This manual provides comprehensive service and repair information for Mitsubishi FG40K, FG40KL, FG45K, and FG50K forklift trucks. These robust machines, designed for demanding material handling operations, offer capacities ranging from 4000 kg to 5000 kg. They are equipped with reliable engine options, including the Nissan TB45 Gasoline and the GM 4.3L (G6) Gasoline, and feature advanced systems such as power shift transmissions and sophisticated hydraulic controls. The engineering quality of these forklifts ensures durability and efficiency in various industrial environments. This Service Repair Workshop Manual is an essential resource for owners and technicians. It covers all critical aspects of maintenance and repair, including detailed procedures for scheduled maintenance, tune-ups, fluid changes, and component overhauls. The manual includes extensive troubleshooting guides, diagnostic information for engine, electrical, and hydraulic systems, and step-by-step instructions for component removal, installation, and adjustments. With clear text and high-quality diagrams, this manual empowers users to perform repairs confidently, ensuring the longevity and optimal performance of their Mitsubishi forklift trucks.