This manual covers the Case IH 2390, 2394, 2590, and 2594 agricultural tractors, models that represent a robust lineage of heavy-duty equipment. These tractors, typically produced in the late 1980s to early 1990s, are known for their dependable performance in demanding agricultural environments. Engineered with a focus on durability and operational efficiency, these Case IH machines are built to provide reliable service for years. This documentation serves as an essential resource for understanding and maintaining the sophisticated systems that contribute to their renowned performance and longevity in agricultural applications. The purpose of this comprehensive service repair manual is to provide detailed information for the maintenance and repair of your Case IH tractor. It covers a wide array of critical systems, including the Hydraulic System, Hydrostatic Service, Electrical System, Engine Service, Drive System, Cooling System, and Heating, Ventilation, and Air Conditioning (HVAC). Within its extensive pages, you will find step-by-step repair procedures, clutch and drive chain adjustments, troubleshooting guides, and essential technical specifications. This manual is designed for owners, operators, and service technicians, offering the knowledge needed to perform maintenance and repairs effectively, ensuring optimal performance and significant cost savings.