The Allis-Chalmers Model 175 is a versatile utility tractor produced during the late 1960s and 1970s, a period when Allis-Chalmers was a prominent American manufacturer known for its distinctive orange machinery. This model, likely powered by a 3 or 4-cylinder diesel engine, offered robust performance typically in the 40-60 PTO horsepower range, making it suitable for a variety of agricultural and industrial tasks. Its design emphasized reliability and build quality, characteristic of the brand's legacy. The Model 175 featured a manual transmission with multiple forward and reverse gears, and its construction was geared towards practicality and ease of operation for its intended users. This comprehensive Workshop Service Manual (WSM) provides detailed information for all services, repairs, and routine maintenance of the Allis-Chalmers Model 175 tractor. It covers essential systems including the engine, transmission, hydraulics, electrical, fuel, cooling, brakes, steering, axles, and power take-off (PTO). The manual includes step-by-step instructions, troubleshooting charts, wiring diagrams, and essential specifications such as torque and timing values, enabling owners and technicians to perform diagnostics, repairs, and rebuilds efficiently. Its purpose is to facilitate DIY maintenance, saving costs and ensuring the longevity of the tractor through clear, easy-to-follow guidance.