This manual covers the Nissan Forklift Internal Combustion 1F4 Series, designed for robust industrial applications. It details the engineering and reliability expected from Nissan Forklift products, ensuring efficient operation in demanding environments. The comprehensive nature of this documentation reflects the commitment to providing users with thorough information for optimal performance. The purpose of this service manual is to guide owners and technicians through all aspects of maintenance and repair for the Nissan Forklift Internal Combustion 1F4 Series, including its associated Gas/LPG TB45 and Diesel TD42 engines. It provides detailed procedures, technical specifications, and troubleshooting guidance for all major systems, from the engine and transmission to the hydraulic and electrical systems, ensuring the vehicle remains in peak working condition.