3970402
Plain Hose
Cummins®

The Cummins 3970402 Fuel Supply Hose is a component designed for use in the fuel systems of heavy-duty trucks. Its purpose is to facilitate the transfer of fuel from the tank to the engine, ensuring a consistent and reliable fuel supply that is vital for the truck’s operation. This Cummins part is engineered to withstand the demanding conditions present in heavy-duty applications, providing a durable and efficient solution for fuel delivery ².

Basic Concepts of Fuel Supply Hoses

A fuel supply hose is a flexible conduit used in the fuel delivery system to transport fuel from the tank to the engine. Its function is to provide a secure and leak-free pathway for fuel, accommodating the movement and vibrations inherent in vehicle operation. Fuel supply hoses are typically constructed from materials such as rubber, reinforced with textile or wire, to offer flexibility, strength, and resistance to fuel and environmental factors ¹.

Purpose and Role in Truck Operation

The 3970402 Fuel Supply Hose plays a specific role in the operation of a truck by enabling the efficient transfer of fuel from the tank to the engine. This hose is positioned within the fuel system to connect various components, ensuring that fuel is delivered under pressure and in the correct volume to meet the engine’s demands. Its design and materials are selected to handle the pressures and temperatures encountered in heavy-duty truck applications, contributing to the overall performance and reliability of the vehicle ².

Key Features

The 3970402 Fuel Supply Hose features a design and construction that enhance its performance and durability. It is made from high-quality materials that offer resistance to fuel, abrasion, and environmental conditions. The hose may include reinforcements such as textile or wire to provide additional strength and flexibility. Unique attributes, such as specialized end fittings or a specific inner diameter, are designed to optimize fuel flow and compatibility with the fuel system components ².

Benefits

The 3970402 Fuel Supply Hose offers several benefits that contribute to the efficient and reliable operation of heavy-duty trucks. These include improved fuel efficiency through a consistent and leak-free fuel supply, reduced risk of fuel leaks due to its durable construction, and enhanced durability under high-stress conditions, ensuring long-term performance and reliability ².

Installation Considerations

Proper installation of the 3970402 Fuel Supply Hose is important for ensuring its effectiveness and longevity. Considerations include compatibility with other fuel system components, such as fittings and clamps, to ensure a secure and leak-free connection. Best practices for securing and routing the hose involve minimizing kinks and sharp bends, which can impede fuel flow or cause damage to the hose over time ².

Troubleshooting Common Issues

Common issues that may arise with fuel supply hoses include leaks, blockages, or degradation due to exposure to fuel or environmental conditions. Troubleshooting steps to diagnose and resolve these problems involve inspecting the hose for signs of wear or damage, checking connections for leaks, and ensuring that the hose is properly routed and secured. Replacement or repair may be necessary if issues are identified ².

Maintenance Tips

Regular maintenance of the 3970402 Fuel Supply Hose is important for prolonging its lifespan and ensuring reliable operation. Inspection intervals should be established based on the manufacturer’s recommendations or the operating conditions of the truck. Signs of wear or damage, such as cracks, swelling, or abrasions, should be addressed promptly. Best practices for maintenance include keeping the hose clean, avoiding exposure to harmful chemicals, and ensuring that all connections are secure and leak-free ².

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for quality, reliability, and innovation in the automotive and heavy-duty truck industry. The company’s product range includes a variety of engines, components, and systems designed to meet the demanding requirements of heavy-duty applications ³.

Cummins Fuel Supply Hose 3970402 Compatibility

The Cummins Fuel Supply Hose part number 3970402 is designed to fit seamlessly with several engine models, ensuring efficient fuel delivery and maintaining the engine’s performance. This hose is integral to the fuel system, connecting various components to facilitate the proper flow of fuel.

QSB7 Series

The QSB7 series engines, known for their robust performance and reliability, are compatible with the 3970402 fuel supply hose. This hose is engineered to withstand the demanding conditions these engines operate under, ensuring a consistent and reliable fuel supply.

CM2880 Series

The CM2880 series engines benefit from the precise engineering of the 3970402 fuel supply hose. This part is designed to integrate smoothly with the CM2880 engines, providing a secure and efficient connection that is crucial for optimal engine performance.

B117 Series

The B117 series engines also utilize the 3970402 fuel supply hose. This hose is crafted to meet the specific requirements of the B117 engines, ensuring that fuel is delivered accurately and efficiently, which is essential for maintaining the engine’s power and efficiency.

Grouping for Compatibility

The 3970402 fuel supply hose is designed with compatibility in mind, ensuring it fits well with the QSB7, CM2880, and B117 series engines. This compatibility is achieved through meticulous design and engineering, making it a versatile component that can be used across multiple engine models without compromising performance ³.

Conclusion

The Cummins 3970402 Fuel Supply Hose is a critical component in the fuel systems of heavy-duty trucks, designed to ensure a consistent and reliable fuel supply. Its high-quality construction, compatibility with various engine models, and the benefits it offers in terms of fuel efficiency and durability make it an essential part for maintaining the performance and reliability of heavy-duty vehicles.