SERVICE BOOK OR HOW TO IMPROVE THE RELIABILITY OF COMPLEX AGRICULTURAL MACHINERY
There is no doubt that in the technical specifications (TS) for complex agricultural machinery (grain-harvesting combines), it is necessary to set reliability indicators. However, in practice, they are usually not fulfilled, due to the fact that the test conditions set in the TS never correspond to the actual conditions of the agrophone, under which we can carry out the reliability assessment. For example, the reliability indicators are defined in specifications for combine harvester called "AKROS" made by "Rostselymash" factory should be assessed when harvesting with this combine, under the following conditions: the wheat has to be erect (degree perished of lost not more than 20 %), yields of 40 to 50 kg/ha, weight of 1000 grains is not less than 40 g, the moisture content of the straw from 10 to 18 %, the moisture content of grain from 10 to 18 %, the content of trash in the common cut weight should be no more than 2 % (with respect to the weight of grain to weight of straw 1/1,5), the length of the gun shall be not less than 1000 m; the slope of the field - no more than 20, the soil hardness at a depth of 10 cm, with humidity up to 20 % must be at least 1 MPa; stones larger than 20 mm and foreign objects are not allowed on the field, etc. Such conditions do not occur in practice during tests on the length of the rut. It is proposed to increase the reliability of complex agricultural machinery to calculate the resources of parts, assembly units and aggregates, make them multiples of TS and, as recommendations for replacement, put it in the Service books of complex agricultural machinery