The Hyundai HL780-3A Wheel Loader is engineered for demanding operational environments, combining robust construction with advanced functionality. Designed for efficiency and reliability, this model is a testament to Hyundai's commitment to producing high-quality heavy machinery. Its sophisticated design ensures optimal performance across a wide range of applications, making it an indispensable tool for construction, material handling, and other industrial tasks. This comprehensive service manual provides detailed information essential for the maintenance and repair of the Hyundai HL780-3A Wheel Loader. It covers critical areas including engine fault code information for the QSM11, power train, brake, steering, and work equipment systems, detailing their structure, function, troubleshooting, and repair procedures. Furthermore, the manual includes guidance on the electrical system and general operation, complete with safety hints, to ensure the vehicle remains in optimal working condition.