The Filter Cartridge (OEM Part No. 81558479) is a hydraulic filtration spare part designed for a wide range of compatible Epiroc and Sandvik mining equipment, including DL2710, DD210, DL330, DD311, DD2710, DL230, DL431, DT820, DX-700, and DX800. It functions within the hydraulic system to remove contaminants and particulate matter from hydraulic fluid, helping protect hydraulic components and maintain reliable system performance. Designed for demanding mining environments, this filter cartridge supports effective filtration and contamination control during equipment operation. The 81558479 cartridge is suitable for routine maintenance and replacement applications, providing a practical aftermarket solution for maintaining hydraulic system cleanliness, supporting equipment reliability, and helping reduce maintenance costs and downtime.