This service repair manual covers the Allis-Chalmers D-14, D-15, D-15 Series II, D-17, D-17 Series III, and D-17 Series IV tractor models. These robust machines were integral to mid-20th-century agriculture, known for their distinctive 'Persian Orange' color, reliable performance, and innovative features like the Traktor-Lift hydraulic system. The D-Series tractors offered various engine options, including gasoline, diesel, and LP Gas, alongside different transmission configurations, some featuring a 'Power Director' for enhanced operational flexibility. Their enduring design and build quality have made them a subject of interest for owners, mechanics, and restorers seeking to maintain their functionality and legacy.

This comprehensive manual provides in-depth technical guidance for the maintenance, diagnosis, and repair of these Allis-Chalmers tractors. It covers a wide array of systems, including the engine, fuel, cooling, ignition, clutch, transmission, hydraulics, steering, brakes, and electrical systems, as well as the front and rear axles, chassis, and bodywork. Detailed procedures for component disassembly, reassembly, troubleshooting, and adjustments are included, along with essential specifications, torque values, and fluid recommendations. The manual is designed to assist both experienced mechanics and dedicated DIY enthusiasts in keeping these classic tractors in optimal working condition.