The International Harvester 454 Tractor, produced in the early to mid-1970s, represents a robust and reliable piece of agricultural machinery from a manufacturer renowned for its durable products. This versatile utility tractor, powered by a diesel engine typically around 3.87 liters and delivering approximately 55-60 PTO horsepower, was designed for efficiency and dependable performance in demanding farm environments. Its engineering reflects the legacy of International Harvester, emphasizing longevity and straightforward functionality. Key features include a manual gearbox with multiple speeds, a mechanical PTO engagement, and a basic analog operator interface for essential monitoring, all contributing to its reputation as a workhorse in its class. This comprehensive service and repair manual provides detailed instructions for the maintenance, troubleshooting, and repair of the International Harvester 454 Tractor. It covers a wide array of systems, including the engine, transmission, brakes, cooling system, fuel system, electrical system, and chassis. The manual offers step-by-step guidance for disassembly, reassembly, servicing, and diagnostics, making it an invaluable resource for tractor owners, DIY enthusiasts, farm technicians, and mechanics. By utilizing this manual, users can gain an in-depth understanding of their tractor, perform necessary upkeep, and ensure optimal operational performance, ultimately saving time and money on repairs.