This manual covers the Bobcat 553 Skid Steer Loader, serial numbers 520411001 and above. Engineered for demanding work environments, the Bobcat 553 is renowned for its robust construction, reliable performance, and versatile capabilities. Its compact design allows for operation in tight spaces, making it an ideal choice for construction, landscaping, and agricultural applications. This service repair manual provides comprehensive information to ensure the continued optimal operation of your equipment. The purpose of this manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of the Bobcat 553 Skid Steer Loader. It includes essential sections on preventive maintenance, engine service, hydraulic systems, hydrostatic and drive systems, electrical systems, and overall systems analysis. With extensive technical specifications, diagrams, charts, and safety instructions, this manual serves as an indispensable resource for owners, mechanics, and technicians seeking to maintain and repair the vehicle effectively and efficiently.