This manual covers the Ford New Holland S Series and 40 Series tractors, primarily produced in the late 1980s and throughout the 1990s. These robust agricultural machines, including models such as the 5640, 6640, 7740, 7840, 8240, and 8340 within the S Series, and the 4640, 4840, and 5040 in the 40 Series, are built upon Ford's strong legacy of reliable and practical farm equipment. Known for their durability and capability in demanding agricultural tasks, these tractors represent a significant period in the evolution of the Ford tractor division before its integration into the New Holland brand. They are equipped with diesel engines designed for powerful torque delivery and are available with various transmission options, including powershift capabilities, to enhance operational efficiency.

This comprehensive factory service and repair workshop manual provides in-depth technical information essential for maintaining and repairing your Ford New Holland S Series or 40 Series tractor. It details engine overhaul, fuel, cooling, lubrication, transmission, hydraulic, electrical, braking, steering, and chassis systems, alongside operator station components. The manual includes routine maintenance schedules, detailed troubleshooting guides, component repair and rebuild instructions, diagnostic procedures, and adjustment specifications. With factory-level detail, precise torque values, and clear schematics and diagrams, this manual is an indispensable resource for farm owners, agricultural mechanics, and service technicians seeking to perform professional-level maintenance and repairs.