This operating manual pertains to the Hyundai HL757-7A Wheel Loader. Designed for demanding operational environments, this equipment embodies robust engineering and reliability. Its intended use encompasses driving, handling, lubrication, maintenance, inspection, and adjustment, all aimed at promoting safety and enhancing machine performance. The HL757-7A is built to deliver exceptional efficiency and durability in various work applications, making it a valuable asset for any operation requiring heavy-duty material handling. This comprehensive manual serves as an essential guide for owners, operators, and technicians. It covers critical aspects including detailed operational procedures, from starting the engine to efficient working methods and storage. Furthermore, it provides in-depth maintenance instructions, covering tightening torques, fluid specifications, maintenance charts, and servicing of key systems like the electrical and air conditioning units. Safety guidelines for operation and maintenance are also thoroughly outlined, alongside troubleshooting procedures for common issues within the engine, electrical, power train, and hydraulic systems. Technical specifications and information on major components are also included to ensure optimal equipment upkeep and longevity.