This manual covers the Hyundai HL780-9A Wheel Loader, a robust piece of heavy equipment designed for demanding operational tasks. Engineered for reliability and performance, the HL780-9A represents a significant advancement in its class, offering advanced features and superior build quality to meet the rigorous requirements of various industries. Its design prioritizes efficiency and durability, making it an ideal choice for construction, material handling, and other heavy-duty applications where dependable operation is paramount. The purpose of this factory service repair manual is to provide comprehensive guidance for the maintenance and repair of the Hyundai HL780-9A Wheel Loader. It details essential information across numerous sections, including general safety, engine systems, power train, brake system, steering system, work equipment, and electrical system. Within these sections, owners and mechanics will find in-depth explanations of structure and function, operational checks, troubleshooting procedures, and disassembly and assembly instructions. This manual is an indispensable resource for ensuring the longevity and optimal performance of your equipment.