This Service Workshop Manual provides comprehensive information for the Case CX75SR and CX80 Hydraulic Crawler Excavators. These machines are engineered for demanding construction and earthmoving applications, offering robust performance and reliability. Their design prioritizes operational efficiency and durability, making them essential tools for a wide range of heavy-duty tasks. This manual is designed to assist owners, technicians, and mechanics in maintaining and repairing these excavators. It covers critical systems including distribution, power production, travel, body and structure, frame positioning, working arm, tools and couplers, and provides detailed hydraulic and electrical schematics. With clear, easy-to-follow instructions, accompanied by pictures, diagrams, illustrations, and charts, this English-language document is fully searchable, indexed, and printable, ensuring efficient access to all necessary technical data.