4966939
Breather Tube
Cummins®

The Cummins 4966939 Breather Tube is a component designed to facilitate the ventilation of the crankcase in heavy-duty trucks. Its role is significant in ensuring the engine operates efficiently and maintains optimal performance over time. This breather tube is part of the broader system that manages the air and gases within the engine compartment, contributing to the overall health and longevity of the truck’s engine ².

Basic Concepts of Breather Tubes

A breather tube serves as a conduit for the release of gases and moisture that accumulate within the engine’s crankcase. This process is vital for maintaining a clean and dry environment inside the crankcase, which helps prevent the formation of sludge and reduces the risk of engine wear. By allowing these byproducts to escape, the breather tube plays a role in the engine system by ensuring that the internal components are not exposed to excessive pressure or contamination ⁴.

Purpose of the 4966939 Breather Tube

The Cummins 4966939 Breather Tube is specifically engineered to integrate into the crankcase ventilation system of heavy-duty trucks. Its function is to allow the escape of gases and moisture that are produced during engine operation. This ventilation is important for maintaining the integrity of the engine oil and the overall efficiency of the engine. By facilitating the removal of these byproducts, the breather tube contributes to a stable operating environment within the crankcase ³.

Key Features

The Cummins 4966939 Breather Tube is constructed with durability and performance in mind. It is made from high-quality materials that are resistant to the harsh conditions found within an engine compartment. The design of the tube ensures a secure fit and efficient operation, with features that enhance its ability to perform under various driving conditions. These attributes contribute to the breather tube’s reliability and effectiveness in heavy-duty applications ¹.

Benefits of Using the 4966939 Breather Tube

Incorporating the Cummins 4966939 Breather Tube into a truck’s engine system offers several advantages. It contributes to improved engine performance by ensuring that the crankcase remains free of excess gases and moisture. This can lead to reduced maintenance needs, as a well-ventilated crankcase is less likely to experience issues such as oil contamination or sludge buildup. Additionally, the breather tube’s durable construction enhances the overall durability of the engine system ².

Installation and Compatibility

Proper installation of the Cummins 4966939 Breather Tube is important for ensuring its effective operation. Installation procedures may vary slightly depending on the specific truck model, so it is important to follow the manufacturer’s guidelines closely. This may include ensuring a secure fit and proper alignment with the crankcase ventilation system. Attention to these details during installation can help prevent issues down the line and ensure the breather tube functions as intended ³.

Maintenance and Troubleshooting

Regular maintenance of the Cummins 4966939 Breather Tube is important for its continued effective operation. This includes periodic inspections to check for signs of wear or damage, as well as cleaning the tube to remove any accumulated debris. Troubleshooting common issues, such as blockages or leaks, can often be addressed through simple cleaning or, in some cases, replacement of the tube. Keeping the breather tube in good condition is important for the overall health of the engine ⁴.

Common Issues and Solutions

Breather tubes, including the Cummins 4966939, may encounter issues such as blockages or leaks over time. Blockages can occur due to the accumulation of debris or sludge, while leaks may result from wear or damage to the tube. Addressing these issues promptly is important to maintain the efficiency of the crankcase ventilation system. Solutions may involve cleaning the tube, repairing any damage, or replacing the tube if necessary ¹.

Performance Impact

The Cummins 4966939 Breather Tube plays a role in influencing the overall performance and efficiency of a truck’s engine. By ensuring proper ventilation of the crankcase, it contributes to maintaining optimal engine oil condition and reducing the risk of engine wear. This can have a positive impact on fuel economy and emission levels, as a well-maintained engine operates more efficiently ².

Cummins Corporation 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 a commitment to quality, Cummins has established a strong reputation in the automotive industry. The company’s product range includes a variety of components and systems designed to enhance the performance and reliability of vehicles. The Cummins 4966939 Breather Tube is a testament to the company’s dedication to providing high-quality, durable solutions for heavy-duty applications ³.

Compatibility with Cummins Engines

The Cummins part 4966939, a Breather Tube, is designed to fit seamlessly within specific Cummins engine models. This part is integral to the engine’s ventilation system, ensuring that the crankcase is properly ventilated to prevent the buildup of harmful gases and maintain optimal engine performance.

QSK19 Series Engines

The QSK19 series engines, including the QSK19 CM2350 K144G and QSK19 CM850 MCRS, are equipped with the Breather Tube part 4966939. This part is crucial in these engines as it helps manage the pressure within the crankcase, preventing oil contamination and ensuring the longevity of the engine components.

• QSK19 CM2350 K144G: This engine model benefits from the Breather Tube part 4966939 by maintaining a balanced pressure environment within the crankcase. This balance is essential for preventing oil leaks and ensuring the engine operates efficiently under various conditions.

• QSK19 CM850 MCRS: Similarly, the QSK19 CM850 MCRS engine relies on the Breather Tube part 4966939 to manage crankcase pressure. This part ensures that the engine’s ventilation system functions correctly, contributing to the overall reliability and performance of the engine.

By integrating the Breather Tube part 4966939 into these engines, Cummins ensures that the QSK19 series maintains its reputation for durability and efficiency. This part is a critical component in the engine’s design, providing essential ventilation and pressure management ³.

Role of Part 4966939 Breather Tube in Engine Systems

The part 4966939 Breather Tube is an essential component in the arrangement of various engine systems, particularly in managing the crankcase breather system. This tube facilitates the release of gases that accumulate within the crankcase, ensuring that the engine operates efficiently and maintains optimal performance.

In the crankcase breather system, the Breather Tube plays a significant role by providing a pathway for these gases to escape. As the engine runs, it produces blow-by gases—a mixture of air, fuel, and combustion byproducts—that enter the crankcase. If these gases are not properly vented, they can lead to increased pressure within the crankcase, potentially causing oil leaks, reduced engine efficiency, and even damage to engine components.

The Breather Tube is designed to work in conjunction with other components such as the breather valve and the PCV (Positive Crankcase Ventilation) system. When integrated into the engine’s crankcase ventilation system, the Breather Tube allows these gases to be directed back into the intake manifold, where they can be re-burned in the combustion chamber. This not only helps in reducing emissions but also ensures that the engine operates within its designed parameters.

Additionally, the Breather Tube contributes to maintaining the cleanliness of the crankcase. By allowing gases to escape, it prevents the buildup of contaminants that could otherwise mix with the engine oil, degrading its quality and effectiveness. This, in turn, supports the longevity and reliability of the engine.

In summary, the part 4966939 Breather Tube is a vital element in the efficient functioning of the crankcase breather and ventilation systems, playing a key role in pressure management, emission control, and overall engine health ⁴.

Conclusion

The Cummins 4966939 Breather Tube is a critical component in the maintenance and efficiency of heavy-duty truck engines. By ensuring proper ventilation of the crankcase, it contributes to the prevention of oil contamination, reduction of engine wear, and enhancement of overall engine performance. Regular maintenance and proper installation are key to maximizing the benefits of this part, ensuring the longevity and reliability of the engine system.