This Workshop Service Repair Manual covers the Komatsu FD & FG Series Forklift, applicable to a wide range of models including FG10/15/18-20, FG15H/18H-20, FD10/15/18-20, FG20/25/30-16, FG20H/25H/-16, FG20N/25N/30N-16, FG35A-16, FD20/25/30-16, FD20H/25H/30H-16, FD20N/25N/30N-16, and FD35A-16. These robust forklifts are engineered for efficient material handling in various industrial environments. This manual is designed to provide comprehensive information for the maintenance and repair of these versatile machines, ensuring their continued reliability and performance. This manual offers detailed, step-by-step instructions accompanied by illustrations and diagrams, covering everything from general information and specifications to complete disassembly and routine maintenance procedures. It includes in-depth coverage of gasoline and diesel engines, including the Nissan K15, K21, K25, and Komatsu 4D92E, 4D94LE, 4D98E engines, as well as all major systems such as the hydraulic, electrical, transmission, and braking systems. The purpose of this document is to empower both do-it-yourself owners and experienced mechanics to perform cost-effective maintenance and repairs, ensuring optimal operation and longevity of the Komatsu FD & FG Series Forklift.