The Hyundai HL757-9 and HL757TM-9 wheel loaders, manufactured by Hyundai Heavy Industries, are robust pieces of heavy equipment engineered for demanding material handling, loading, excavation, and construction tasks. These machines are designed with a focus on reliability and performance, featuring a powerful Cummins QSB6.7 diesel engine that delivers 170 HP and a displacement of 6.7 liters. The transmission is an Automatic Powershift, coupled with a 4WD drive system, ensuring efficient power delivery and traction across various job sites. With substantial dimensions, including a length of 7380 mm and a weight of 17,500 kg, these wheel loaders are built to handle significant workloads. This comprehensive service manual provides essential information for the operation, maintenance, and repair of the Hyundai HL757-9 / HL757TM-9 wheel loaders. It covers critical areas such as detailed maintenance procedures, troubleshooting guides for common issues, and technical specifications for key components including the engine and transmission. Safety guidelines are also included to ensure safe operation and servicing. This manual is an indispensable resource for owners, operators, and service technicians, enabling them to maintain the optimal performance and longevity of their Hyundai heavy equipment.