Abstract
With the active development of the mining sector, the share of open pit mining is increasing. It should be noted that the increase in the volume of open-cut mining depends on the volume and methods of excavation works. The main technological equipment performing up to 80% of the total volume of excavation and movement of minerals in open pit operations is hydraulic excavators. Consequently, efficient and highly productive operation of a hydraulic excavator directly affects the efficiency and profitability of mining operations. An important factor of development of mining industry today is to improve the reliability of technological machinery, namely energy efficiency, durability and maintainability of equipment. At the modern stage of development of mining equipment, the use of mine excavators with a hydraulic drive of the working mechanism occupies a wider and wider niche