This comprehensive Allis Chalmers D-21, D-21 Series II, Two-Ten and Two-Twenty Tractor Shop Service Repair Manual provides detailed instructions for maintaining and servicing your equipment. It includes detailed diagrams, manufacturers’ specifications, and step-by-step instructions to guide you through various repair procedures. Navigate the manual easily with convenient chapter bookmarks and a robust search function that allows you to find the information you need quickly.

The manual covers a wide range of topics, including:

- Brakes
- Clutch
- Cooling System
- Diesel Fuel System
- Differential & Final Drive
- Electrical System
- Engine
- Final Drive
- Front System
- Power Lift System
- Power Steering
- Power Take-Off
- Service Data
- Steering System
- Transmission
- And Much More

This manual is an invaluable resource for performing tune-ups, routine maintenance, or more complex repairs. It’s packed with illustrations, exploded diagrams, drawings, and photos to clarify each step of the service repair process.

The Allis-Chalmers D-21 and D-21 Series II tractors, also known as the Two-Ten and Two-Twenty, were a line of versatile farm workhorses produced by Allis-Chalmers from 1962 to 1978. These tractors were designed to be robust, reliable, and easy to maintain, making them popular choices for a wide range of agricultural tasks. The D-21 featured a 4-cylinder, 275 cubic inch gasoline engine that produced 50 horsepower, while the D-21 Series II introduced a more powerful 4-cylinder, 275 cubic inch diesel engine that generated 68 horsepower. Both models offered a variety of transmission options, including a 6-speed manual gearbox and a hydraulically controlled 4-speed powershift transmission. With a variety of features like a live hydraulic system, adjustable drawbar height, and a powerful PTO, the D-21 series offered the flexibility needed for tasks like plowing, cultivating, haying, and operating various implements.

The D-21 and D-21 Series II were renowned for their rugged construction and simple design. They featured a heavy-duty cast iron chassis, a sturdy front axle, and a rugged rear axle with a differential lock for superior traction in demanding conditions. The tractors were also known for their excellent visibility, intuitive controls, and comfortable operator station. Due to their reliability, versatility, and ease of maintenance, these tractors became favorites for farmers and ranchers across the country. The Allis-Chalmers D-21 and D-21 Series II tractors remain a popular choice for collectors and those seeking reliable and powerful workhorses for a variety of agricultural applications. Their enduring popularity speaks to their quality and the legacy of Allis-Chalmers in the world of farming equipment.