One of the main characteristics of combine harvesters is to harvest out crops in one pass, while collecting grains from the field and separating from impurities and straw (material other than grain - MOG), which are being taken back to the field, while the quality of the work varies. The content of impurities, a plain and broken kernels, is not desirable in seed neither in the mercantile grains using in further processing, because it significantly complicates cleaning and storing of grains, and significantly reducing the quality of the product and it’s market value. Harvesting device of combines with the traditional scheme of threshing TTO (drum cross-transversal, grain mass flow goes tangentially and straw-shakers oscillatory separate grains), is limiting factor in the combines work , with increasing speed increases the flow of grain mass, increasing losses and impurities in the mass after harvest. The quality of the work is influenced by numerous factors: moisture content, grain-straw ratio, yield levels, compliance of the peripheral speed of underdrum-drum and it’ spacing, setting sieves, fan speed, mode of working speed. In cases where these parameters are not properly aligned, performance is significantly distorts, so that a high content of impurities in harvested mass.This paper presents the results of exploitation research of the working quality of harvesting devices of combines ZMAJ 133 and CLAAS D48 in harvesting of rye and triticale in agroecological conditions of Kosovo and Metohia. The objective of our study was to determine the quality of the separation devices of the combines, the contents of the whole healthy, broken, a plain grains and other impurities. Quality threshed mass was determined by taking samples of threshed mass from the combine’s bunker, and percentage of healthy, full, broken kernels and impurities have been determined later in the laboratory. It has been applied standard methodology, which refers to the field and laboratory testing, as well as exploitation testing of the combines. Based on these results, it was concluded higher quality work of the threshing device CLAAS D48 in relation to the harvester ZMAJ 133B. In the harvested mass at the combine CLAAS D48, it has been measured the highest content of the whole grains and the average was 97.10%, the lowest has been measured in the combine ZMAJ 133B to 92.19%. The contents of broken grains varied in the range of 0.91% (CLAAS D48 ) to 2.53% (ZMAJ 133B).

Combine, quality, threshing device, cleaning, rye, triticale .

Presentation: oral