The Allis-Chalmers B-112 Tractor represents a robust and versatile machine, built with the engineering quality and reliability that defined the brand's agricultural and industrial equipment. Known for its utility and durability, the B-112, along with its B-Series attachments, was designed to meet the demanding needs of its era. This model embodies the legacy of Allis-Chalmers in providing dependable machinery for various tasks, emphasizing practical design and operational efficiency. This comprehensive factory service repair manual provides in-depth coverage for the Allis-Chalmers B-112 Tractor and its associated B-Series Attachments. It serves as an essential resource for owners, mechanics, and restoration enthusiasts, detailing engine systems, drivetrain, and electrical components. The manual includes scheduled maintenance procedures, advanced troubleshooting guides, step-by-step repair instructions, and complete rebuilding guidance, all presented with factory-level detail, illustrations, and diagrams to ensure accurate and effective maintenance and repair.