This manual pertains to the Bobcat 553 Skid Steer Loader, a versatile machine designed for various operational tasks. Engineered for reliability and performance, the 553 Skid Steer Loader features a hydrostatic drivetrain with continuously variable transmission, ensuring efficient power delivery and precise control. Its robust construction and adaptable design make it a dependable choice for demanding work environments. This document serves as a comprehensive Wiring, Hydraulic, and Hydrostatic Schematic manual in English, covering serial numbers 553 (S/N 539111001 AND ABOVE), 553 (S/N 539411001 AND ABOVE), 553 (S/N 520311001 AND ABOVE), and 553 (S/N 520411001 AND ABOVE). It provides detailed schematics for the electrical, hydraulic, and hydrostatic systems, offering essential guidance for operating and repairing the machine. The manual includes high-quality images and is fully printable, designed to assist owners, mechanics, and technicians in maintaining and troubleshooting the vehicle.