This Parts Manual covers the 521T Wheel Loader, serial numbers ranging from 312000079 to 3120100041. The 521T is engineered for robust performance and reliability, featuring advanced hydraulic systems, a hydrostatic transmission, and a well-appointed operator station designed for efficiency and comfort. Its construction and componentry are built to withstand demanding operational environments, making it a dependable choice for various industrial and construction applications. This comprehensive English-language Parts Manual is designed to assist users in identifying and ordering replacement parts for the 521T Wheel Loader. It details numerous systems, including the engine, transmission, hydraulic system, steering, electrical components, operator station, and various attachments. The manual provides detailed information on service procedures, disassembly and assembly, and repair checks, ensuring that owners and technicians have the necessary resources to maintain the vehicle's optimal performance and longevity.