This manual covers the Allis Chalmers B-112 Tractor, an agricultural workhorse from a manufacturer with a rich history in American industrial and agricultural equipment. Designed for a variety of tasks, this tractor represents a generation of reliable and capable machinery. Its robust engineering and straightforward design have made it a valued asset for owners seeking dependable performance. This comprehensive guide aims to preserve that legacy by providing the necessary information for its upkeep and repair. This Service Repair Workshop Manual in English provides detailed coverage of the Allis Chalmers B-112 Tractor, encompassing service, repair, troubleshooting, and diagnostics. It includes critical sections such as technical specifications, engine service, hydrostatic drive unit and power train details, wiring diagrams, B-Series attachments, and a parts catalog. The manual is designed to assist owners with basic mechanical skills and independent professionals in maintaining and repairing the tractor, offering clear, accurate, and concise instructions, often with illustrations, to ensure safe and efficient operation and to save on maintenance costs.