4086795
BREATHER,CRANKCASE
Cummins®

The Cummins 4086795 Crankcase Breather is a component designed to manage the pressure within the crankcase of heavy-duty truck engines. Its role is significant in maintaining the overall health and performance of the engine. By allowing the release of gases and vapors that accumulate during engine operation, it helps to prevent the buildup of pressure that could lead to oil leaks and other engine issues ¹.

Basic Concepts of Crankcase Breather

A crankcase breather is a device that facilitates the release of gases and vapors from the crankcase of an engine. As the engine operates, it produces gases and vapors that need to be expelled to maintain optimal pressure levels within the crankcase. The breather allows these byproducts to escape while preventing external contaminants from entering the engine, thus preserving the integrity of the engine’s internal components ².

Purpose of the Cummins 4086795 Crankcase Breather

This Cummins part plays a role in the operation of a truck by managing the pressure within the crankcase. This management is vital for maintaining engine health and performance. By expelling gases and vapors, it helps to prevent oil contamination and reduces the risk of oil leaks, which can lead to engine damage. Additionally, it contributes to the overall efficiency of the engine by ensuring that the crankcase operates within the desired pressure range ³.

Key Features

The Cummins 4086795 Crankcase Breather is constructed with high-quality materials to ensure durability and reliable performance. Its design includes features that enhance its functionality, such as a robust housing that protects the internal components from damage and a filtration system that prevents contaminants from entering the engine. The breather is engineered to withstand the demanding conditions of heavy-duty truck operation, ensuring long-lasting performance ⁴.

Benefits

The Cummins 4086795 Crankcase Breather offers several advantages, including improved engine efficiency through effective pressure management. It also contributes to reduced wear and tear on engine components by preventing oil contamination and maintaining optimal crankcase pressure. Additionally, the breather enhances the longevity of engine components by ensuring a clean and stable operating environment within the crankcase.

Installation and Compatibility

Proper installation of the Cummins 4086795 Crankcase Breather is important for ensuring its effective operation. It is designed to be compatible with specific truck models, and installation guidelines should be followed to ensure it functions as intended. Considerations for different truck models may include specific mounting locations and connection points to ensure a secure and efficient installation.

Maintenance and Troubleshooting

Routine maintenance of the Cummins 4086795 Crankcase Breather is important for its continued effective operation. This includes regular inspection intervals to check for signs of wear or damage, cleaning procedures to remove any accumulated debris, and addressing common issues such as blockages or leaks. Troubleshooting tips may include checking for proper installation, ensuring the filtration system is clean, and verifying that the breather is securely mounted.

Performance Impact

The Cummins 4086795 Crankcase Breather contributes to overall engine performance by maintaining optimal crankcase pressure, which can lead to improved fuel efficiency and reduced emissions. By ensuring a clean and stable operating environment within the crankcase, it helps to enhance the engine’s reliability and longevity, making it a valuable component in the operation of heavy-duty trucks.

Regulatory Compliance

The Cummins 4086795 Crankcase Breather complies with industry standards and regulations, ensuring safe and efficient operation in commercial trucking applications. Its design and construction meet the requirements for durability, performance, and environmental responsibility, making it a reliable choice for heavy-duty truck engines.

Cummins Overview

Cummins Inc. is a well-established company in the automotive industry, known for its commitment to innovation and quality in manufacturing automotive components. With a history of producing reliable and high-performance engine parts, Cummins has built a reputation for excellence and continues to be a leader in the development of advanced engine technologies.

Cummins Crankcase Breather Part 4086795 Compatibility

The Cummins Crankcase Breather part number 4086795 is designed to fit seamlessly within the engine systems of various Cummins engines, ensuring optimal performance and reliability. This part is integral to the engine’s ventilation system, managing the release of gases that accumulate within the crankcase.

QSK45 Engine Family

The QSK45 engine series, which includes models such as the QSK45 CM500, is engineered for heavy-duty applications, providing robust power and efficiency. The Crankcase Breather part 4086795 is specifically tailored to integrate with the QSK45 engines, facilitating the controlled release of crankcase gases and preventing pressure build-up that could compromise engine integrity.

CM500 Engine Series

The CM500 engine series, part of the Cummins lineup, is known for its versatility and adaptability across various industries. The Crankcase Breather part 4086795 is engineered to fit these engines, ensuring that the ventilation system operates efficiently. This part’s design allows for the effective management of crankcase gases, contributing to the engine’s overall performance and longevity.

By ensuring a proper fit and function, the Cummins Crankcase Breather part 4086795 plays a role in maintaining the health and efficiency of the QSK45 and CM500 engine series.

Role of Part 4086795 Crankcase Breather in Engine Systems

The part 4086795 Crankcase Breather is a component in maintaining the health and efficiency of engine systems. It is designed to manage the pressure within the crankcase by allowing the release of gases and vapors that accumulate during engine operation.

When an engine runs, it produces blow-by gases—a mixture of air, fuel, and combustion byproducts—that escape past the piston rings into the crankcase. If these gases are not effectively vented, they can lead to increased pressure, which may cause oil leaks, reduced lubrication efficiency, and potential damage to seals and gaskets.

The Crankcase Breather, part 4086795, works in conjunction with the Positive Crankcase Ventilation (PCV) system to ensure that these gases are safely routed back into the intake manifold. This process not only helps in maintaining optimal crankcase pressure but also contributes to reducing emissions by recirculating these gases back into the combustion process.

In more advanced engine systems, the Crankcase Breather may also interact with other components such as the oil separator. The oil separator captures any liquid hydrocarbons from the crankcase vapors before they enter the intake system, ensuring that only clean gases are recirculated. This enhances engine performance and prolongs the life of the intake system components.

Additionally, the breather plays a role in the overall ventilation strategy of the engine bay. By allowing controlled airflow, it assists in cooling critical components and preventing the buildup of harmful contaminants. This is particularly important in high-performance engines where thermal management is a key consideration.

In summary, the integration of part 4086795 Crankcase Breather within engine systems is vital for pressure regulation, emission control, and maintaining the integrity of various engine components. Its effective functioning ensures a balanced and efficient operation of the engine, contributing to both performance and longevity.

Conclusion

The Cummins 4086795 Crankcase Breather is a critical component in the maintenance and performance of heavy-duty truck engines. By managing crankcase pressure, preventing oil contamination, and ensuring efficient ventilation, this part contributes to the overall health, efficiency, and longevity of the engine. Proper installation, maintenance, and understanding of its role within the engine system are essential for maximizing its benefits.