3930806
Plain Hose
Cummins®

Introduction

The Cummins 3930806 Plain Hose is a component designed for use in commercial truck systems. It serves as a conduit for the transfer of fluids within the truck’s various systems, ensuring the efficient operation of critical functions. This hose is integral to maintaining the performance and reliability of the truck’s systems by providing a durable and flexible connection between components .

Basic Concepts of Plain Hoses

Plain hoses are flexible tubes used in fluid transfer systems across various industries, including automotive and heavy-duty trucking. Their primary function is to transport fluids such as coolant, fuel, oil, and hydraulic fluids between different parts of a system. Plain hoses are typically constructed from materials like rubber, synthetic polymers, or a combination of both, chosen for their flexibility, resistance to wear and tear, and compatibility with the fluids they carry .

Purpose of the Cummins 3930806 Plain Hose

The Cummins 3930806 Plain Hose plays a specific role in the operation of a truck by facilitating the transfer of fluids within the engine cooling system and other related systems. It is designed to withstand the pressures and temperatures associated with these fluids, ensuring a reliable connection that contributes to the overall efficiency and performance of the truck .

Key Features

The Cummins 3930806 Plain Hose is characterized by its robust design and construction materials, which include high-quality rubber and synthetic compounds. These materials are selected for their ability to resist degradation from exposure to various fluids and environmental conditions. The hose’s design also incorporates features that enhance its flexibility and durability, allowing it to perform effectively in the demanding conditions encountered in commercial truck operations .

Benefits

The use of the Cummins 3930806 Plain Hose offers several advantages in truck operations. Its durable construction and resistance to wear and tear contribute to improved efficiency and reliability. The hose’s flexibility allows for easy installation and maintenance, reducing downtime and operational costs. Additionally, its compatibility with a wide range of fluids ensures versatile application across different truck systems .

Installation Considerations

When installing the Cummins 3930806 Plain Hose, it is important to follow guidelines and best practices to ensure compatibility with other system components and to achieve optimal performance. This includes using the necessary tools and procedures to secure the hose in place and to check for proper alignment and connection integrity. Careful attention to these details helps prevent leaks and ensures the hose operates within its designed parameters .

Troubleshooting and Maintenance

Common issues with the Cummins 3930806 Plain Hose may include leaks, cracks, or degradation due to exposure to harsh conditions. Diagnostic steps for identifying problems involve visual inspection for signs of wear, checking for proper connection and alignment, and testing for leaks. Regular maintenance practices, such as cleaning the hose and inspecting it for damage, can help ensure longevity and optimal performance .

Performance in Various Conditions

The Cummins 3930806 Plain Hose is designed to perform under a range of operating conditions, including extreme temperatures, high pressure, and corrosive environments. Its construction materials and design features allow it to withstand these challenges, maintaining its integrity and functionality. This ensures that the hose can continue to provide reliable fluid transfer in the demanding conditions encountered in commercial truck operations .

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 is committed to quality and innovation in the automotive industry. Its product range includes engines, powertrains, and related components designed for efficiency, reliability, and performance in a variety of applications, from on-highway to off-highway and industrial uses .

Integration with Cummins Engines

The Cummins part 3930806, a Plain Hose, is designed to integrate seamlessly with several engine models. This hose is a critical component in the engine’s cooling and fuel systems, ensuring efficient operation and longevity of the engine.

4B3.9 and 6C8.3 Engines

The Plain Hose 3930806 is specifically engineered to fit the 4B3.9 and 6C8.3 engines. These engines are known for their robust performance and reliability, often used in heavy-duty applications. The hose connects various parts of the engine, facilitating the flow of coolant and other fluids, which is essential for maintaining optimal engine temperature and preventing overheating .

QSB4.5 CM850 (CM2850) Engines

Similarly, the 3930806 Plain Hose is also compatible with the QSB4.5 CM850 (CM2850) engines. These engines are part of Cummins’ QSB series, which is renowned for its versatility and efficiency. The hose’s design ensures it can withstand the high pressures and temperatures associated with these engines, providing a reliable connection that supports the engine’s overall functionality .

Functionality and Importance

The Plain Hose 3930806 plays a crucial role in the engine’s operation by ensuring that fluids are transported efficiently and securely. Its design allows for flexibility and durability, making it suitable for the demanding conditions these engines operate under. Proper installation and maintenance of this hose are vital to prevent leaks and ensure the engine runs smoothly .

Compatibility and Usage

This hose is a standard component in the maintenance and repair kits for the mentioned engines. Technicians and mechanics should ensure that the hose is correctly aligned and securely fastened to avoid any disruptions in fluid flow, which could lead to engine damage .

Role of Part 3930806 Plain Hose in Engine Systems

The 3930806 Plain Hose is a versatile component utilized in various engine systems to facilitate the transfer of fluids. Its application spans across several key components, ensuring efficient operation and maintenance of the engine.

Fuel System Integration

In the fuel system, the 3930806 Plain Hose is often employed to connect the fuel filter to the fuel supply tube. This connection is vital for maintaining a consistent fuel flow from the tank to the engine. The hose’s flexibility allows it to accommodate the movements and vibrations inherent in engine operation, reducing the risk of leaks and ensuring a stable fuel supply .

Fuel Drain Location

At the fuel drain location, the 3930806 Plain Hose plays a significant role in facilitating the safe and efficient draining of fuel. This is particularly important during maintenance procedures where fuel system purging is required. The hose’s design ensures that fuel can be drained without spillage, enhancing safety and convenience during servicing .

Plumbing and Flexible Hose Applications

In the broader context of engine plumbing, the 3930806 Plain Hose serves as a reliable connector between various components. Its use as a flexible hose allows for the creation of custom routing paths, accommodating the complex layouts of modern engine compartments. This flexibility is essential in navigating around other components and ensuring that the hose does not become a stress point in the system .

Summary of Component Interactions

• Fuel Filter: The hose connects the fuel filter to other components, ensuring clean fuel is delivered to the engine.
• Fuel Supply Tube: It links the fuel supply tube to the fuel filter, maintaining a consistent fuel flow.
• Plumbing: Utilized in engine plumbing to create custom fluid pathways.
• Fuel Drain Location: Aids in the safe draining of fuel during maintenance.

The 3930806 Plain Hose is an integral part of the engine’s fluid management system, contributing to the overall efficiency and reliability of the engine .

Conclusion

The Cummins 3930806 Plain Hose is a critical component in the efficient operation of commercial truck systems. Its robust design, durable materials, and versatile application make it essential for maintaining the performance and reliability of truck engines. Proper installation, maintenance, and understanding of its role in various engine systems are key to ensuring optimal functionality and longevity of the engine .

: Automotive Fuels Reference Book, Paul Richards and Jim Barker, SAE International, 2023.
: Diesel Engine Management Systems and Components, Konrad Reif Ed, Springer Vieweg, 2014.
: Pistons and Engine Testing, Wolf-Henning Schneider, Springer Nature, 2016.