This manual pertains to the Bobcat 553 AF Series Skid Steer Loader, identified by serial numbers 520311001 and above. Engineered for demanding work environments, this model exemplifies Bobcat's commitment to robust construction and reliable performance. Its hydrostatic transmission and 4-wheel drive system provide excellent maneuverability and power for a wide range of tasks, making it a versatile tool for construction, landscaping, and agricultural applications. The intuitive hand and foot controls ensure efficient operation, allowing users to tackle challenging jobs with confidence. The purpose of this Parts Manual is to provide comprehensive information for identifying and ordering components for the Bobcat 553 AF Series Skid Steer Loader. It details parts for critical systems including the engine, transmission, brakes, cooling system, exhaust, steering, suspension, and lighting. This manual is an essential resource for owners, maintenance personnel, and technicians, enabling them to accurately identify necessary parts and ensure the continued optimal performance and longevity of their equipment.