This comprehensive service repair manual for the Allis Chalmers Model 210, 220, and D21 tractors provides detailed instructions and diagrams for all aspects of maintenance, repair, and troubleshooting. It is designed for both experienced mechanics and DIY enthusiasts, offering step-by-step guidance to ensure repairs are completed correctly and efficiently.

The manual covers every component of the tractor in depth, including engine, transmission, hydraulics, electrical system, and more. You'll find detailed instructions on tasks like:

- Engine disassembly and reassembly
- Transmission repair and adjustment
- Hydraulic system troubleshooting and repair
- Electrical system diagnosis and repair
- Routine maintenance procedures

This manual is a valuable resource for anyone who owns or works on these Allis Chalmers tractors. It can help you save money on repairs by enabling you to diagnose and fix problems yourself, and it can also enhance your understanding of the tractor's operation and maintenance. With clear language and high-quality illustrations, this manual makes it easy to understand and perform even the most complex repairs.

The Allis-Chalmers Model 210, 220, and D21 tractors were a line of versatile agricultural workhorses produced by Allis-Chalmers Manufacturing Company in the mid-20th century. These tractors were known for their rugged construction, reliable performance, and adaptability to a wide range of farm tasks. The Model 210 was the base model, featuring a 4-cylinder gasoline engine and a 3-point hitch. The Model 220 offered more power with a larger displacement gasoline engine, while the D21 was a diesel-powered version, providing even greater torque and fuel efficiency for demanding applications. These tractors were offered in various configurations, including standard, wide-front, and row-crop versions, allowing farmers to customize their machine for their specific needs.

The Allis-Chalmers 210, 220, and D21 tractors featured several innovative design elements for their time. The "Live PTO" system allowed for independent operation of the power take-off shaft, enabling implements to be engaged and disengaged without stopping the tractor engine. These tractors also employed a "Live Hydraulic" system, providing power for implements and steering, simplifying operation and enhancing productivity. The use of a "Constant Mesh Transmission" with 6 forward and 2 reverse gears provided smooth and efficient power delivery. These features, combined with their robust construction, made the 210, 220, and D21 tractors popular among farmers and agricultural businesses, solidifying Allis-Chalmers' reputation for reliable and efficient machinery.