The Case 621F & 721F Tier 4 Wheel Loaders represent robust construction equipment designed for demanding operational environments. These machines feature advanced Tier 4 compliant diesel engines, a load-sensing hydraulic system, and heavy-duty planetary drive axles, ensuring efficient power delivery and reliable performance. The hydrostatic power steering and Powershift transmission contribute to precise control and maneuverability, making them suitable for a wide range of industrial and construction applications. Their engineering prioritizes durability and operational excellence, offering a dependable solution for material handling needs. This comprehensive Factory Service Workshop Manual provides detailed information for the maintenance, service, and repair of the Case 621F & 721F Tier 4 Wheel Loaders. It covers essential systems including the diesel engine, Powershift transmission, four-wheel drive, heavy-duty axles, hydraulic system, and steering. The manual is presented in English and includes detailed diagrams, exploded views, drawings, photos, and schematics for both electrical and hydraulic systems, along with a special tool index. This resource is designed to assist owners, mechanics, and technicians in performing all necessary upkeep and repair procedures accurately and efficiently.