The wheeled running gear of an agricultural tractor must have sufficient traction and coupling properties to ensure that the tractor fulfills its main function. The solution to these problems depends to a large extent on the search and implementation of measures for improving and developing new tire designs, which are the main element of the wheel drive that meets modern requirements. The developing of new pneumatic tires requires creating a new formulation of rubber and materials, the use of rubber-oligomeric compositions that allow implementing new, advanced technologies in the manufacture of tires. Currently, tires based on rubber-oligomeric compositions are being created. In particular, the Austrian company Lim developed a range of wide-section tires based on oligomers. As a result of tests of tires for class 3 tractors, it was determined that the oligomer tire 66×43.00-25 has the best traction and energy performance on all supporting foundations, compared to the serial tire 21.3R24.

Hydraulic systems that damp active oscillation operate according to a certain non-linear and time-varying algorithm. It is difficult to create a controller based on its dynamic model. This chapter proposes a new operation regime of the controller based on neuron nets by combining the advantages of the adaptive, radial, and basic functions of the neuron net. Its undoubted advantages are a learning (tilting) ability in real time to process indefinite, nonlinear disturbances, and to change the value of the active force in the hydraulic leaf spring by adjusting the weight coefficients of the neuron net and/or the radial parameters of the basic function. The model is a ¼ hydraulic active sprung mass of a mobile vehicle. The modeling shows that the use of a neuron net controller makes the sprung mass much more efficient.

The method for determining the probability of failure-free operation of the electronic control system of the engine of machines, which allows not to release them on the line in a pre-failure state, is presented, and the main reasons for the occurrence of failures and malfunctions in its elements are presented. The given information can be applied in the course of forecasting the residual resource of the given system.

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The analysis of the carried out experimental studies has shown that when a combine harvester-thresher is equipped with the experimental tire of size 30.5E-32, it has less pressure on the soil substructure (by 11–28 %) than other options and lower voltage values in the arable horizon. As a result of testings for the impact evaluation of propulsion units in combine harvester-threshers on the soil, it has been established that GOST (All-Union State Standard) 26955-86 requires clarification of coefficients K1 and K2, which should be determined for various structural tire sizes and on different soil backgrounds, as well as the fact that when evaluating the impact of the wheel machines on soil processes it is necessary to take into account the residual normal voltages established at various depths.