The Allis-Chalmers D14, produced between 1957 and 1960, is a robust agricultural tractor known for its reliable performance and versatile capabilities. This model, powered by a 2.5L 3-cylinder engine available in gasoline, LPG, or Diesel variants, offered approximately 38 PTO horsepower and was designed for consistent low-end torque, making it suitable for a wide range of farm tasks. Its engineering reflects the quality and durability characteristic of Allis-Chalmers, a prominent American manufacturer. The D14 features a constant mesh transmission with 6 forward and 2 reverse speeds, a two-stage dry clutch, and options for live PTO or a standard 540 RPM PTO, enhancing its utility for various implements. This comprehensive Workshop Service Repair Manual provides detailed, step-by-step instructions for the complete service and repair of the Allis-Chalmers D14. It covers all major systems, including the engine, fuel, cooling, ignition, transmission, hydraulic, steering, braking, and electrical systems. The manual includes routine maintenance procedures, troubleshooting guides, overhaul instructions, component replacement steps, torque specifications, and fluid capacities. With detailed diagrams and clear explanations, this manual is an essential resource for owners, operators, and mechanics to maintain, diagnose, and repair the D14, ensuring its continued operational efficiency and longevity.