The Case IH 1390 is a robust utility tractor, produced from the mid-1980s to the early 1990s, designed for heavy-duty farm operations. Known for its reliable Perkins diesel engine, typically around 3.9 liters and producing 50-70 horsepower, and a versatile transmission offering 8 forward and 2 reverse speeds, this tractor is built for durability and consistent performance. Its engineering emphasizes practical functionality, making it a dependable workhorse for farm owners and operators. The 1390 is a testament to Case IH's legacy of producing quality agricultural machinery. This factory service repair manual provides comprehensive guidance for the service and repair of the Case IH 1390 tractor. It covers all major systems, including the engine, transmission, hydraulics, electrical components, drivetrain, braking, steering, fuel, and cooling systems, as well as the operator's station and chassis. The manual details routine maintenance, troubleshooting procedures, overhaul instructions, component replacement, and adjustment procedures, offering factory-level repair information. Its extensive coverage ensures that owners, mechanics, and service technicians have the necessary resources to maintain and repair the tractor effectively, ensuring its longevity and optimal performance.