This manual covers the Nissan Forklift Internal Combustion 1F4 Series, including specific guidance for the TB45 Gas/LPG and TD42 Diesel engines. Engineered for demanding industrial applications, the 1F4 Series forklifts are designed for robust performance and reliability in various operational environments. This comprehensive documentation ensures that users have access to the detailed information necessary to maintain these powerful machines. The purpose of this manual is to provide thorough maintenance and repair procedures for the Nissan Forklift Internal Combustion 1F4 Series and its associated engines. It offers step-by-step instructions, detailed diagrams, and technical specifications to assist owners, mechanics, and technicians in diagnosing, servicing, and repairing the forklift. Key areas covered include general information, engine mechanics, transmission, braking, steering, hydraulic systems, and electrical components, enabling efficient and correct upkeep.