This manual covers the Nissan Forklift Internal Combustion 1F4 Series, a robust and reliable series of forklifts designed for a wide range of industrial material handling applications. Engineered for durability and efficient operation, these models are built to meet the demanding needs of various work environments. The 1F4 Series represents Nissan's commitment to quality manufacturing, offering powerful performance and dependable service for businesses requiring consistent material movement solutions. This comprehensive service and repair manual provides detailed instructions and technical specifications essential for the maintenance and repair of the Nissan Forklift Internal Combustion 1F4 Series, including specific coverage for the TB45 Gas/LPG and TD42 Diesel engines. It is intended for both experienced technicians and do-it-yourself owners, offering step-by-step guidance, diagrams, and troubleshooting information across all major vehicle systems, from the engine and transmission to the hydraulic and electrical systems, ensuring the longevity and optimal performance of your forklift.