The New Holland TM Series tractors, including models TM115, TM125, TM135, TM150, and TM165, represent a robust line of agricultural machinery produced until 2002. These tractors are engineered for demanding farm operations, featuring powerful turbocharged, direct injection diesel engines with horsepower ranging from approximately 115 to 165 HP. They are equipped with advanced powershift transmissions offering multiple gear ratios and often include features like a power shuttle for efficient directional changes, making them versatile for a wide array of tasks from heavy draft work to precise PTO operations. The TM Series is built upon a legacy of agricultural innovation, designed for reliability and performance in challenging environments. This comprehensive workshop service and repair manual provides detailed technical information for the New Holland TM Series tractors. With 1852 pages of content, it covers all essential aspects of maintenance, diagnostics, and repair. Key areas include in-depth procedures for engine, transmission, hydraulic, electrical, braking, steering, and chassis systems, alongside detailed specifications, tolerances, and troubleshooting guides. The manual is designed to assist professional agricultural mechanics, farm owners, and service technicians in maintaining optimal performance, ensuring longevity, and efficiently resolving any issues that may arise with these tractors.