This Factory Service Repair Manual provides comprehensive information for the Hyundai HL780-9S Wheel Loader. Engineered for demanding heavy equipment applications, this model represents a commitment to robust construction and operational efficiency. Its design focuses on delivering reliable performance across a variety of service and repair tasks, ensuring that users have access to the capabilities needed for challenging work environments. The purpose of this manual is to serve as an indispensable resource for maintaining and repairing the Hyundai HL780-9S. It covers essential areas including safety guidelines, detailed specifications, engine operation, power train, brake, steering, work equipment, and electrical systems. With thorough explanations of structure, function, troubleshooting, and disassembly/assembly procedures, this English-language guide empowers owners, mechanics, and technicians to ensure the longevity and optimal performance of their equipment.