This service repair manual covers the New Holland T9 Series Tractors, including specific models T9.390, T9.450, T9.505, T9.560, T9.615, and T9.670. These high-horsepower articulated 4WD tractors are designed for professional farmers and agricultural contractors undertaking heavy draft work. The T9 Series is engineered for power, fuel efficiency, and versatility, featuring robust build quality, advanced transmission options like Powershift and CVT, and high-flow hydraulic systems. Notable features include an articulated chassis for superior maneuverability, spacious and comfortable operator cabs, and Cummins engines known for their performance and reliability, meeting stringent emissions standards.

This manual provides comprehensive guidance for maintaining and repairing your New Holland T9 Series Tractor. It details diagnostic troubleshooting procedures, scheduled maintenance tasks, and step-by-step repair operations for all major systems, including engine, powertrain, hydraulics, and electrical systems. Coverage extends to operator station and cab components, chassis, steering, and braking systems. With detailed illustrations, critical specifications, and troubleshooting guides, this manual is an essential resource for owners, mechanics, and technicians to ensure optimal performance, longevity, and safe operation of the tractor.