With the technological scheme with preliminary removal of foliage machine must be collected in the bunker at least 70% of the crop foliage. When cleaning the tops are not allowed to collapse rows of potatoes wheel assembly, the destruction of tuberous nests, extracting tubers on the surface of the field or being damaged. machine continues to collect the tops in the hopper and unload it in vehicles or collect it at the end of estrus in a heap. It should also be provided for spreading chopped tops in the field. Potato and potato harvesters have to dig up the tubers at a depth of 21 cm and a width of nests tubers to 40 cm Potato should draw on the field surface at least 95% of the crop of tubers. Tubers dug dvuhryadkovym diggers sifting type should be stacked strip no wider than 1 m. With separate cleaning Potato tubers should be dug to lay a felling of two, four or six rows.
This should remain the passages for the wheels combine-up. The width of the roll formed from two dug rows should be no more than 70 cm, and four – six rows – no more than 90 cm The thickness of the layer of soil and tubers in the rolls should not exceed 10 cm in the work of Potato allowed damage is not more than 3% of tubers by weight. Harvester shall collect in the hopper at least 97% of the potato crop. Loss of all species are not must not exceed 3%. Clean potatoes in the container should be at least 80%. Number of mechanical damage to tubers of all types are allowed no more than 12%.
When separate harvesting potato harvester with the selected device should collect from the roll formed valkoukladchikom-diggers, with two or four – six rows of at least 95% of tubers. Varieties of potato harvesters of modern potato harvesters were formed in result of the combination and the combination in a variety of relatively small amounts of separating and supporting the working bodies, different methods of issuance of tubers, as well as the use of different methods block design combines with power tools. By way of aggregation harvesters can be divided into trailers, semi-mounted, mounted and self propelled. The first and second type of processor can be divided into having its own motor for driving the working bodies or agencies working with the drive shaft from the tractor pto. However, the assignment of the combine to a particular class or group on these indicators have not yet completely characterizes its design and technological features. Therefore, as the most important classification criteria characterizing the technological scheme of the combine, take the following indicators: completeness of execution combine the required operations, sequence of operations of the technological process, the nature of a process of separation shallow soil, type of ground separating the operating entity, type of working body for separating solids; direction of the mass in the implementation process, method of collection and issuance of tubers. Potato harvesters must perform the following enlarged operation: broken into beds with tubers, the tubers separated from the shallow soil, soil clods, stones, leaves and vegetable matter; submerge the potatoes in vehicles. Each of the consolidated operations in the implementation mechanized by dismembered into smaller ones, running one or more working bodies.