This comprehensive service repair manual is a valuable resource for anyone working on International Harvester 766, 826, 966, 1026, and 1066 tractors. It provides in-depth instructions and detailed illustrations to guide you through every repair procedure, making even complex tasks manageable. The manual is designed for both experienced mechanics and DIY enthusiasts, offering a wealth of information to help you maintain and repair your tractor. The manual covers a wide range of topics, including: * **General Information:** Get familiar with your tractor's specifications, safety procedures, and maintenance schedules. * **Engine Mechanical System:** Learn about the engine's construction, operation, and repair, including components like the block, crankshaft, pistons, and valves. * **Engine Electrical System:** Understand the workings of the ignition system, charging system, and starting system, along with detailed wiring diagrams. * **Emission Control System:** Find information on the components and procedures related to your tractor's emissions system. * **Fuel System:** Explore the fuel system in detail, covering topics such as fuel tanks, filters, pumps, and injectors. * **Suspension System:** Learn about the various components of the suspension system, including springs, shocks, and axles, and how to troubleshoot and repair them. * **Clutch System:** Gain a thorough understanding of the clutch system, including its operation, adjustment, and replacement procedures. * **Manual Transaxle System:** This section covers the design, operation, and repair of your tractor's manual transmission. * **Automatic Transaxle System:** If your tractor has an automatic transmission, this section provides detailed information on its workings and repair. * **Driveshaft and Axle:** Get detailed information on the driveshaft and axle systems, including their components, maintenance, and repair processes. * **Steering System:** Learn about the steering system's components, operation, and adjustment procedures. * **Brake System:** This section covers the brake system, including hydraulics, components, and troubleshooting. * **Body Interior and Exterior:** Get information on body components, their repair, and maintenance. * **Body Electrical System:** This section focuses on the electrical systems related to the body, including lights, gauges, and other accessories. * **Restraint:** Understand the safety features of your tractor, including the restraint system, and how to maintain them. With its comprehensive coverage, step-by-step instructions, detailed illustrations, and troubleshooting guides, this manual is an essential tool for keeping your International Harvester tractor in top working order.

The International Harvester 766, 826, 966, 1026, and 1066 tractors were a series of powerful and versatile agricultural machines produced by International Harvester from the late 1960s to the early 1980s. These tractors represented a significant advancement in agricultural technology, featuring a robust design, advanced features, and impressive performance capabilities. They were renowned for their reliability, durability, and ability to handle a wide range of farm tasks, making them a popular choice among farmers worldwide. The 766, 826, 966, 1026, and 1066 models built upon the success of their predecessors, incorporating a range of improvements and innovations. These tractors were equipped with powerful diesel engines, ranging from 100 to 150 horsepower, providing ample power for pulling heavy implements and navigating challenging terrain. They featured a well-designed transmission system with multiple gear ratios, enabling operators to select the optimal speed and power for various tasks. The tractors also incorporated a hydraulic system that powered implements such as plows, cultivators, and hay balers. Their spacious cabs offered a comfortable and ergonomic workspace for operators, with features like adjustable seats, clear visibility, and easy access to controls.