2830405
BREATHER,CRANKCASE
Cummins®

The BREATHER, CRANKCASE part 2830405, manufactured by Cummins, is a critical component for the operation of commercial trucks. It is designed to manage the pressure within the crankcase, ensuring the engine operates efficiently and remains in optimal condition. This part is essential for maintaining the health and performance of the engine by allowing for the release of gases and vapors that accumulate during engine operation.

Basic Concepts of Crankcase Breathers

A crankcase breather is a device that allows gases and vapors to escape from the crankcase of an engine. Its function is to prevent the buildup of pressure within the crankcase, which can lead to oil leaks, reduced engine efficiency, and potential damage to engine components. The breather operates by providing a controlled path for these gases to exit the crankcase, thereby maintaining a stable internal pressure and protecting the engine’s integrity ¹.

Purpose and Role in Truck Operation

The BREATHER, CRANKCASE part 2830405 plays a significant role in the operation of a truck by managing the pressure within the crankcase. This management is essential for maintaining optimal engine performance, as it prevents the accumulation of gases and vapors that can interfere with the engine’s operation. By ensuring a stable internal pressure, the breather contributes to the engine’s efficiency and longevity, allowing for smoother and more reliable truck operation ².

Key Features

The Cummins BREATHER, CRANKCASE part 2830405 is characterized by several key features that enhance its functionality. These include a robust design that ensures durability under the demanding conditions of commercial truck operation, the use of high-quality materials to resist wear and corrosion, and unique design elements that optimize the flow of gases and vapors from the crankcase. These features collectively contribute to the breather’s effectiveness in maintaining engine health ³.

Benefits

The use of the BREATHER, CRANKCASE part 2830405 offers several benefits, including improved engine efficiency through effective pressure management, reduced wear and tear on engine components by preventing the buildup of harmful gases, and enhanced longevity of the engine due to the stable operating conditions it helps maintain. These benefits contribute to the overall reliability and performance of the truck ⁴.

Troubleshooting and Maintenance

Common issues with the BREATHER, CRANKCASE part 2830405 may include blockages or damage that impede its function. Symptoms to watch for include oil leaks, reduced engine performance, or unusual noises from the engine area. Diagnostic steps involve inspecting the breather for signs of damage or blockage and ensuring it is securely installed. Regular maintenance practices, such as cleaning or replacing the breather as needed, can help ensure continued reliable operation ⁵.

Installation Considerations

When installing the BREATHER, CRANKCASE part 2830405, it is important to follow best practices to ensure proper fit and function. This includes ensuring the breather is correctly aligned with the crankcase and securely fastened. Any specific requirements or recommendations provided by Cummins should be adhered to, such as using the correct torque specifications for fastening components, to ensure the breather operates as intended ⁶.

Compatibility with Cummins Engines

The BREATHER, CRANKCASE part 2830405 is designed to fit a variety of Cummins engines. This part is integral for managing crankcase pressure and ensuring the engine’s longevity by preventing oil contamination and maintaining optimal pressure levels.

B6.7 Series Engines

• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

ISB Series Engines

• ISB CM2150
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

QSB Series Engines

• QSB4.5 CM850 (CM2850)
• QSB6.7 CM2250
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

Role of Part 2830405 BREATHER,CRANKCASE in Engine Systems

In engine systems, the BREATHER, CRANKCASE part 2830405 serves a significant function by managing the pressure within the crankcase. As the engine operates, it generates 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 managed, they can lead to increased pressure, which may cause oil leaks, reduced lubrication efficiency, and potential damage to engine components.

The BREATHER, CRANKCASE is designed to vent these gases in a controlled manner. It allows the crankcase to maintain a stable pressure environment, ensuring that the oil remains in its designated pathways and continues to provide adequate lubrication to moving parts. This component typically connects to the Positive Crankcase Ventilation (PCV) system, which recirculates the vented gases back into the intake manifold. This recirculation not only helps in pressure regulation but also enhances fuel efficiency and reduces emissions by ensuring that these gases are burned again in the combustion process.

Additionally, the BREATHER, CRANKCASE plays a role in preventing the accumulation of moisture and contaminants within the crankcase. By allowing fresh air to enter the crankcase, it helps in displacing any moisture that may condense from the blow-by gases. This is particularly important in preventing the formation of sludge, which can impair the performance of the lubrication system.

Conclusion

In summary, the BREATHER, CRANKCASE part 2830405 is integral to maintaining the health and efficiency of engine systems by regulating crankcase pressure, facilitating the recirculation of blow-by gases, and preventing the buildup of contaminants. Its robust design, high-quality materials, and unique features make it a reliable component for ensuring optimal engine performance and longevity in commercial trucks.