This workshop service manual covers the Leyland 344 and 384 tractor models, produced primarily in the 1960s and 1970s. These tractors, part of Leyland's robust '300 series,' are known for their practicality in agricultural applications. The 344 typically offers around 50-60 horsepower, while the 384 provides approximately 70-80 horsepower, both powered by a Leyland 4-cylinder diesel engine. These models feature a manual gearbox, typically with a single dry plate clutch, and may include options like a differential lock. The Leyland 344 and 384 tractors represent a significant heritage in British agricultural machinery manufacturing. This comprehensive 184-page English-language manual is designed to assist mechanics, farm owners, and service technicians in maintaining and repairing these Leyland tractors. It provides detailed, step-by-step instructions for a wide range of systems, including the engine, fuel, cooling, lubrication, transmission, hydraulic, power-take-off, steering, braking, and electrical systems. The manual covers general maintenance, systematic troubleshooting, disassembly and assembly procedures, repair and rebuild guidance, adjustments, and testing and inspection methods. It also includes information on special tools, service data, torque values, and detailed illustrations to ensure clarity and facilitate satisfactory after-sales service.