The purpose of the study is to clarify the approach to substantiating the normative values of diagnostic parameters of tractors. The analysis of known developments and regulatory and technical documentation on the topic since 1960 has been carried out. Results. It is shown that the optimization of the normative values of the diagnostic parameters of parts, interfaces, assemblies, machine assemblies, their service life, etc. is still very relevant for the engineering service of the agroindustrial complex. However, there are still few practical operational recommendations for this, although the main approach to substantiating the standards of technical operation of machines has been known since 1925. — technical and economic to minimize direct and indirect total unit costs and technical service costs. With this approach, the achievements of agricultural and motor transport scientists are known, and they are most widely performed by Prof. Mikhlin V. M. Alone, his justifi cation of the values of permissible diagnostic parameters of agricultural tractors is abstract, time-consuming and not widely implemented. Only gradual parametric diagnostic parameters were taken into account, and real mechanical failures were ignored. The infl uence of the permissible values of diagnostic parameters on the reliability and resource of control objects is excessively overestimated. Conclusions. The paper proposes to optimize the values of the parameters that control the technical service from the condition of achieving accounting costs for the technical service of a particular object to the cost of a similar new or renovated object.
Дунаев et al. (Fri,) studied this question.
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