3966864
Fuel Manifold
Cummins®

Introduction

The Cummins 3966864 Fuel Manifold is a critical component for commercial trucks equipped with Cummins engines. It ensures efficient fuel distribution to the injectors, contributing to engine performance and reliability.

Basic Concepts of a Fuel Manifold

A fuel manifold in diesel engines distributes fuel from the fuel pump to the injectors. It ensures consistent fuel flow to each injector, interacting with the fuel pump, injectors, and engine control unit for optimal fuel delivery ².

Purpose of the 3966864 Fuel Manifold

This Cummins part is designed to distribute fuel to injectors, ensuring each receives the correct amount at the right pressure and timing. This is vital for combustion efficiency, power output, and emissions control ².

Key Features

The 3966864 is constructed with high-quality materials for durability. It includes multiple ports for efficient fuel distribution, engineered to withstand high pressures and temperatures. It may also feature integrated sensors or enhanced sealing mechanisms ¹.

Benefits

Using the 3966864 offers improved fuel distribution, enhancing engine performance through optimal fuel delivery to each cylinder. This leads to better combustion efficiency and increased power output, contributing to engine reliability ².

Installation and Compatibility

Proper installation of this part is crucial. It is designed for specific Cummins engine models, ensuring a precise fit. Installation should follow manufacturer guidelines for secure connections and proper alignment with injectors and other fuel system components ².

Troubleshooting and Maintenance

Regular maintenance is important for the longevity of the 3966864. Common issues include wear, leaks, or inconsistent fuel delivery. Maintenance tips include inspecting for damage, ensuring tight connections, and checking for leaks ².

Performance Enhancements

The 3966864 contributes to engine efficiency and performance by ensuring precise fuel distribution. This leads to better combustion, improved fuel economy, and reduced emissions. Potential upgrades may further enhance performance ².

Safety Considerations

When working with the 3966864, follow safety practices including proper handling, adhering to installation guidelines, and conducting regular maintenance checks. Work in a well-ventilated area and use appropriate personal protective equipment ².

Cummins Corporation

Cummins Corporation is renowned for producing high-quality automotive components. Their commitment to innovation and excellence is evident in the design and performance of products like the 3966864 Fuel Manifold ².

Compatibility

Compatibility with 6B5.9 Engines

The 6B5.9 engine series benefits from the 3966864’s precise engineering, ensuring even fuel distribution across cylinders for consistent power output and minimized wear ².

Compatibility with QSB5.9 30 CM550 Engines

For the QSB5.9 30 CM550 engine, the 3966864 is engineered to meet specific demands, delivering fuel at the correct pressure and flow rate for durability and performance ².

Compatibility with CM550 Engines

The CM550 engine series relies on the 3966864 for fuel management, ensuring efficiency and responsiveness by delivering fuel in a manner that supports operational requirements ².

Role of 3966864 in Engine Systems

This part is integral to the fuel delivery system, distributing fuel from the pump to injectors. It ensures each cylinder receives a consistent amount of fuel, essential for optimal engine performance and efficiency ².

Integration with Fuel System Components

1. Fuel Pump: The manifold receives pressurized fuel from the pump, vital for injector functioning ².
2. Fuel Injectors: It ensures even fuel distribution to all injectors, important for maintaining the correct air-fuel ratio ².
3. Fuel Rail: Often part of the fuel rail, it helps maintain consistent fuel pressure ².
4. Plumbing: Connected to the engine’s fuel plumbing system, ensuring proper sealing and connection to prevent leaks ².
5. Fuel Pressure Regulator: Works with a regulator to maintain desired fuel pressure ².
6. Return Line: May include a connection for a return line to manage fuel flow and pressure ².

Conclusion

The Cummins 3966864 Fuel Manifold is a vital component in the fuel delivery system, ensuring efficient and consistent fuel distribution to the injectors. Its integration with various fuel system components highlights its importance in engine functionality and performance.