This Workshop Service Repair Manual provides comprehensive technical information for the Hyundai HL780-3A Wheel Loader. Engineered for demanding operational environments, this machine represents a commitment to robust performance and reliability. Its design focuses on delivering efficiency and durability, making it a trusted choice for various service and repair applications. The manual is presented in English and features top-quality diagrams and step-by-step instructions to facilitate a thorough understanding of the equipment. The purpose of this manual is to serve as an essential resource for maintaining and repairing the Hyundai HL780-3A Wheel Loader. It covers detailed procedures for the hydraulic system, electrical system, and mechatronics system, including component location, circuit diagrams, and system overviews. Scheduled maintenance recommendations are provided to ensure peak operating condition and compensate for initial wear. Furthermore, the manual includes troubleshooting guidance for common issues across these systems, along with disassembly and assembly procedures for major components, ensuring that owners, mechanics, and technicians have the necessary information to keep the machine in optimal working order.