3068979
Pressure Regulator Plunger
Cummins®

Introduction

The Cummins 3068979 Pressure Regulator Plunger is a critical component for the fuel system of heavy-duty trucks. Manufactured by Cummins Inc., a prominent name in the automotive industry, this part is essential for maintaining the efficiency and reliability of truck engines. Cummins is known for its commitment to quality and innovation in automotive component manufacturing, and the 3068979 Pressure Regulator Plunger exemplifies these values ².

Function and Operation

The Pressure Regulator Plunger operates within the fuel system to maintain consistent fuel pressure. It regulates the pressure of fuel delivered to the engine, which is vital for efficient combustion and overall engine performance. The plunger adjusts the flow in response to changes in fuel pressure, ensuring that the engine receives a steady supply of fuel under varying conditions ¹.

Purpose of the Pressure Regulator Plunger

The specific role of the 3068979 Pressure Regulator Plunger in a truck’s operation is to contribute to the engine’s efficiency and reliability. By maintaining consistent fuel pressure, it helps ensure that the engine operates smoothly and efficiently, regardless of the load or driving conditions. This consistency is key to the engine’s performance and longevity ¹.

Key Features

The 3068979 Pressure Regulator Plunger is characterized by its robust design and the use of high-quality materials. These features enhance its durability and performance. The plunger is engineered to withstand the high pressures and temperatures within the fuel system, ensuring reliable operation over time. Its design also allows for easy installation and maintenance, contributing to the overall efficiency of truck maintenance procedures ².

Benefits

Using the Cummins 3068979 Pressure Regulator Plunger is associated with several benefits. These include improved fuel efficiency, as consistent fuel pressure leads to more efficient combustion. Enhanced engine performance is another advantage, with the engine operating more smoothly and reliably. Additionally, the reliability of the plunger contributes to the overall durability of the engine, reducing the likelihood of unexpected failures ¹.

Installation Process

Installing the 3068979 Pressure Regulator Plunger requires careful attention to detail. The process involves removing the old plunger, inspecting the fuel system for any signs of damage or wear, and then installing the new plunger. Proper tools and equipment are necessary for this task, and it is important to follow manufacturer guidelines to ensure correct installation. This may include torquing specifications for any fasteners used in the installation process ¹.

Troubleshooting Common Issues

Common issues with the Pressure Regulator Plunger may include inconsistent fuel pressure or engine performance problems. Symptoms of a malfunctioning plunger can include difficulty starting the engine, reduced power, or increased fuel consumption. Troubleshooting steps may involve inspecting the plunger for signs of wear or damage, checking the fuel system for leaks, and ensuring that the plunger is correctly installed ¹.

Maintenance Tips

Regular maintenance of the 3068979 Pressure Regulator Plunger is important for ensuring optimal performance and longevity. This includes periodic inspection for signs of wear or damage, and cleaning the plunger and its surrounding components to remove any buildup that could affect its operation. Following manufacturer recommendations for inspection intervals and maintenance procedures will help ensure the plunger continues to operate efficiently ¹.

Cummins Overview

Cummins Inc. has a long history of manufacturing high-quality automotive components. The company’s product range includes a variety of engines and components for heavy-duty trucks, known for their reliability and performance. Cummins’ commitment to quality and innovation is evident in all its products, including the 3068979 Pressure Regulator Plunger ².

Compatibility with Cummins Engines

The Pressure Regulator Plunger (Part 3068979) is compatible with various Cummins engines, ensuring precise fuel pressure regulation for optimal engine performance and efficiency.

ISM Series Engines

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

L10 Series Engines

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

M11 Series Engines

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

QSM11 Series Engines

• QSM11 CM570
• QSM11 CM876

Role in Engine Systems

The 3068979 Pressure Regulator Plunger is integral to maintaining optimal pressure within various engine systems. Its function is to regulate the pressure of fluids, ensuring that the engine operates efficiently and reliably.

Integration with the Engine and Cylinder Block

In the engine, the Pressure Regulator Plunger works in conjunction with the cylinder block to manage the pressure of lubricating oil. The cylinder block, which houses the cylinders and pistons, relies on a consistent supply of pressurized oil to reduce friction and wear. The Plunger ensures that the oil pressure remains within the desired range, preventing both under-lubrication and over-pressurization, which could lead to engine damage ².

Interaction with the Lubricating Oil System

The lubricating oil system is vital for the longevity and performance of the engine. The Pressure Regulator Plunger is installed in the oil pump, which is responsible for circulating oil throughout the engine. By regulating the pressure, the Plunger helps maintain a steady flow of oil to critical components such as the crankshaft, camshaft, and valve train. This consistent lubrication is essential for minimizing wear and tear, ensuring smooth operation, and enhancing the engine’s overall efficiency ².

Role in the Pump Mechanism

Within the pump mechanism, the Pressure Regulator Plunger interacts with various components to achieve its regulatory function. As the pump generates pressure, the Plunger modulates this pressure by adjusting its position. This dynamic adjustment ensures that the oil pressure remains stable, even as the engine’s demand for lubrication changes with varying operating conditions ².

Contribution to the Cylinder Block Kit

In a cylinder block kit, which includes various components designed to refurbish or upgrade the cylinder block, the Pressure Regulator Plunger plays a supportive role. By ensuring that the oil pressure is correctly regulated, it contributes to the effective functioning of the new or refurbished components within the kit. This regulation is particularly important during the break-in period of a newly assembled engine, where consistent lubrication is crucial for proper seating and performance of the components ².

Overall Engine Performance

The efficient operation of the Pressure Regulator Plunger directly impacts the engine’s performance. By maintaining optimal oil pressure, it helps in reducing friction, enhancing fuel efficiency, and prolonging the engine’s lifespan. The Plunger’s role in pressure regulation is a testament to the intricate balance required in engine design, where each component must work harmoniously to achieve peak performance ².

Conclusion

The Cummins 3068979 Pressure Regulator Plunger is a vital component in the fuel and lubrication systems of heavy-duty truck engines. Its role in maintaining consistent fuel and oil pressure is crucial for efficient engine operation, enhanced performance, and prolonged engine life. Regular maintenance and proper installation are key to ensuring the optimal functioning of this Cummins part.