This oil pump is engineered to meet standardized specifications for construction site excavator operation, delivering consistent lubrication support for long-duration heavy load working conditions. Made from high strength alloy materials, it offers excellent structural durability and heat resistance, effectively reducing wear of internal moving components during continuous operation. The precision machined internal structure maintains stable fluid flow during equipment operation, avoiding abnormal pressure fluctuations that could affect excavator power output. Physical interception structure design blocks large particulate debris from entering the lubrication circuit, maintaining flow integrity of the lubrication system. It fits standard installation dimensions of corresponding models, eliminating the need for secondary modification during replacement, effectively shortening equipment maintenance downtime at construction sites.