This comprehensive service and repair manual provides detailed technical information for New Holland T9 series tractors, covering models T9.390, T9.450, T9.505, T9.560, T9.615, and T9.670. The manual encompasses a wide range of topics to assist technicians and owners in maintaining and repairing these powerful machines. It includes detailed instructions for troubleshooting, diagnosing, and resolving common issues, along with step-by-step procedures for servicing and repairing various components. The manual also features detailed diagrams, illustrations, and specifications, making it easy to understand and follow. From engine and transmission systems to hydraulics, electronics, and bodywork, this manual offers comprehensive coverage of every aspect of these tractors. This invaluable resource will empower you to perform a wide range of maintenance and repair tasks, ensuring the optimal performance and longevity of your New Holland T9 tractor.