This manual covers the Hyundai HDF15-3 and HDF18-3 Forklift Trucks, designed for robust material handling applications. Built by Hyundai Heavy Industries, these models are engineered for reliability and efficiency in demanding industrial environments. The HDF15-3 offers a lift capacity of approximately 15,000 lbs, while the HDF18-3 supports up to 18,000 lbs, providing substantial operational capabilities. Their design emphasizes durability and performance, making them valuable assets for various logistical and warehousing operations. This comprehensive service and repair manual provides detailed information for owners, operators, maintenance personnel, and technicians. It includes essential sections on general information, safety hints, periodic replacement schedules, and specifications. In-depth coverage extends to major components, power train, brake system, steering system, hydraulic system, electric system, and mast system, with detailed troubleshooting, test, adjustment, disassembly, and assembly procedures for each. High-resolution diagrams and step-by-step instructions are provided to facilitate accurate maintenance and repair, ensuring the optimal performance and longevity of your Hyundai forklift.