The Allis-Chalmers 180 / 185 represents a robust line of agricultural tractors, produced primarily in the United States during the late 1960s and early 1970s. Known for their reliability and utility, these tractors were powered by diesel engines, typically Perkins, and featured manual transmissions with multiple forward and reverse gears. Their design prioritized dependable performance for demanding agricultural tasks, offering substantial horsepower and torque for fieldwork. The Allis-Chalmers brand has a strong heritage in manufacturing agricultural and construction equipment, and the 180/185 series was a well-regarded model within its market segment, valued for its straightforward engineering and operational effectiveness. This comprehensive workshop and service repair manual provides essential information for the maintenance, repair, and troubleshooting of the Allis-Chalmers 180 / 185 tractors. It covers a wide array of systems, including the engine, cooling, fuel, powertrain, electrical, hydraulic, and braking systems, along with detailed procedures for clutch, differential lock, power take-off, and steering mechanisms. The manual includes step-by-step repair instructions, diagnostic guidance, and technical specifications such as torque values and fluid capacities. Written for independent service professionals and informed owners, this manual ensures accurate and cost-effective upkeep, offering dealership-level service information in an accessible format.