This manual pertains to the Clark SM-520R GCS/GCS Forklift, a robust piece of industrial equipment designed for demanding operational environments. While specific production years are not detailed, the engineering quality and reliability inherent in Clark forklifts ensure efficient and dependable performance in various material handling applications. The SM-520R is built to meet the rigorous standards expected in warehouse, manufacturing, and logistics settings, offering a powerful and versatile solution for lifting and transporting heavy loads. The purpose of this Service Repair Overhaul Manual is to provide comprehensive guidance for the maintenance, repair, and overhaul of the Clark SM-520R GCS/GCS Forklift. It covers essential areas including general information, detailed specifications, assembly and disassembly procedures, and wiring diagrams for systems such as the fuel, electrical, brakes, steering, hydraulic, wheels and tires, chassis, and uprights. This manual is an indispensable resource for owners, technicians, and mechanics, enabling them to perform necessary upkeep and repairs to ensure the continued optimal performance and longevity of the forklift.