3934720
Elbow Hose
Cummins®

The 3934720 Elbow Hose, manufactured by Cummins, is a component used in commercial trucks. It is part of the fluid transfer systems within these vehicles. Elbow hoses, in general, facilitate the movement of fluids by providing a bend in the hose line, which allows for more flexible routing around the engine and other components.

Basic Concepts of Elbow Hoses

An elbow hose is a type of hose that incorporates a bend, allowing it to change direction within a fluid transfer system. This design is particularly useful in the confined spaces of a truck’s engine compartment, where direct routing may not be feasible. The hose operates by maintaining a seal and providing a pathway for fluids such as coolant, oil, or air to travel between components ¹.

Purpose of the 3934720 Elbow Hose

This Cummins part is designed to connect specific systems within a truck, enabling the transfer of fluids between them. It plays a role in ensuring that fluids reach their intended destinations within the truck’s systems, contributing to the overall functionality and efficiency of the vehicle.

Key Features

The 3934720 is constructed with features that enhance its performance. These include a specific material composition that provides durability and resistance to the fluids it transports, a bend radius that allows for flexible installation, and connection types that ensure a secure fit within the truck’s system.

Benefits

This part offers several advantages. Its durable construction allows it to withstand the pressures and temperatures associated with truck systems. It is designed to resist wear and tear, ensuring long-term reliability. Additionally, its compatibility with truck systems ensures seamless integration and operation.

Installation Considerations

Proper installation of the 3934720 is important for its performance and longevity. This involves ensuring that the hose is correctly routed, securely connected, and free from kinks or sharp bends that could impede fluid flow or cause damage to the hose.

Troubleshooting Common Issues

Elbow hoses, including the 3934720, may encounter issues such as leaks or blockages. These can often be identified through visual inspection or by monitoring the system’s performance. Troubleshooting steps may involve checking connections, inspecting the hose for damage, and ensuring that the routing does not place undue stress on the hose.

Maintenance Tips

Regular maintenance of the 3934720 can help prolong its life. This includes periodic inspections for signs of wear, ensuring connections remain secure, and replacing the hose if it shows signs of degradation or failure. Adhering to manufacturer-recommended inspection intervals can aid in early detection of potential issues.

Cummins: A Brief Overview

Cummins is a well-established manufacturer in the commercial truck industry, known for its range of products that include engines, powertrains, and components. The company has a history of innovation and quality, which is reflected in its product offerings and its reputation within the industry ².

Compatibility of Elbow Hose Part 3934720 with Cummins Engines

The Elbow Hose part number 3934720, manufactured by Cummins, is designed to fit seamlessly with a range of Cummins engines. This part is crucial for maintaining the integrity of the engine’s cooling and exhaust systems, ensuring efficient operation and longevity of the engine.

4B3.9 Engine

The 4B3.9 engine benefits from the precise fit and durability of the 3934720. This part is engineered to connect various hoses and components, ensuring that the engine’s cooling and exhaust systems function optimally.

ISF2.8 CM2220 F129 Engine

Similarly, the ISF2.8 CM2220 F129 engine also utilizes the 3934720 to maintain the efficiency of its cooling and exhaust systems. This part is specifically designed to fit the unique configuration of the ISF2.8 CM2220 F129 engine, ensuring that all connections are secure and leak-free.

Grouping of Engines

Both the 4B3.9 and ISF2.8 CM2220 F129 engines share a commonality in their use of the 3934720. This part is designed to fit these engines perfectly, ensuring that the connections between various hoses and components are secure and efficient.

Role of Part 3934720 Elbow Hose in Engine Systems

The 3934720 is an essential component in various engine systems, facilitating the efficient transfer of fluids and gases. Its applications span across several key components, each playing a distinct role in the overall functionality of the engine.

Breather Systems

In breather systems, the 3934720 is utilized to manage the flow of air into and out of the crankcase. This helps maintain optimal pressure levels, ensuring that the engine operates smoothly.

Crankcase Ventilation

Within the crankcase ventilation system, the 3934720 connects various passages that allow for the circulation of air. This ventilation is vital for removing blow-by gases—a mixture of air, fuel, and combustion byproducts—that can build up inside the crankcase.

Plumbing Networks

In the broader context of engine plumbing, the 3934720 serves as a versatile connector between different sections of the plumbing network. It ensures that fluids such as coolant, oil, and fuel are directed accurately to their respective destinations.

Aftercooler Water Systems

For engines equipped with aftercoolers, the 3934720 plays a significant role in the aftercooler water system. It aids in the circulation of water through the aftercooler, which is designed to reduce the temperature of compressed air before it enters the engine.

Conclusion

The 3934720 Elbow Hose by Cummins is a vital component in the fluid transfer systems of commercial trucks, particularly in the context of Cummins engines. Its design, featuring a durable material composition, appropriate bend radius, and secure connection types, ensures efficient and reliable fluid transfer across various engine systems. Proper installation, regular maintenance, and timely troubleshooting are essential for maximizing the performance and longevity of this part. Cummins’ commitment to quality and innovation is evident in the design and functionality of the 3934720, making it a reliable choice for maintaining the efficiency and reliability of truck engines.