This manual covers the Nissan Forklift Internal Combustion F04 Series, designed for robust industrial applications. It encompasses detailed service and repair procedures for the F04 Series forklift, along with specific engine variants including the Gas/LPG TB45, Gas/LPG GM 4.3L, and the Diesel S6S. This comprehensive documentation ensures that users can effectively maintain, service, diagnose, and repair their equipment, leveraging step-by-step instructions and detailed diagrams for efficient and accurate work. The purpose of this manual is to provide a complete resource for the Nissan Forklift Internal Combustion F04 Series and its associated engines. It details essential maintenance and repair procedures, covering all aspects from general information and electrical systems to powertrain, braking, steering, and hydraulic systems. Furthermore, it includes in-depth coverage for each engine type, addressing tune-ups, mechanical components, fuel and lubrication systems, and electrical diagnostics. This guide is intended for owners, mechanics, and technicians to ensure optimal performance and longevity of the forklift.