The Case IH 1255 / 1455 Tractor series represents a robust line of agricultural machinery, built upon a heritage of reliable engineering. These tractors, produced from the late 1980s into the 1990s, were designed as powerful workhorses for demanding farm applications, offering approximately 125 to 145 PTO horsepower respectively. They feature durable diesel engines, often equipped with turbochargers for enhanced performance, and are typically paired with sophisticated transmission systems, including powershift options for on-the-go gear changes. Known for their solid construction and operational efficiency, these models have earned a reputation for durability and are a testament to Case IH's commitment to providing dependable agricultural solutions. This comprehensive Service Repair Workshop Manual provides detailed technical information essential for the maintenance and repair of the Case IH 1255 / 1455 Tractor. It covers a wide array of systems, including the engine, fuel system, electrical equipment, hydraulics, and chassis components, offering step-by-step instructions for disassembly, reassembly, and rebuilding procedures. The manual includes crucial diagnostic flowcharts, troubleshooting guides, specific torque values, clearances, and tolerances, along with detailed wiring schematics and special tool identification. This resource is designed to empower independent service professionals, farm owners, and Case IH dealerships with the precise, vehicle-specific data needed to ensure optimal performance and longevity of these powerful tractors.