This manual covers the Case 980B Excavator, designed for demanding operational environments. The engineering quality and reliability of this equipment are supported by comprehensive documentation that details its operational functions, engine specifications, and transmission mechanics. This manual serves as an essential resource for understanding and operating the 980B Excavator effectively. This document provides detailed information on maintenance procedures, including lubrication, adjustments, and special maintenance tasks, along with comprehensive data on fuels and lubricants. It also covers the hydraulic and electrical systems, mechanical components, and troubleshooting guidance for issues such as circuit breakers. With diagrams, illustrations, and charts, this manual is an indispensable tool for owners, operators, and technicians to ensure the optimal performance and longevity of their Case 980B Excavator.