This comprehensive service repair manual provides detailed instructions for maintaining and repairing the New Holland 667TA EEC Engine (87519804 NA). The manual assumes a basic understanding of the engine's operation and emphasizes safety procedures. It focuses on repairs requiring specialized knowledge and expertise, covering a wide range of components and systems. The manual is designed for technicians working on various applications of this engine, acknowledging that not all components may be installed on every unit. Important to note, the manual reflects the engine's design at the time of publication; subsequent developments might result in variations in descriptions, illustrations, and parts. Consistent and complete adherence to the maintenance schedules outlined in this manual and the corresponding operation manual is crucial. Maintenance personnel should possess the necessary technical proficiency to perform all tasks safely and correctly. They must ensure that all removed safety and protection devices are reinstalled after maintenance work is completed.

The New Holland 667TA EEC engine, identified by the part number 87519804 NA, is a powerful and reliable powerplant designed for demanding agricultural and industrial applications. This engine is a member of the renowned New Holland family of engines, known for their robust construction, efficient performance, and long service life. The 667TA EEC is a four-stroke, turbocharged, aftercooled diesel engine with a displacement of 6.6 liters (403 cubic inches). Its powerful design allows it to deliver impressive torque and horsepower outputs, making it a suitable choice for a variety of applications, including tractors, combines, excavators, and generators. The engine is equipped with an electronic control unit (EEC) which manages various engine parameters, including fuel injection, ignition timing, and emissions control, optimizing performance and efficiency. The New Holland 667TA EEC engine is built with high-quality components and features a durable cast-iron block and cylinder head, ensuring long-lasting performance even under harsh operating conditions. The engine is designed for easy maintenance, with readily accessible components for routine inspections and repairs. The presence of a turbocharger and an aftercooler enhances the engine's power output and fuel efficiency. The turbocharger boosts the intake air pressure, resulting in increased power and torque, while the aftercooler cools the air before it enters the cylinders, improving combustion efficiency and reducing emissions. The 667TA EEC engine also boasts advanced emissions control systems, including a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) system, which effectively reduce harmful emissions and meet stringent environmental regulations. This makes it a sustainable and environmentally responsible power source for a wide range of applications.