3970656
Fuel Supply Tube
Cummins®

Introduction

The Cummins 3970656 Fuel Supply Tube is a critical component in heavy-duty trucks, facilitating the transfer of fuel from the tank to the engine. This part ensures a consistent and reliable fuel supply, which is essential for optimal engine performance and efficiency.

Basic Concepts of Fuel Supply Tubes

A Fuel Supply Tube is a conduit in the fuel system that carries fuel from the storage tank to the engine. It provides a direct and unobstructed pathway for fuel, ensuring the engine receives the necessary amount for combustion. The efficiency and reliability of this tube are crucial for the overall performance and efficiency of the engine, as it ensures consistent and contaminant-free fuel delivery ¹.

Purpose of the Cummins 3970656 Fuel Supply Tube

The Cummins 3970656 Fuel Supply Tube is designed to deliver fuel efficiently from the tank to the engine in heavy-duty trucks. It maintains the fuel system’s integrity by providing a secure and reliable connection between the fuel tank and the engine, ensuring smooth and efficient engine operation with minimal risk of fuel delivery issues.

Key Features

This Cummins part is constructed from durable materials that resist the corrosive effects of fuel. Its design includes reinforced connections and a smooth interior to facilitate fuel flow, contributing to the tube’s performance and longevity under the demands of heavy-duty truck operation.

Benefits

The Cummins 3970656 Fuel Supply Tube offers improved fuel delivery efficiency and enhanced durability. By providing a reliable pathway for fuel, it contributes to the engine’s performance and reliability. Its robust construction ensures it can withstand the rigors of heavy-duty use, offering long-term value and performance.

Installation and Integration

Installing this part involves connecting it to the fuel tank and the engine’s fuel system. This process requires careful attention to ensure all connections are secure and the tube is properly aligned within the system. Specific requirements may include the use of compatible fittings and adherence to manufacturer guidelines to ensure proper fit and function.

Maintenance and Troubleshooting

Regular maintenance of the Cummins 3970656 Fuel Supply Tube includes inspecting it for signs of wear, damage, or leaks. Common issues may involve blockages or corrosion, which can affect fuel delivery. Troubleshooting tips include checking for proper alignment and connection integrity, as well as ensuring the tube is free from obstructions that could impede fuel flow.

Compatibility and Application

The Cummins 3970656 Fuel Supply Tube is designed for use in specific models and series of heavy-duty trucks. Its application is tailored to fit within the fuel systems of these vehicles, ensuring compatibility and optimal performance. Understanding the specific trucks and engines for which this tube is intended is important for ensuring proper installation and function.

Safety Considerations

When handling and installing the Cummins 3970656 Fuel Supply Tube, it is important to follow safety protocols to prevent fuel leaks and ensure safe operation. This includes working in a well-ventilated area, using appropriate personal protective equipment, and ensuring all connections are secure to prevent fuel spills or leaks.

Cummins Overview

Cummins Inc. is a well-established company in the automotive and heavy-duty truck industry, known for its commitment to quality and innovation in engine components. With a history of developing reliable and efficient engine parts, Cummins has built a reputation for excellence and durability in the components it produces, including the 3970656 Fuel Supply Tube.

Cummins Engine Compatibility with Fuel Supply Tube Part 3970656

The Cummins Fuel Supply Tube part number 3970656 is designed to fit a variety of Cummins engines, ensuring a secure and efficient fuel supply system. Here is a detailed breakdown of its compatibility with the listed engines:

ISC Series Engines

• ISC CM2150
• ISC8.3 CM2250

This part is compatible with the ISC series engines, including the ISC CM2150 and ISC8.3 CM2250. It is integral to maintaining the proper fuel flow within these engines, ensuring optimal performance and efficiency.

ISL Series Engines

• ISL CM2150
• ISL9 CM2150 SN
• ISL9 CM2250

For the ISL series engines, this part is also a suitable fit. This includes the ISL CM2150, ISL9 CM2150 SN, and ISL9 CM2250. It ensures that the fuel supply system operates smoothly, contributing to the overall reliability and power of these engines.

QSC and QSL Series Engines

• QSC8.3 CM850 (CM2850)
• QSL8.9 CM2150 L141
• QSL9 CM850 (CM2850)

This part is also compatible with the QSC and QSL series engines. This includes the QSC8.3 CM850 (CM2850), QSL8.9 CM2150 L141, and QSL9 CM850 (CM2850). It is essential for maintaining the integrity of the fuel supply system in these engines, ensuring they run efficiently and reliably.

By ensuring that the Fuel Supply Tube part 3970656 is correctly installed, engine owners can maintain the performance and longevity of their engines, avoiding potential issues related to fuel delivery.

Role of Part 3970656 Fuel Supply Tube in Engine Systems

The Part 3970656 Fuel Supply Tube is a critical component in the fuel delivery system of various engine setups. It is responsible for transporting fuel from the fuel tank to the fuel filter and subsequently to the engine’s fuel injection system or carburetor.

Integration with Plumbing

In the context of engine plumbing, the Fuel Supply Tube interfaces with the fuel lines that run throughout the vehicle. It ensures a consistent and reliable flow of fuel, minimizing the risk of fuel starvation or leaks. The tube is typically connected to the fuel tank at one end and to the fuel filter at the other, forming a vital link in the fuel delivery chain.

Interaction with Fuel Filter

The Fuel Supply Tube plays a significant role in conjunction with the fuel filter. As fuel travels through the tube, it is directed into the fuel filter, where contaminants and impurities are removed. This purified fuel then proceeds to the engine, ensuring optimal performance and longevity of the fuel injectors or carburetor. The tube’s design allows for efficient fuel transfer, reducing the likelihood of blockages or restrictions that could impair engine function.

Conclusion

The Cummins 3970656 Fuel Supply Tube is a vital component in the fuel system of heavy-duty trucks, ensuring a consistent and reliable fuel supply to the engine. Its durable construction, efficient design, and compatibility with various Cummins engines make it an essential part for maintaining engine performance and reliability. Proper installation, regular maintenance, and adherence to safety protocols are crucial for maximizing the benefits of this part.