3944381
Breather Element
Cummins®

The Cummins 3944381 Breather Element is a component designed to facilitate the proper functioning of commercial trucks. Its role is to allow air to enter and exit the engine’s crankcase, maintaining a balanced pressure and preventing the buildup of contaminants. This balance is significant for the overall operation and longevity of the truck’s engine ¹.

Basic Concepts of Breather Elements

A breather element is a device installed in the crankcase of an engine. Its function is to regulate the airflow within the system, allowing for the escape of gases and moisture while preventing the ingress of contaminants. The principle behind its operation is to maintain a stable pressure within the crankcase, which is crucial for the efficient operation of the engine ².

Purpose of the 3944381 Breather Element

The 3944381 Breather Element plays a role in the operation of a truck by ensuring that the crankcase maintains an optimal pressure level. This is achieved by allowing air to flow in and out as needed, which helps in expelling moisture and gases produced during engine operation. By doing so, it contributes to the integrity and performance of the engine system.

Key Features

The 3944381 Breather Element is constructed with materials that offer durability and efficiency. Its design includes elements that enhance its ability to filter out contaminants while allowing for the necessary airflow. Unique characteristics such as its filtration efficiency and robust construction are integral to its performance.

Benefits

The use of the 3944381 Breather Element offers several advantages, including improved system efficiency through proper pressure regulation. It also contributes to the longevity of engine components by preventing the accumulation of contaminants. Overall, it enhances the performance of the truck by ensuring the engine operates under optimal conditions.

Installation Process

Installing the 3944381 Breather Element requires following a series of steps to ensure it is correctly fitted. This includes preparing the area, using the appropriate tools for installation, and verifying that the element is securely in place. Best practices during installation help in achieving the desired performance and longevity of the component.

Maintenance Tips

Regular maintenance of the 3944381 Breather Element is recommended to ensure it continues to perform optimally. This includes periodic inspections to check for any signs of wear or contamination. Cleaning procedures may also be necessary to remove any accumulated debris, ensuring the breather element functions effectively.

Troubleshooting Common Issues

Common problems associated with the 3944381 Breather Element can include reduced airflow or contamination buildup. Identifying the cause of these issues, whether it be a blockage or damage to the element, is the first step in resolving them. Suggested solutions may involve cleaning, repair, or replacement of the breather element.

Regulatory Compliance

The use of the 3944381 Breather Element in commercial trucks is subject to certain regulatory standards. These standards ensure that the component meets safety and performance criteria. Compliance with these regulations is important for the operation of commercial vehicles, ensuring they meet the required operational standards.

Environmental Impact

The environmental considerations associated with the 3944381 Breather Element include its design for durability and efficiency, which can reduce the need for frequent replacements. Additionally, any eco-friendly features or recycling options available for the component contribute to minimizing its environmental footprint.

About Cummins

Cummins Inc. is a leader in the design, manufacture, and distribution of engines, filtration, and power generation products. With a history of innovation and a commitment to quality, Cummins serves commercial, industrial, and automotive markets worldwide. The company’s product range includes a variety of components designed to enhance the performance and efficiency of engines.

Cummins Breather Element 3944381 Compatibility

The Cummins Breather Element 3944381 is designed to fit a variety of Cummins engines, ensuring optimal performance and longevity. This part is crucial for maintaining the integrity of the engine’s crankcase ventilation system by preventing contaminants from entering and allowing excess pressure to escape.

Compatible Engines

• 4B3.9
• 6B5.9
• ISB CM550
• ISL G CM2180
• ISX CM570
• QSB5.9 44 CM550
• VTA903 CM2250 V105

Grouping of Compatible Engines

The Cummins Breather Element 3944381 is engineered to fit within the following groups of engines:

• 4B3.9 and 6B5.9: These engines are part of the smaller Cummins engine lineup, often used in various industrial and agricultural applications.
• ISB CM550, ISL G CM2180, and ISX CM570: These engines belong to the Cummins Industrial Series, known for their robust performance in heavy-duty applications.
• QSB5.9 44 CM550: This engine is part of the Cummins QSB series, which is designed for both industrial and marine applications.
• VTA903 CM2250 V105: This engine is part of the Cummins VTA series, which is tailored for marine and heavy-duty applications.

Role of Part 3944381 Breather Element in Engine Systems

The Part 3944381 Breather Element is an essential component in the efficient operation of various engine systems. It is strategically integrated into the engine’s breather arrangement to manage the circulation and expulsion of gases within the crankcase.

Integration with Key Components

1. Oil Fill and Breather System: The breather element works in conjunction with the oil fill system to ensure that the crankcase maintains optimal pressure. It allows for the release of gases generated during combustion, preventing pressure build-up that could lead to oil leaks or reduced engine performance.

2. Crankcase Ventilation: Within the crankcase, the breather element is part of the crankcase breather system. It facilitates the venting of gases produced by the piston rings and valve guides, which if not properly managed, could contaminate the oil or cause sludge formation.

3. Breather Kit and Covers: The breather element is often included in breather kits designed to enhance the engine’s ventilation system. It fits into various covers, such as the cylinder block cover, hand hole cover, and valve cover, ensuring a sealed yet ventilated environment.

4. Side Oil Catch Arrangement: In systems equipped with a side oil catch, the breather element directs gases away from the oil, reducing the risk of oil contamination. This setup is particularly beneficial in high-performance engines where oil cleanliness is paramount.

5. Tachometer and Drive Systems: Although indirectly related, the efficient operation of the breather element contributes to the overall engine health, which in turn affects components like the tachometer and drive systems. A well-ventilated crankcase ensures smoother engine operation, which is critical for accurate tachometer readings and consistent drive performance.

Conclusion

In summary, the Part 3944381 Breather Element is a vital component that ensures the proper functioning of the engine’s ventilation system, directly impacting the performance and longevity of the engine.