The Deutz Fahr Agrostar 6.21 is a robust tractor, part of a well-regarded series produced primarily in the 1990s by the established German manufacturer Deutz Fahr. Known for its reliable engineering and performance in demanding agricultural environments, this tractor likely features a powerful Deutz diesel engine, manual or powershift transmission, and essential safety systems such as ROPS and hydraulically operated brakes. The Agrostar series represented advancements in its era, offering a blend of comfort and capability for various farm operations. This comprehensive English-language manual serves as an indispensable resource for owners, DIY mechanics, and service technicians. It combines detailed parts catalog information with in-depth service procedures, covering all major systems including the engine, drivetrain, chassis, electrical, and hydraulic systems. With detailed parts explosions, original part numbers, and step-by-step guidance for disassembly, rebuilding, and troubleshooting, this manual empowers users to maintain and repair their Agrostar 6.21 effectively, ensuring its longevity and optimal performance.