This manual covers the Allis-Chalmers Tractor Models 170 and 175. Allis-Chalmers has a significant heritage in manufacturing robust agricultural and industrial equipment, and these tractors represent their commitment to reliable and innovative designs. While specific production years are not detailed, these models were likely part of the company's offerings during the late 1960s and 1970s, serving as capable mid-range utility tractors. Their engineering is known for durability, making them a valuable asset for various agricultural tasks. This comprehensive workshop service repair manual is designed to provide owners and technicians with the detailed information necessary for effective maintenance and repair. It covers a wide array of systems, including the engine, transmission, electrical, hydraulics, fuel, cooling, lubrication, brakes, steering, PTO, operator station, chassis, and rolling stock. The manual offers step-by-step repair procedures, diagnostic guidance, overhaul instructions, routine maintenance schedules, and technical specifications, all presented in English. Its detailed content ensures that users can perform everything from basic upkeep to complex overhauls, promoting cost savings and extending the operational life of the tractor.