4940688
Fuel Supply Tube
Cummins®

The Cummins 4940688 Fuel Supply Tube is a critical component in the fuel systems of heavy-duty trucks, facilitating the delivery of fuel from the tank to the engine. This ensures a consistent and reliable fuel supply for combustion, contributing to the engine’s efficient operation and overall truck performance ².

Basic Concepts of Fuel Supply Tubes

A fuel supply tube, such as the Cummins 4940688, is a conduit within the fuel system designed to transport fuel from the tank to the engine. It ensures that fuel is delivered under the correct pressure and in the right quantity, maintaining a steady fuel flow necessary for consistent engine performance and efficiency ³.

Purpose of the Cummins 4940688 Fuel Supply Tube

The Cummins 4940688 Fuel Supply Tube ensures a consistent and reliable fuel supply to the engine. It is engineered to withstand the pressures and conditions within the fuel system, providing a durable and efficient means of fuel transport. This contributes to smooth and efficient engine operation, enhancing the truck’s overall performance ¹.

Key Features

The Cummins 4940688 Fuel Supply Tube is constructed from durable materials designed to resist the conditions within the fuel system. Its precise engineering ensures a proper fit and function, while specific coatings or treatments protect against corrosion and wear, enhancing reliability in demanding conditions ².

Benefits of Using the Cummins 4940688 Fuel Supply Tube

Using the Cummins 4940688 Fuel Supply Tube offers several advantages, including improved fuel efficiency by ensuring leak-free and uninterrupted fuel delivery. This consistent fuel supply allows the engine to operate at optimal efficiency, leading to enhanced performance. Additionally, the tube’s durability and reliability reduce the likelihood of fuel system failures in demanding conditions ³.

Installation and Integration

Installing the Cummins 4940688 Fuel Supply Tube requires following manufacturer guidelines to ensure compatibility with various truck models and proper integration within the existing fuel system. Correct positioning and securing of the tube are crucial for its intended function within the fuel system ¹.

Maintenance and Troubleshooting

Regular maintenance of the Cummins 4940688 Fuel Supply Tube is essential for its longevity and optimal performance. Inspections can identify potential issues such as leaks or blockages, which can be addressed through cleaning or replacement. Following manufacturer guidelines for inspection and care, and promptly addressing any issues, helps prevent further damage to the fuel system ².

Safety Considerations

When working with the fuel supply system and the Cummins 4940688 Fuel Supply Tube, it is important to observe safety practices. This includes handling fuel with care to avoid spills and contamination, and performing maintenance tasks in a well-ventilated area to prevent the buildup of fumes. Following manufacturer guidelines for installation and maintenance ensures the fuel supply system operates safely and efficiently ³.

Cummins: A Brief Overview

Cummins Inc. is renowned in the automotive and heavy-duty truck industry for its quality and reliable products, including engines, filtration, and power generation equipment. The company’s commitment to innovation and customer satisfaction has established it as a trusted name, with a product range that meets various application needs ¹.

Cummins Engine Compatibility with Fuel Supply Tube Part 4940688

The Cummins Fuel Supply Tube part number 4940688 is designed to fit a variety of Cummins engines, ensuring a secure and efficient fuel supply system. This part is integral to maintaining the performance and reliability of these engines. Below is a detailed breakdown of the engines that are compatible with this fuel supply tube.

Compatible Engines

• B6.7 CM2670 B153B
• ISB CM2150
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISBE CM2150
• ISBE4 CM850
• QSB6.7 CM2250
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

Grouping of Compatible Engines

The Cummins Fuel Supply Tube part number 4940688 is compatible with a range of engines that share similar design and operational characteristics. Here is a grouping of these engines based on their series and specifications:

• ISB Series:

  • ISB CM2150
  • ISB/ISD6.7 CM2150 SN
  • ISB6.7 CM2250
  • ISB6.7 CM2350 B101

• ISBE Series:

  • ISBE CM2150
  • ISBE4 CM850

• QSB Series:

  • QSB6.7 CM2250
  • QSB6.7 CM850 (CM2850)
  • QSB7 CM2880 B117

• B6.7 Series:

  • B6.7 CM2670 B153B

Each of these engines benefits from the precise engineering of the Cummins Fuel Supply Tube part number 4940688, ensuring that the fuel supply system operates smoothly and efficiently. This compatibility is crucial for maintaining the performance and longevity of the engines, providing users with a reliable and high-quality component ².

Role of Part 4940688 Fuel Supply Tube in Engine Systems

The 4940688 Fuel Supply Tube is an integral component in the fuel delivery system of various engine setups. It is responsible for transporting fuel from the fuel tank to the engine’s fuel injection system or carburetor. This ensures a consistent and reliable fuel supply, which is essential for the engine’s performance and efficiency.

In modern fuel-injected engines, the 4940688 Fuel Supply Tube works in conjunction with the fuel pump, fuel filter, and fuel injectors. The fuel pump draws fuel from the tank and pressurizes it, while the fuel filter removes any impurities. The 4940688 Fuel Supply Tube then delivers the clean, pressurized fuel to the fuel injectors, which atomize the fuel into the combustion chambers for efficient burning.

In carbureted engines, the 4940688 Fuel Supply Tube feeds fuel to the carburetor, where it is mixed with air before entering the combustion chambers. The tube must be properly routed and secured to prevent fuel leaks and ensure a steady fuel flow.

Additionally, the 4940688 Fuel Supply Tube is often equipped with fittings and connectors that allow it to interface with various plumbing components, such as fuel lines, hoses, and quick-connect fittings. This enables easy installation, maintenance, and replacement of the tube, as well as compatibility with different engine configurations.

Overall, the 4940688 Fuel Supply Tube plays a significant role in maintaining the integrity and efficiency of the fuel delivery system in engine applications. Its proper function ensures that the engine receives the necessary fuel supply for optimal performance and reliability ³.

Conclusion

The Cummins 4940688 Fuel Supply Tube is a vital component in the fuel systems of heavy-duty trucks, ensuring a consistent and reliable fuel supply to the engine. Its durable construction, precise engineering, and compatibility with various Cummins engines make it an essential part for maintaining engine performance and reliability. Proper installation, maintenance, and adherence to safety practices are crucial for the efficient operation of the fuel supply system.