This manual covers the Hyundai HBF15-3 and HBF18-3 Forklift Trucks, industrial equipment known for their robust construction and reliable performance in material handling applications. These models, produced by Hyundai Heavy Industries, represent a line of counterbalance forklifts designed for efficiency and durability. The HBF15-3 offers a 1.5-ton lifting capacity, while the HBF18-3 provides an 1.8-ton capacity, catering to varying operational demands. This comprehensive service repair manual is an essential resource for understanding, maintaining, and repairing these workhorses. The purpose of this manual is to provide detailed technical information and procedural guidance for owners, technicians, and mechanics. It encompasses a wide range of critical areas, including in-depth coverage of the powertrain, brake system, steering system, hydraulic system, mast, and electrical system. Users will find extensive information on structure, operation, periodic maintenance schedules, troubleshooting, disassembly, assembly, and repair operations. The manual is designed to facilitate self-maintenance and repairs, enabling users to effectively manage their equipment and minimize downtime through clear instructions, diagrams, and photographic illustrations.