3933846
Air Control Valve
Cummins®

The Cummins Injector Fuel Supply Tube, part number 3933846, is a critical component designed to facilitate the delivery of fuel within the fuel system of heavy-duty trucks. Its role is integral to ensuring that fuel is supplied efficiently and consistently to the injectors, thereby supporting optimal engine operation ¹.

Basic Concepts

Injector fuel supply tubes are fundamental components within the fuel injection system of diesel engines. They are responsible for transporting fuel from the fuel rail to the injectors. The efficiency of these tubes directly influences engine performance, as they must maintain consistent fuel pressure and flow to ensure precise fuel delivery. This precision is vital for combustion efficiency and overall engine reliability ².

Purpose and Function

The Injector Fuel Supply Tube 3933846 plays a significant role in the operation of a truck by delivering fuel to the injectors. It ensures that fuel is supplied under consistent pressure, which is crucial for the injectors to atomize fuel properly during the injection process. This consistent pressure helps in achieving efficient combustion, which in turn supports engine performance and fuel economy ³.

Key Features

The Injector Fuel Supply Tube 3933846 is constructed from high-quality materials that offer durability and resistance to the high pressures and temperatures within the fuel system. Its design specifications include precise dimensions and smooth internal surfaces to minimize fuel flow resistance. Additionally, the tube may feature reinforced connections to withstand the dynamic stresses encountered during engine operation, enhancing its performance and longevity.

Benefits

Utilizing the Injector Fuel Supply Tube 3933846 can lead to several advantages. These include improved fuel efficiency due to consistent fuel delivery, enhanced engine performance resulting from precise fuel atomization, and increased reliability under demanding operating conditions. The tube’s robust construction also contributes to reduced maintenance requirements and longer service life.

Installation and Maintenance

Proper installation of the Injector Fuel Supply Tube 3933846 involves ensuring that all connections are secure and that the tube is correctly positioned within the fuel system. Regular maintenance includes inspecting the tube for signs of wear or damage, cleaning it to remove any contaminants, and replacing it if necessary to maintain optimal performance. Following manufacturer guidelines for inspection intervals and replacement procedures is recommended to ensure the tube continues to function effectively.

Troubleshooting

Common issues with the Injector Fuel Supply Tube 3933846 may include fuel leaks, pressure fluctuations, and performance inconsistencies. Troubleshooting these problems involves checking for proper tube installation, inspecting connections for leaks, and verifying that the tube is free from obstructions or damage. Addressing these issues promptly can help maintain engine performance and prevent more significant problems.

Cummins Overview

Cummins Inc. is a well-established manufacturer in the automotive industry, known for its high-quality components for heavy-duty trucks. With a history of innovation and commitment to excellence, Cummins has built a reputation for producing reliable and durable parts that meet the demanding requirements of commercial vehicle applications. The company’s focus on quality and performance is evident in its range of products, including the Injector Fuel Supply Tube 3933846.

Cummins Injector Fuel Supply Tube (Part 3933846)

The Cummins Injector Fuel Supply Tube, part number 3933846, is a critical component in the fuel delivery system of several Cummins engine models. This part ensures that fuel is efficiently and accurately delivered to the injectors, which is essential for maintaining optimal engine performance and efficiency.

Compatible Engines

• B5.9 G
• B5.9 GAS PLUS CM556
• C GAS PLUS CM556
• C8.3 G
• ISB5.9G CM2180
• ISB6.7 G CM2180 B118
• ISL G CM2180
• ISX12 G CM2180 EJ
• L GAS PLUS CM556
• L10 GAS

Grouping of Compatible Engines

The Cummins Injector Fuel Supply Tube is designed to fit seamlessly with a range of engine models, ensuring compatibility across various applications. Here is a breakdown of the compatible engines grouped by their series:

• B Series:

  • B5.9 G
  • B5.9 GAS PLUS CM556

• C Series:

  • C GAS PLUS CM556
  • C8.3 G

• ISB Series:

  • ISB5.9G CM2180

• ISB/ISL Series:

  • ISB6.7 G CM2180 B118
  • ISL G CM2180

• ISX Series:

  • ISX12 G CM2180 EJ

• L Series:

  • L GAS PLUS CM556
  • L10 GAS

This part is engineered to meet the specific requirements of each engine series, ensuring a precise fit and reliable performance.

Role of Part 3933846 Injector Fuel Supply Tube in Engine Systems

The Injector Fuel Supply Tube, identified by part number 3933846, is an integral component in the fuel delivery system of an engine. It is responsible for transporting pressurized fuel from the fuel control module to the injectors. This ensures a consistent and regulated fuel supply, which is essential for the efficient operation of the engine.

Integration with Key Components

• Fuel Control Module: The Injector Fuel Supply Tube connects directly to the Fuel Control Module, which manages the fuel supply to the injectors. This connection ensures that the fuel is delivered at the correct pressure and volume.

• Injectors: The tube supplies fuel to the injectors, which then atomize the fuel into the combustion chamber. Proper fuel delivery is vital for maintaining the air-fuel ratio, which affects engine performance and emissions.

• Fuel Pressure Regulator: This component works in conjunction with the Injector Fuel Supply Tube to maintain consistent fuel pressure. The regulator ensures that the fuel delivered through the tube meets the engine’s requirements under varying operating conditions.

• Air Fuel Mixer: The fuel supplied by the Injector Fuel Supply Tube is mixed with air in the Air Fuel Mixer. This mixture is critical for combustion efficiency and overall engine performance.

• Electronic Governor: The Electronic Governor monitors and adjusts the fuel supply based on engine load and speed. The Injector Fuel Supply Tube facilitates this by providing a reliable fuel pathway.

• Turbocharger Plumbing: In turbocharged engines, the Injector Fuel Supply Tube may be part of the Turbocharger Plumbing system. It ensures that the increased air intake is matched with an appropriate fuel supply, optimizing turbocharger performance.

• Water Outlet Connection: In some engine designs, the Injector Fuel Supply Tube may be routed near the Water Outlet Connection. This proximity can help in cooling the fuel supply tube, enhancing its durability and performance.

• Assembly Kit and Kitting: When installing or replacing the Injector Fuel Supply Tube, it is often included in an Assembly Kit. This kit may contain all necessary components and fittings to ensure a proper and secure installation.

Conclusion

The Injector Fuel Supply Tube (part 3933846) plays a significant role in ensuring that the fuel delivery system operates efficiently and reliably. Its integration with various engine components highlights its importance in maintaining optimal engine performance.