The Case International Harvester / David Brown 94 Series tractors, encompassing models 1394, 1490, 1494, 1594, and 1690, represent a robust line of heavy-duty agricultural machinery, primarily produced in the 1980s. These tractors are recognized for their durable engineering, powerful diesel engines designed for strong lugging capabilities, and reliable performance in demanding farm operations. Building on the heritage of both David Brown's distinctive engineering and Case IH's established presence, these tractors offered a range of horsepower and features, making them competitive within the agricultural sector. Their design prioritizes mechanical and hydraulic functionality, providing essential power and versatility for a wide array of farming tasks. This comprehensive Service Repair Workshop Manual is meticulously designed to serve as an indispensable resource for owners, mechanics, and technicians. It covers all critical aspects of the Case International Harvester / David Brown 94 Series tractors, including detailed maintenance procedures, systematic troubleshooting guides for common and complex issues, and step-by-step repair and rebuild instructions for all major systems. The manual provides in-depth information on engine, transmission, hydraulic, electrical, braking, and steering systems, along with chassis and operator station components. Furthermore, it includes essential technical specifications, torque values, and diagnostic procedures, all presented with detailed diagrams and illustrations to ensure accurate and efficient upkeep and repair of these powerful agricultural machines.