The Cockshutt 30 Tractor, produced primarily between 1951 and 1958 in Brantford, Ontario, Canada, represents a robust piece of agricultural machinery. Designed to compete with other prominent brands of its era, this tractor was engineered for reliability and performance in demanding farm work. Featuring a typically 4-cylinder gasoline or diesel engine, often based on Hercules or Continental designs, and a manual transmission, the 30 Tractor offered approximately 30-40 PTO horsepower, making it a versatile workhorse for various farming operations. Its solid construction and straightforward mechanical design have contributed to its enduring presence in the agricultural sector. This workshop service manual provides comprehensive guidance for the repair, maintenance, and troubleshooting of the Cockshutt 30 Tractor. It covers all major systems, including the engine, transmission, fuel, electrical, hydraulic, cooling, steering, brakes, clutch, and power take-off. Detailed procedures for overhaul, adjustments, and diagnostics are included, along with maintenance schedules, fluid specifications, and troubleshooting charts. This manual is an essential resource for professional technicians, DIY mechanics, and farm equipment owners seeking to maintain and repair their tractor, ensuring its continued operational efficiency and longevity.