The Allis-Chalmers B-12 Tractor, a notable member of the B-Series lineage, represents a significant offering from a prominent American manufacturer known for its agricultural and industrial equipment. While specific production years are not detailed, this tractor embodies the versatility and reliability characteristic of its era. Designed for a range of applications, the B-12 is built with engineering quality intended to provide dependable service. Its robust construction and functional design underscore Allis-Chalmers' legacy in providing practical machinery for demanding tasks. This comprehensive Factory Service Repair Manual provides essential information for the maintenance, repair, and restoration of all B-12 Tractor styles. Covering critical systems including the engine, hydrostatic drive unit, power train, and electrical systems, this manual offers step-by-step repair instructions, routine maintenance procedures, and advanced troubleshooting guides. With hundreds of pages of official factory information, including detailed diagrams, torque specifications, and a parts catalog, this manual is an indispensable resource for Allis-Chalmers B-12 Tractor owners and technicians seeking to maintain optimal performance and longevity.