Study of starting and expiry dates of logging operations in winter felling areas of the North-West Federal District of the Russian Federation on the example of the Republic of Komi

Modernisation of the Ponsse Ergo SMRM articulated joint at Mobile Service LLC

“…The objective of improving the operational efficiency of forestry equipment in general and multi-operational forestry machines in particular [1,2,3] to increase productivity, increase the yield of business timber, reduce operating and maintenance costs [4,23,26,27] is particularly relevant due to climatic factors affecting the duration of the logging period in the NWFD of the Russian Federation [5,6]. The following activities of Mobile Service LLC (Syktyvkar, Komi Republic) are registered as the main types of operations: provision of services for installation, repair and maintenance of machines for agriculture, including wheeled tractors, and forestry, as additional activities: provision of services for installation, repair and maintenance of other general purpose equipment, not included in other groups; provision of services for installation, repair and maintenance of other special purpose machines, not included in other groups; provision of services for installation, repair and maintenance of other special purpose machines, not included in other groups; provision of services for installation, repair and maintenance of other special purpose machines, not included in other groups; provision of services for installation, repair and maintenance of other special purpose machines, not included in other groups; provision of services for installation, repair and maintenance of other special purpose machines, not included in other groups; provision of services for installation, repair and maintenance of other special purpose machines, not included in other groups.…”

“…It should be noted that LLC "Mobile Service" is a contractor of JSC "Mondi SLPK" in terms of providing services for timber harvesting and maintenance of the fleet of forestry equipment (including "full-service"), the number of employees is 68 people, was founded in 2012, which determines a large accumulated experience of the enterprise in analysing the experience of the fleet of forestry equipment operation. A number of works [7,8,9,10,11] are devoted to the operating conditions and possibilities to improve the reliability of forest machines, but there is a deficit of works on modernisation of feller-delimber-buncher (FDB) joint (AJ), which is a particularly loaded element of the design. It is worth noting that when repairing AJ to replace structural elements (cylindrical axial pin of the articulated joint, hydraulic cylinder of the frame control, sleeve pin) there is a labour-intensive "rolling" of the tractor in severe natural and industrial conditions (most often in the forest), the inter-service interval is 1 500 -4 000 motor-hours [12,13].…”