This workshop repair service manual covers Case IH models 2390, 2394, 2590, and 2594, primarily produced in the 1980s. These tractors are known for their robust engineering and reliability, representing significant advancements in agricultural machinery for their era. They were designed for demanding tasks, offering substantial power and durability, and are recognized for their productivity and longevity in their class. The Case IH brand itself has a long heritage in agricultural equipment, underscoring the quality and performance expected from these models. This comprehensive manual provides detailed information for all models, engines, transmissions, and trim levels. It covers essential areas including routine maintenance, engine service, lubrication, cooling, fuel, clutch, transmission, drive train, rear and front axles, brakes, steering, bodywork, intake and exhaust systems, and the hydraulic and electrical systems. With hundreds of pages of instructions, diagrams, and specifications, this manual is an indispensable resource for owners, mechanics, and technicians. It facilitates efficient maintenance, accurate troubleshooting, and thorough repair, ensuring the continued optimal performance and longevity of your Case IH tractor.