The 521 Wheel Loader is a robust and reliable piece of equipment designed for a variety of demanding tasks. Engineered for durability and performance, this model offers exceptional operational efficiency and a comfortable operator experience, making it a valuable asset for construction, landscaping, and material handling applications. Its thoughtful design ensures longevity and consistent output, reflecting a commitment to quality and innovation in the heavy machinery sector. This comprehensive Parts Manual, in English, covers the 521 Wheel Loader for serial numbers 302000162 to 312010012. It details numerous components and systems, including engine specifications, transmission parts, axles, hydraulics, electrical systems, brake systems, and operator station elements. The manual is intended to assist owners, mechanics, and technicians in identifying and ordering the correct parts, ensuring the continued optimal performance and maintenance of the vehicle.