This manual covers the JOHN DEERE 340 CYCLONE, produced between 1972 and 1977. This model represents robust engineering designed for demanding applications, emphasizing reliability and operational efficiency. Its construction is intended to provide dependable performance across various tasks, reflecting a commitment to quality in its design and functionality. The purpose of this comprehensive service repair manual is to provide detailed information for the maintenance, troubleshooting, and repair of the JOHN DEERE 340 CYCLONE. It includes extensive coverage of general maintenance, engine service, transmission, brake systems, electrical and wiring diagrams, suspension, lubrication, steering, cooling, fuel systems, and chassis/body components. This manual serves as an essential resource for owners, mechanics, and technicians, offering the technical data and procedures necessary to keep the equipment in optimal working condition.