This manual pertains to the Hyundai HL757-7A Wheel Loader, designed for general operation and maintenance. The HL757-7A represents robust engineering, built for reliability in demanding work environments. Its comprehensive design includes key components such as the cab, engine, power train system, and hydraulic system, all contributing to its efficient performance. This operating manual is intended for a wide range of users, from first-time owners to professional technicians, ensuring that everyone can safely and effectively utilize the capabilities of this advanced machinery. The purpose of this operating manual is to provide detailed guidance for the safe and efficient use, maintenance, and troubleshooting of the Hyundai HL757-7A Wheel Loader. It covers essential operational guidelines, including pre-operation checks, engine starting and stopping procedures, and methods for operating the working device and traveling. Furthermore, the manual offers crucial maintenance information, featuring a maintenance schedule, service instructions, and specifications for fuels and lubricants, all aimed at preventing premature failure and reducing repair costs. Troubleshooting sections address common issues within the engine, electrical, power train, and hydraulic systems, empowering users to maintain peak operational status.