorithm of optimization and rational distribu-tion of its operational weight on axes by regulation of quantity of motionless ballast freights in forward part of a skeleton and on disks of back wheels are developed for effective use of this tractor in tech-nologies of tillage , different in power consumption. By the results of modeling and experiment optimum values of the main indicator of technological effec-tiveness, i.e. specific mass of the tractor for opera-tions of tillage of different groups are established. The adaptation of the tractor on unary wheels to operations of tillage of the third group in the range of working speeds from 3.0 to 3.8 m/s at nominal traction force of 22.0 kN is provided by a basic complete set without removable ballast with specific weight. In the high-speed range from 2.0 to 3.0 m/s on operations of tillage of the first and second groups’ installation of forward ballast weighing 500 kg and two freights on 165-170 kg on disks of back wheels reaches the most effective use of a tractor with nominal traction force of 27.1-29.7 kN. The installation only of forward freights weighing 500 kg recommended by the manufacturer reduces nomi-nal traction force of the tractor when performing operations of tillage of the first and second groups by 7-8 %.