This document pertains to the Hyundai HL770-7A, a robust piece of machinery designed for demanding operational environments. Engineered for reliability and performance, this model represents a significant advancement in its class, incorporating advanced diesel engine technology and a sophisticated Powershift transmission. Its construction emphasizes durability and efficiency, making it a dependable choice for various industrial and construction applications. This comprehensive service and repair manual provides detailed information essential for the maintenance and upkeep of the Hyundai HL770-7A. It covers critical systems including the powertrain, brake system, steering system, and work equipment, offering guidance on structure, function, checks, troubleshooting, testing, adjustments, and disassembly/assembly procedures. Additionally, the manual includes vital safety guidelines and information on the electrical system, such as component locations and circuit diagrams, ensuring that owners and technicians have the resources needed for optimal vehicle operation and longevity.