3930860
Crankshaft Adapter
Cummins®

Introduction

The Fuel Supply Tube 3930860, manufactured by Cummins, is a critical component in the fuel systems of heavy-duty trucks. This part ensures a consistent and reliable fuel supply from the tank to the engine, which is essential for the engine’s operation.

Basic Concepts of Fuel Supply Tubes

A fuel supply tube is a conduit within the fuel system that transports fuel from the storage tank to the engine. Its function is vital to the engine’s operation, ensuring that fuel is delivered under the correct pressure and in the right quantity to support combustion. The efficiency and reliability of this component directly influence the overall performance and efficiency of the truck’s engine ¹.

Purpose of the 3930860 Fuel Supply Tube

The 3930860 Fuel Supply Tube is designed to deliver fuel from the tank to the engine in heavy-duty trucks. It maintains the fuel system’s integrity by providing a secure and efficient pathway for fuel, ensuring that the engine receives a steady supply necessary for optimal performance and efficiency.

Key Features

This Cummins part is constructed from materials that offer durability and resistance to the corrosive effects of fuel. Its design includes features that enhance its performance, such as precise engineering for a snug fit within the fuel system and smooth internal surfaces to facilitate efficient fuel flow. These characteristics contribute to the tube’s longevity and reliability in demanding applications ².

Benefits

Utilizing the 3930860 Fuel Supply Tube can lead to improved fuel delivery efficiency, supporting better engine performance. Its durable construction ensures longevity, reducing the need for frequent replacements. Additionally, the efficient design of the tube contributes to the overall reliability of the fuel system, potentially leading to enhanced engine performance and fuel economy.

Installation and Compatibility

Proper installation of the 3930860 Fuel Supply Tube involves following manufacturer guidelines to ensure it is securely fitted within the fuel system. This includes verifying that all connections are tight and that the tube is correctly positioned to avoid kinks or obstructions that could impede fuel flow. Compatibility with specific truck models and engine types should be confirmed to ensure optimal performance and integration within the fuel system.

Maintenance and Troubleshooting

Routine maintenance of the 3930860 Fuel Supply Tube includes regular inspections for signs of wear, corrosion, or damage. Cleaning the tube and its connections can prevent buildup that might obstruct fuel flow. Common issues such as leaks or reduced fuel pressure can often be traced back to the fuel supply tube. Troubleshooting steps may involve checking for proper installation, inspecting for damage, and ensuring all connections are secure. Recommended solutions include repairing or replacing damaged sections to restore efficient fuel delivery ³.

Safety Considerations

When working with the fuel supply system and the 3930860 Fuel Supply Tube, it is important to observe safety guidelines to prevent accidents. This includes working in a well-ventilated area, avoiding open flames or sparks near the fuel system, and wearing appropriate personal protective equipment. Potential hazards such as fuel spills or leaks should be addressed immediately to mitigate risks.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the automotive industry, particularly for its heavy-duty truck components. The company’s commitment to excellence is reflected in its wide range of products, which are designed to meet the demanding requirements of various applications.

Cummins Fuel Supply Tube 3930860 Compatibility

The Cummins Fuel Supply Tube part number 3930860 is designed to fit seamlessly with several engine models, ensuring optimal fuel delivery and engine performance. This part is integral to the fuel system, facilitating the transfer of fuel from the fuel tank to the engine’s fuel injection system.

Compatible Engines

• 4B3.9
• 6B5.9

These engines, while differing in their specifications and applications, share a commonality in their fuel system architecture, making the 3930860 Fuel Supply Tube a versatile component across these models.

The 3930860 part is engineered to meet the stringent requirements of both the 4B3.9 and 6B5.9 engines, ensuring durability and reliability in various operational conditions. Its design allows for precise fuel flow, which is critical for maintaining engine efficiency and performance.

Role of Part 3930860 Fuel Supply Tube in Engine Systems

The Fuel Supply Tube (part 3930860) is an integral component in the fuel delivery system of various engine setups. Its primary function is to transport 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 systems equipped with an adapter, the Fuel Supply Tube connects to this component to facilitate the transition between different diameters or types of fuel lines. This connection is vital for maintaining the integrity of the fuel flow and preventing leaks.

When integrated with the front drive mechanism, the Fuel Supply Tube must be routed carefully to avoid interference with the drive components. This routing is important to ensure that the fuel line remains undamaged during the operation of the front drive, thus maintaining a steady fuel supply to the engine.

In engines that incorporate a damper to reduce vibrations, the Fuel Supply Tube is often secured in a manner that minimizes movement. This is to prevent fatigue or damage to the tube, which could lead to fuel leaks or inconsistent fuel delivery.

Similarly, in systems where a vibration isolator is used, the Fuel Supply Tube is typically mounted in a way that isolates it from excessive vibrations. This isolation helps in prolonging the lifespan of the tube and ensuring a stable fuel supply, even under demanding operational conditions.

Conclusion

The 3930860 Fuel Supply Tube by Cummins plays a crucial role in ensuring the efficient and reliable delivery of fuel to heavy-duty truck engines. Its durable construction, precise engineering, and compatibility with various engine models make it a vital component in the fuel system. Proper installation, maintenance, and adherence to safety guidelines are essential to maximize the performance and longevity of this part.