This manual covers the Hyundai HDF 15-III and HDF 18-III Forklift Trucks. These robust machines are engineered for reliable performance in demanding industrial environments, offering capacities of approximately 1.5 and 1.8 tons respectively. Built with quality and durability in mind, they are designed to meet the operational needs of various material handling applications. The HDF series represents Hyundai's commitment to providing efficient and dependable equipment for businesses requiring consistent material movement solutions. This comprehensive workshop service repair manual provides detailed information essential for the maintenance and repair of your Hyundai HDF 15-III and HDF 18-III Forklift Trucks. It covers a wide array of systems, including general information, safety precautions, technical specifications, periodic maintenance schedules, lubrication charts, and specialized tools. Detailed procedures for structure removal and installation, powertrain, braking, steering, and hydraulic systems are included, alongside in-depth coverage of mast assemblies and electrical components. Troubleshooting guides, hydraulic circuit diagrams, and electrical wiring diagrams are also provided to assist technicians and owners in diagnosing and resolving issues efficiently, ensuring optimal vehicle performance and longevity.