3958909
Fuel Drain Tube
Cummins®

AVAILABLE

Cummins®

4 are currently available

Ships within 2-4 business days

$76.95 $91.57

This truck part is made by Cummins®. We guarantee that all of our parts are from the OEM (original equipment manufacturer), ensuring a proper fit and quality manufacturing.


DESCRIPTION

Understanding The Cummins 3958909 Fuel Drain Tube

Introduction to the Cummins 3958909 Fuel Drain Tube

The Cummins 3958909 Fuel Drain Tube is a critical component in the fuel system of commercial trucks. This part is essential for maintaining engine efficiency and reliability by facilitating the removal of water and sediment from the fuel tank. Understanding its function and importance can significantly enhance maintenance and troubleshooting processes for engineers, mechanics, truck drivers, and fleet operators 1.

Basic Concepts Related to a Fuel Drain Tube

A Fuel Drain Tube is designed to allow the removal of contaminants, such as water and sediment, from the fuel tank. It is typically located at the lowest point of the fuel tank, ensuring that any accumulated impurities can be easily drained out. This is vital for maintaining fuel quality and preventing potential engine damage 2.

How a Fuel Drain Tube Works

The Cummins 3958909 Fuel Drain Tube operates by providing a direct pathway for contaminants to exit the fuel tank. When the drain valve is opened, fuel and contaminants flow through the tube and out of the tank. This process helps keep the fuel clean and free from impurities that could clog fuel filters or harm the engine 3.

Purpose of the Cummins 3958909 Fuel Drain Tube

The primary purpose of the Cummins 3958909 Fuel Drain Tube is to ensure that the fuel in the tank remains clean and free from contaminants. By allowing the easy removal of water and sediment, it helps maintain the efficiency and longevity of the engine. This is particularly important in commercial trucks where fuel quality can significantly impact performance and reliability.

Role in the Operation of a Truck

In the operation of a commercial truck, the Cummins 3958909 Fuel Drain Tube ensures that the fuel system remains free from impurities. This is crucial for the smooth operation of the engine, as contaminants in the fuel can lead to blockages, reduced performance, and potential engine damage. Regular maintenance of the fuel drain tube is essential to prevent these issues.

Troubleshooting and Maintenance

Troubleshooting

  1. Fuel Contamination: If the engine is experiencing performance issues, check the fuel drain tube for blockages or leaks. Clear any blockages and repair any leaks to ensure proper drainage.
  2. Water Accumulation: If water is found in the fuel tank, ensure the fuel drain tube is functioning correctly. Drain the water and inspect the tube for damage.
  3. Engine Performance Issues: Poor engine performance can be a sign of a faulty fuel drain tube. Inspect the tube for blockages and ensure it is not damaged.

Maintenance

  1. Regular Inspections: Regularly inspect the Cummins 3958909 Fuel Drain Tube for signs of wear, corrosion, or blockages. Clean the tube as necessary to maintain its functionality.
  2. Proper Storage: When not in use, store the fuel drain tube in a clean, dry environment to prevent contamination and corrosion.
  3. Correct Installation: Ensure the fuel drain tube is correctly installed according to the manufacturer’s specifications. Incorrect installation can lead to inefficiencies and potential failures.

Information About Cummins

Cummins is a leading global power leader that designs, manufactures, sells, and services a broad range of power systems. Known for its high-quality and reliable products, Cummins has a strong presence in the commercial truck and heavy-duty vehicle markets. The Cummins 3958909 Fuel Drain Tube is a testament to their commitment to providing durable and efficient components for the industry.

Expertise and Authority

As an expert in commercial truck parts, it is evident that the Cummins 3958909 Fuel Drain Tube is a critical component in maintaining the performance and reliability of commercial trucks. By understanding its function, purpose, and maintenance requirements, engineers, mechanics, truck drivers, and fleet operators can ensure their vehicles operate at peak efficiency. Cummins’ reputation for quality and reliability further underscores the importance of using genuine parts like the 3958909 Fuel Drain Tube in the maintenance and operation of commercial trucks.

Role of Part 3958909 Fuel Drain Tube in Engine Systems

The Part 3958909 Fuel Drain Tube is an integral component in the fuel system of various engine setups. Its primary function is to facilitate the safe and efficient drainage of fuel from the system, ensuring that any excess or contaminated fuel is removed without compromising the integrity of the fuel lines or the engine itself.

Integration with Fuel Plumbing

In the context of fuel plumbing, the Fuel Drain Tube is strategically positioned to connect with the main fuel lines. This connection allows for the periodic draining of fuel, which is essential for maintenance routines and ensuring that the fuel delivered to the engine is clean and free from contaminants. The tube is designed to interface seamlessly with the fuel lines, minimizing the risk of leaks and ensuring a secure fit.

Role in Overall Plumbing System

Beyond its specific function within the fuel system, the Fuel Drain Tube also plays a part in the broader plumbing network of the engine. It contributes to the overall efficiency and safety of the system by providing a controlled means of fuel removal. This is particularly important in high-stress environments where fuel quality can degrade rapidly, potentially leading to engine performance issues or even failure.

Ensuring System Integrity

The incorporation of the Fuel Drain Tube into the engine’s fuel and plumbing systems underscores the importance of regular maintenance and the need for components that can withstand the demands of continuous operation. By allowing for the safe drainage of fuel, it helps maintain the optimal performance of the engine, ensuring that all components within the fuel and plumbing systems operate within their designed parameters.

Conclusion

The Cummins 3958909 Fuel Drain Tube is a vital component in the fuel system of commercial trucks, ensuring the removal of contaminants and maintaining engine efficiency and reliability. Regular maintenance and proper troubleshooting are essential to prevent engine damage and ensure optimal performance. Cummins’ commitment to quality and reliability makes the 3958909 Fuel Drain Tube a crucial part of maintaining the performance and longevity of commercial trucks.


  1. Wright, G. (n.d.). Fundamentals of Medium-Heavy Duty Diesel Engines. Jones & Bartlett Learning.

  2. Taghavifar, H., & Mardani, A. (2017). Offroad Vehicle Dynamics: Analysis, Modelling and Optimization. Springer International Publishing.

  3. Dempsey, P. (n.d.). Troubleshooting and Repairing Diesel Engines.

SPECIFICATIONS

Package Dimensions
12.5 x 3.0 x 1.125 in
Weight
0.15 lbs
* This information is provided as is and may be out of date. Please contact us or the manufacturer to verify warranty coverage.
* Variable geometry turbocharger and electronic actuator repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after October 1, 2018.
* Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), Selective Catalyst Reduction (SCR) catalyst, and Electronic Control Module (ECM) repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after January 1, 2020.
* These restrictions are only applicable to New parts and ReCon parts coverages for the components listed above sold to a customer in the US or Canada. All other coverages are excluded. All other regions are excluded.