The Allis-Chalmers D17 Series 3, produced between 1960 and 1964, represents a significant piece of agricultural machinery known for its versatility and robust engineering. This tractor, a popular choice for a wide array of farming tasks, typically features a diesel engine and a manual transmission, often enhanced with a Power-Director clutch-assist mechanism for improved operational flexibility. Its design prioritizes durability and reliability, making it a dependable workhorse for demanding agricultural environments. The D17 Series 3 builds upon the legacy of its predecessors, incorporating updates that further solidified its position as a capable and enduring tractor. This workshop service manual provides comprehensive coverage for the Allis-Chalmers D17 Series 3, offering detailed instructions for maintenance, troubleshooting, and repair. It delves into all major systems, including the engine, fuel, cooling, lubrication, electrical, transmission, hydraulics, brakes, and steering. The manual includes step-by-step procedures for disassembly, assembly, adjustments, and component repair, supported by diagrams, illustrations, and factory specifications. Its purpose is to equip mechanics and owners with the essential knowledge and methodology required to maintain the tractor's optimal performance and longevity.