The YANMAR B7-Sigma (EP) excavator, designed for construction and earthmoving operations, represents a commitment to robust engineering and operational efficiency. This model, identified by serial numbers 50501 and above, is built for reliability and performance in demanding environments. Its design prioritizes user safety and ease of operation, making it a valuable asset for professionals engaged in various excavation tasks. This Operation & Maintenance Manual provides comprehensive guidance for the YANMAR B7-Sigma (EP) excavator. It covers essential areas including basic precautions, operating instructions, transportation, and special condition care such as cold weather and long-term storage. Detailed maintenance procedures, servicing guidelines, consumable information, and troubleshooting steps are included to ensure optimal performance and longevity of the equipment. Technical specifications, safety information, and part ordering procedures are also detailed within this English-language document.