5479090
Pressure Regulator Plunger
Cummins®

The Cummins 5479090 Pressure Regulator Piston is a component designed to maintain consistent fuel pressure within the fuel system of heavy-duty trucks. Its role is significant in ensuring the efficient and reliable operation of Cummins engines. By regulating fuel pressure, this part contributes to the overall performance and longevity of the engine.

Basic Concepts of Pressure Regulator Piston

Pressure regulator pistons operate on the principle of maintaining a steady fuel pressure within the system. They function by adjusting the position of the piston in response to changes in fuel pressure. When pressure exceeds a certain threshold, the piston moves to restrict fuel flow, thereby reducing pressure. Conversely, if pressure drops below the desired level, the piston allows more fuel to flow, increasing pressure. This dynamic adjustment ensures that the fuel system operates within optimal pressure ranges, which is vital for engine performance ¹.

Role of the 5479090 Pressure Regulator Piston in Truck Operation

In the fuel system of Cummins engines, the 5479090 Pressure Regulator Piston plays a specific role by ensuring that fuel is delivered at a consistent pressure to the injectors. This consistent pressure is crucial for the precise atomization of fuel, which enhances combustion efficiency. Proper fuel atomization leads to more complete combustion, which in turn improves engine performance and fuel efficiency. Additionally, stable fuel pressure helps in reducing wear on fuel system components, contributing to the overall reliability of the engine ².

Key Features of the 5479090 Pressure Regulator Piston

The design and construction of the 5479090 Pressure Regulator Piston are tailored to ensure both functionality and durability. It is made from high-quality materials that can withstand the high pressures and temperatures within the fuel system. The piston features precise machining to ensure smooth operation and accurate pressure regulation. Additionally, it is designed to be compatible with various Cummins engine models, making it a versatile component in the fuel system.

Benefits of Using the 5479090 Pressure Regulator Piston

The use of the 5479090 Pressure Regulator Piston offers several advantages. It contributes to improved fuel efficiency by ensuring that fuel is delivered at the optimal pressure, which enhances combustion efficiency. This results in better engine performance, as the engine operates more smoothly and with greater power. Additionally, the consistent pressure regulation provided by this part increases the reliability of the fuel system, reducing the likelihood of fuel-related issues and extending the lifespan of the engine.

Installation and Maintenance

Proper installation and routine maintenance of the 5479090 Pressure Regulator Piston are vital for ensuring optimal performance and longevity. During installation, it is important to follow the manufacturer’s guidelines to ensure that the piston is correctly positioned and secured. Routine maintenance should include regular inspections for signs of wear or damage, as well as cleaning the piston to remove any debris that could affect its operation. Additionally, it is advisable to replace the piston according to the manufacturer’s recommended service intervals to prevent potential failures.

Troubleshooting Common Issues

Common problems associated with pressure regulator pistons can include inconsistent fuel pressure, which may manifest as engine performance issues such as rough idling or reduced power. To troubleshoot these issues, it is important to first check the piston for signs of wear or damage. If the piston appears to be in good condition, the next step is to inspect the fuel lines and connections for leaks or blockages. Additionally, ensuring that the fuel filter is clean and functioning properly can help resolve pressure-related issues.

Cummins Corporation

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for innovation, quality, and reliability in the automotive industry. The company’s product offerings cater to various sectors, including transportation, construction, and industrial applications, making it a trusted name in the field of engine technology.

Cummins Pressure Regulator Piston 5479090 Compatibility

The Cummins Pressure Regulator Piston part number 5479090 is a critical component in the fuel injection system of various Cummins engines. This part is designed to regulate the pressure within the fuel system, ensuring optimal performance and efficiency. Below is a detailed description of the engines with which this part is compatible:

B4.5 Series Engines

• B4.5 CM2350 B129B
• ISB4.5 CM2350 B104

These engines are part of the B4.5 series, known for their reliability and efficiency in various applications. The Pressure Regulator Piston 5479090 is specifically engineered to fit these engines, ensuring precise pressure regulation and smooth operation.

D4.0 Series Engines

• D4.0 CM2620 D103B

The D4.0 series engines are designed for durability and performance. The Pressure Regulator Piston 5479090 is compatible with the D4.0 CM2620 D103B, providing the necessary pressure control for efficient fuel delivery.

F3.8 Series Engines

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• ISF3.8 CM2220 F103
• ISF3.8 CM2350 F109
• QSF3.8 CM2350 F107

The F3.8 series engines are widely used in various applications due to their robust design and performance. The Pressure Regulator Piston 5479090 is compatible with multiple F3.8 engines, including the CM2350 and CM2620 variants, as well as the ISF3.8 and QSF3.8 models.

F4.5 Series Engines

• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

The F4.5 series engines are known for their high performance and efficiency. The Pressure Regulator Piston 5479090 fits these engines, ensuring that the fuel system operates at the correct pressure levels for optimal performance.

ISF3.8 Series Engines

• ISF3.8 CM2220 AN

The ISF3.8 series engines are designed for heavy-duty applications. The Pressure Regulator Piston 5479090 is compatible with the ISF3.8 CM2220 AN, providing the necessary pressure control for these demanding engines.

ISF4.5 Series Engines

• ISF4.5 CM2220 F123

The ISF4.5 series engines are built for heavy-duty use. The Pressure Regulator Piston 5479090 is compatible with the ISF4.5 CM2220 F123, ensuring that the fuel system maintains the correct pressure for reliable performance.

QSF3.8 Series Engines

• QSF3.8 CM2350 F107
• QSF3.8 CM2880 F112

The QSF3.8 series engines are designed for specific applications requiring high performance. The Pressure Regulator Piston 5479090 is compatible with both the CM2350 and CM2880 variants in this series, ensuring precise pressure regulation.

By ensuring compatibility with a wide range of Cummins engines, the Pressure Regulator Piston 5479090 plays a crucial role in maintaining the performance and efficiency of these engines.

Role of Part 5479090 Pressure Regulator Piston in Engine Systems

The part 5479090 Pressure Regulator Piston is an essential component in the regulation of pressure within engine systems, particularly in relation to the lubricating oil pump and the overall lubrication system.

In the context of the lubricating oil pump, the Pressure Regulator Piston works in conjunction with the pump to maintain consistent oil pressure. As the pump circulates lubricating oil throughout the engine, the Pressure Regulator Piston adjusts to ensure that the pressure remains within the desired range. This is achieved by modulating the flow of oil back to the pump’s inlet or to a relief valve, thereby preventing excessive pressure that could lead to system damage.

The interaction between the Pressure Regulator Piston and the lubricating oil is also significant. Proper pressure regulation ensures that the lubricating oil effectively reaches all moving parts within the engine, providing the necessary lubrication to reduce friction and wear. This, in turn, contributes to the overall efficiency and longevity of the engine components.

Additionally, the Pressure Regulator Piston plays a role in maintaining the stability of the lubrication system during varying engine operating conditions. Whether the engine is idling or under full load, the piston helps to adapt the oil pressure to meet the demands of the system, ensuring optimal performance and protection for the engine’s internal components ³.

Conclusion

The Cummins 5479090 Pressure Regulator Piston is a vital component in the fuel and lubrication systems of Cummins engines. Its role in maintaining consistent pressure ensures optimal engine performance, efficiency, and longevity. Proper installation, maintenance, and troubleshooting are essential to maximize the benefits of this part.