This comprehensive service repair manual provides detailed instructions and illustrations for maintaining and repairing your Allis Chalmers D-21, D-21 Series II, 210, and 220 tractors. It is designed for both experienced mechanics and do-it-yourself enthusiasts, guiding you through every step of the process. The manual covers a wide range of topics, including the brakes, clutch, cooling system, diesel fuel system, differential, electrical system, engine, final drive and differential, front system (without front wheel assist), front wheel assist, power lift system, power steering, power take-off, transmission (front), and transmission (dual range). With its thorough explanations and numerous visuals, this manual empowers you to keep your tractor operating at peak performance.

The Allis-Chalmers D-21, D-21 Series II, 210, and 220 tractors were a line of versatile agricultural machines produced by Allis-Chalmers from the late 1950s to the early 1970s. These tractors were known for their robust construction, powerful engines, and user-friendly design, making them popular choices for a wide range of farming tasks. They were available in both standard and wide-front configurations, providing flexibility for different field conditions and implement sizes. The D-21 and its later iterations were powered by a range of Allis-Chalmers diesel engines, providing ample power for plowing, cultivating, harvesting, and other demanding agricultural chores. These tractors were designed with ease of maintenance in mind, with readily accessible components and comprehensive service manuals available for both the home mechanic and professional technicians. The D-21 series incorporated various features that enhanced its practicality and user experience. The standard model offered a three-point hitch system for attaching implements, while the wide-front models provided increased stability and traction for heavier tasks. The power steering system, available as an optional feature, significantly reduced operator fatigue during long hours of operation. The tractors also featured a robust transmission system with multiple gear ratios, offering excellent control over speed and torque for optimal efficiency in different working conditions. The D-21 series tractors were known for their reliability and durability, making them valuable assets for farmers across the globe. Their ease of maintenance, coupled with their powerful performance, ensured that these tractors remained popular choices for decades, even after Allis-Chalmers ceased production.