4003940
Flexible Hose
Cummins®

The Cummins 4003940 Flexible Hose is a component designed for use in commercial trucks. It plays a role in the overall operation of heavy-duty vehicles by facilitating the transfer of fluids between various systems. This part is integral to maintaining the efficiency and reliability of truck operations.

Basic Concepts of Flexible Hoses

Flexible hoses are used in automotive systems to connect different components, allowing for movement and vibration without compromising the integrity of the fluid pathways. They are typically employed in applications where rigid connections would be impractical due to the dynamic nature of vehicle operation. Flexible hoses function by providing a durable yet adaptable link between parts, ensuring consistent fluid flow under varying conditions ¹.

Purpose of the Cummins 4003940 Flexible Hose

The Cummins 4003940 Flexible Hose is specifically designed to connect systems within a truck, transporting fluids such as coolant, fuel, or hydraulic fluid. Its role is to ensure a reliable and secure connection between components that may move relative to each other during operation, thus maintaining the efficiency of the truck’s systems.

Key Features

The Cummins 4003940 Flexible Hose is constructed with materials that offer a balance of flexibility and durability. It is designed to withstand the pressures and temperatures associated with its intended applications. The hose’s flexibility allows it to accommodate the movement of connected components, while its durable construction ensures longevity and resistance to wear and tear. Unique characteristics such as reinforced layers or specialized coatings may further enhance its performance in demanding environments ².

Benefits

The Cummins 4003940 Flexible Hose offers several advantages over rigid hoses. It reduces the transmission of vibration between connected components, which can lead to decreased wear on the system. Its flexibility and durability contribute to a longer service life, and its design often allows for easier installation, reducing downtime during maintenance procedures ³.

Installation Considerations

When installing the Cummins 4003940 Flexible Hose, it is important to follow guidelines to ensure proper function and longevity. This includes routing the hose to avoid sharp bends or kinks, securing it in place with appropriate clamps, and ensuring that it is correctly aligned with the components it connects. Attention to these details helps maintain the integrity of the fluid pathways and the overall performance of the truck’s systems.

Maintenance and Troubleshooting

Routine maintenance of the Cummins 4003940 Flexible Hose involves regular inspections for signs of wear, damage, or leaks. Common issues such as leaks or kinks should be addressed promptly to prevent system failure. Maintenance practices may include checking connection points for security, looking for signs of abrasion or cracking on the hose surface, and ensuring that the hose remains free of obstructions.

Safety Considerations

When working with the Cummins 4003940 Flexible Hose, it is important to observe safety protocols. This includes handling fluids with care to avoid spills and ensuring that all connections are secure to prevent leaks. Proper personal protective equipment should be worn when performing maintenance or repairs to protect against potential hazards.

Environmental Impact

The use of flexible hoses like the Cummins 4003940 can have environmental benefits. Materials used in the construction of these hoses may be recyclable, and the design of the hose can help reduce the likelihood of fluid leaks, which can be harmful to the environment. Responsible disposal and recycling practices contribute to minimizing the environmental footprint of automotive components.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and aftermarket parts. With a history of innovation and a commitment to quality, Cummins serves customers in approximately 190 countries and territories, providing reliable and efficient power solutions for a variety of applications.

Compatibility with Cummins Engines

The Cummins Flexible Hose part 4003940 is designed to fit seamlessly with a variety of Cummins engine models. This part is crucial for ensuring the proper functioning and longevity of the engine by providing flexibility and durability in the connection between different components.

ISM Series Engines

• ISM CM570
• ISM CM570/870
• ISM11 CM876 SN

The ISM series engines benefit from the flexible hose part 4003940, which is engineered to handle the specific demands of these models. This hose provides the necessary flexibility to accommodate the engine’s movements and vibrations, ensuring a secure and reliable connection.

L10 Series Engines

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

For the L10 series engines, the part 4003940 is designed to fit perfectly, offering the flexibility required to connect various parts of the engine system. This hose is particularly important in maintaining the integrity of the engine’s performance by preventing leaks and ensuring smooth operation.

M11 Series Engines

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

The M11 series engines also utilize the part 4003940, which is tailored to meet the specific needs of these models. This flexible hose is essential for maintaining the efficiency and reliability of the engine by providing a robust connection that can withstand the rigors of continuous operation.

QSM11 Series Engine

• QSM11 CM570

The QSM11 CM570 engine is another model that is compatible with the part 4003940. This hose is designed to fit this engine model, ensuring that all connections are secure and flexible, which is critical for the engine’s overall performance and durability.

Role of Part 4003940 Flexible Hose in Engine Systems

The part 4003940 Flexible Hose is an integral component in various engine systems, facilitating the efficient transfer of fluids while accommodating the dynamic movements and vibrations inherent in engine operation.

In systems involving resistors, the flexible hose ensures a secure and reliable connection between the resistor and other components, such as sensors or control units. This connection is vital for maintaining consistent electrical resistance, which is essential for accurate sensor readings and effective control of engine parameters. The flexibility of the hose allows it to withstand the thermal expansion and contraction that occur during engine operation, ensuring a durable and long-lasting connection.

When addressing corrosion, the flexible hose plays a significant role in protecting sensitive components from corrosive agents. By providing a barrier between corrosive fluids and metal components, the hose helps prevent the degradation of parts over time. This is particularly important in environments where engines are exposed to salt, moisture, or other corrosive elements. The hose’s material is typically selected for its resistance to corrosion, further enhancing its protective capabilities.

Overall, the 4003940 Flexible Hose contributes to the reliability and efficiency of engine systems by ensuring secure fluid transfer, accommodating mechanical movements, and protecting components from corrosive damage.

Conclusion

The Cummins 4003940 Flexible Hose is a vital component in the operation of commercial trucks and various Cummins engine models. Its design ensures efficient fluid transfer, accommodates engine movements and vibrations, and protects components from corrosion. Proper installation, maintenance, and adherence to safety protocols are essential for maximizing the performance and longevity of this part.