This workshop service manual provides comprehensive coverage for the Allis-Chalmers Model 220 tractor. Known for its robust construction and farm utility, the Model 220 represents a significant part of Allis-Chalmers' legacy in agricultural machinery. While specific production years are not detailed, tractors of this type were typically manufactured in the 1960s and 1970s, embodying the brand's commitment to reliability and practical engineering. This manual is designed to assist owners, mechanics, and enthusiasts in maintaining and repairing this dependable piece of equipment. The purpose of this manual is to offer detailed guidance on all aspects of service and repair for the Allis-Chalmers Model 220. It covers essential maintenance procedures, including lubrication schedules and fluid checks, as well as in-depth troubleshooting guides for common and uncommon issues. The manual provides step-by-step instructions for the disassembly and assembly of all major systems, such as the engine, transmission, hydraulic, electrical, brake, and steering systems. Technical specifications, wiring diagrams, and rebuild instructions are also included, empowering users to perform repairs and upkeep with confidence and efficiency.