This technical service manual covers John Deere 840, 940, 1040, and 1140 series tractors, likely produced in the late 1970s through the 1980s. These compact utility tractors are known for their robust build, reliable diesel engines, and versatility for agricultural and specialized applications. They offer good maneuverability and strong low-end torque, making them capable workhorses. The manual provides comprehensive information for maintaining and repairing these durable machines, reflecting John Deere's long heritage in agricultural machinery.

This manual serves as an essential resource for owners, mechanics, and technicians, detailing a wide range of systems including the engine, fuel, cooling, lubrication, clutch, transmission, rear axle, hydraulics, steering, brakes, electrical systems, and operator station. It includes step-by-step procedures for assembly, disassembly, maintenance, component rebuilds, adjustments, and troubleshooting, alongside essential technical data, wiring diagrams, and special tool requirements. With an estimated over 500 pages of content, this English-language manual is designed to facilitate the upkeep and repair of your John Deere tractor, ensuring its continued performance and longevity.