This manual covers the Hyundai Forklift Truck 15L/18L/20L(G)-7A Series, including models 15L-7A, 15LG-7A, 18L-7A, 18LG-7A, 20LG-7A, and 20L-7A. These compact to mid-size internal combustion engine forklifts are designed for efficient material handling, offering lifting capacities ranging from 1500kg to 2000kg. Known for Hyundai's reputation in heavy equipment manufacturing, these forklifts are built with robust engineering for reliability in industrial environments. The '-7A' designation signifies a specific generation of these reliable machines, often featuring LPG or Diesel fuel options for versatility. This comprehensive Service Repair Manual provides in-depth information essential for the maintenance, repair, and diagnostics of your Hyundai forklift. It covers all major systems, including the engine, transmission, brake system, steering system, hydraulic system, electric system, and mast system. Detailed procedures for periodic maintenance, operational checks, adjustments, removal and installation of units, and component disassembly and assembly are included. Furthermore, advanced troubleshooting guides and detailed electrical circuit diagrams are provided to assist technicians and owner-operators in maintaining optimal performance and longevity of the equipment.