The CUP-OIL PUMP (OEM Part No. 5541377900) is a mechanical lubricating oil pumping component compatible with Epiroc ST1030 mining equipment, including older and newer ST1030 configurations. Manufactured from durable steel, the pump is designed to deliver lubricating oil to designated components, supporting proper lubrication and reducing friction and wear during equipment operation. Reliable oil circulation is essential for maintaining mechanical performance and protecting moving components in demanding mining environments. As a replacement lubrication system component, 5541377900 is suitable for routine maintenance and repair applications. It provides a practical solution for restoring oil pumping performance and supporting dependable operation of ST1030 underground mining machinery.