Abstract

The regularities of change of technical condition of combine harvester Slavutich KZC-9F depending on service life are determined. It is determined that after the second year of operation, the readiness factors decrease in one season by 0.044 or 5.2%, and the recovery factors increase, respectively, their productivity decreases.Within the normative costs for overhaul repairs of combines and maintenance of their operability during the harvest after the second season of operation, there is an annual decrease in the readiness factor by 0.036.Analysis of rate of change of indicator of selective assessment of the readiness factor allows us to conclude that the service life of the main units, systems, mechanisms of combines is exhausted by the service life of five to six years and a total output of 1200-1400 hours with an average output for the season of 200-280 hours.If the duration of downtime to eliminate failures after the third year of operation changes to a maximum of 22%, the recovery rate increases by 35%.The productivity of the combine harvesters Slavutich KZC-9F increases with increasing service life due to a decrease in the readiness factor. A decrease in the readiness factor by 0.01 causes a decrease in the productivity of the combine by 21.2 tons/season.

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