The Cockshutt 550 Tractor, produced in the mid-to-late 1950s, represents a significant period in agricultural machinery development. Manufactured primarily in Brantford, Ontario, Canada, Cockshutt was a respected brand known for robust and straightforward engineering. The 550 model embodies this heritage, offering durability and reliable performance suitable for a variety of farm tasks. Its design, common for tractors of its era, likely features a diesel engine, manual transmission, and essential operational controls, making it a workhorse for farm owners and restoration enthusiasts alike. This comprehensive English-language service manual provides full repair and maintenance coverage for the Cockshutt 550 Tractor. It details procedures for engine, transmission, hydraulic, electrical, and chassis systems, including engine repair, overhaul, diagnostics, and rebuilds. The manual also covers scheduled maintenance, troubleshooting common issues, and technical adjustments. With professional technician-level information, detailed illustrations, wiring diagrams, and safety precautions, this manual is an invaluable resource for mechanics, agricultural technicians, and farm owners seeking to maintain and repair their tractor efficiently and cost-effectively.