This manual covers the Nissan Forklift Internal Combustion 1F5 Series, designed for robust industrial applications. It details the engineering and reliability inherent in this series, providing comprehensive information for maintaining its operational efficiency. The manual is intended for both those performing their own maintenance and experienced technicians, offering a thorough guide to the forklift's systems. The scope of this service manual is extensive, encompassing detailed procedures for maintenance, repair, and troubleshooting across numerous vehicle components. It includes specific sections on engine service for both Gas/LPG TB42 and Diesel S6S models, as well as the automatic transmissions, differential carrier, drive axle, steering axle, brake system, and hydraulic system, among others. This manual serves as an essential resource for ensuring the longevity and optimal performance of your Nissan Forklift.