The Hyundai Heavy Industry HL780-3A Wheel Loader is engineered for demanding operational environments, combining robust construction with advanced hydraulic and powertrain systems. This model features a powerful Cummins QSB6.7 turbocharged diesel engine, delivering substantial horsepower and torque for efficient material handling. Its design prioritizes reliability and performance, with a substantial operating weight and bucket capacity, making it a versatile machine for construction, mining, and other heavy-duty applications. The automatic power shift transmission ensures smooth operation and optimal productivity across various tasks. This Service Repair Manual provides comprehensive guidance for the maintenance, repair, and technical understanding of the Hyundai Wheel Loader HL780-3A. It covers essential areas including detailed engine specifications, transmission system information, fluid capacities, and operational parameters. Owners, technicians, and mechanics will find detailed procedures and technical data necessary to ensure the longevity, efficiency, and optimal performance of their equipment. The manual is designed to be an authoritative resource for all service-related needs.