This manual covers the Case 621F and 721F Tier 4 models. These machines are engineered for demanding applications, featuring robust construction and reliable Tier 4 diesel engines. The integration of a Powershift transmission ensures efficient power delivery and operational flexibility across various tasks. Their design prioritizes durability and performance, making them suitable for heavy-duty industrial and construction environments. This English-language manual serves as a comprehensive guide for operating and maintaining your Case equipment. It details essential information, including safety guidelines, instrument and control functions, operating procedures for transport and work, and maintenance schedules. Technical specifications, fluid capacities, and accessory information are also provided. The manual's structure, with its detailed index and searchable text, is designed to assist owners and technicians in ensuring optimal performance and longevity of the equipment.