This manual covers the Case 821F and 921F Tier 4 Wheel Loaders. These machines are engineered for robust performance and reliability in demanding work environments, featuring Tier 4 compliant diesel engines, Powershift transmissions, and heavy-duty planetary hub axles. Their design emphasizes operator comfort and efficiency through features like articulated frame steering and a comfortable, ergonomic cabin, ensuring productivity and durability for a wide range of applications. The purpose of this comprehensive Factory Service Workshop Manual is to provide detailed information for the maintenance, repair, and troubleshooting of your Case 821F and 921F Wheel Loaders. It includes sections on general information, engine, electrical systems, drive train, hydraulics, and operator station, supported by clear instructions, detailed illustrations, exploded diagrams, drawings, and photos. This manual is an essential resource for owners, technicians, and mechanics to ensure the optimal performance and longevity of these powerful machines.