The aim of the study is to prevent the machine´s withdrawal from the technological trajec-tory in conditions of the slope agriculture. The object of study is the process of wheel tractor´s withdrawal of a given course in the mode of operation on sloping areas of the support surface. The results of theoretical studies of the power balance in the process of interaction between the tread elements with an inclined supporting surface are given. The functional relationship of pow-er given on the tractorexchange rate stability and configurational, geometric parameters of the tread´s working elements of the wheel mover.

The aim of the study is the reliability of feed mill´s improvement by the study of hammer´s design parameters and the choice of the materials for its manufacture. The object of study is the process of the hammer´s wear in a feed mill of the hammer type. The results of theoretical re-search to improve the wear resistance of feed mill hammers´ are given. Analyzing feed mill work, we came to the conclusion that the hammer deviates from the radial position to the corner α. Theoretical calculations found that to avoid grain´s slipping on a hammer of a feed mill, a hammer with known cutting edge´s angle of 16-18º must be manufactured.