4945147
BREATHER,CRANKCASE
Cummins®

Introduction

The Cummins 4945147 Crankcase Breather is a component designed for use in commercial trucks. Its purpose is to facilitate the proper ventilation of the engine’s crankcase, which is vital for maintaining engine health and performance. By allowing the release of pressure and contaminants from the crankcase, this breather contributes to the overall efficiency and longevity of the engine ¹.

Basic Concepts of Crankcase Breathers

A crankcase breather is a device that allows air to enter and exit the crankcase of an engine. Its function is to maintain a balanced pressure within the crankcase, which is necessary for the proper operation of the engine. Proper ventilation prevents the buildup of pressure and contaminants, such as moisture and sludge, which can adversely affect engine performance and component lifespan ².

Purpose and Function

The Cummins 4945147 Crankcase Breather is designed to manage the pressure within the crankcase and to release contaminants that accumulate during engine operation. By doing so, it helps to maintain a clean and stable environment within the crankcase, which is conducive to efficient engine operation. This breather plays a role in ensuring that the engine operates within optimal parameters by facilitating the removal of unwanted substances and maintaining appropriate pressure levels ³.

Key Features

The Cummins 4945147 Crankcase Breather incorporates several design elements and materials that enhance its performance. It is constructed from durable materials to withstand the harsh conditions within the engine compartment. The design includes features that maximize airflow and filtration efficiency, ensuring that contaminants are effectively removed from the crankcase. Additionally, it is engineered to be compatible with specific Cummins engine models, ensuring a precise fit and function.

Benefits

Utilizing the Cummins 4945147 Crankcase Breather can lead to several advantages. These include improved engine performance due to better crankcase ventilation, extended lifespan of engine components by reducing the accumulation of contaminants, and enhanced reliability of the engine system. Proper ventilation contributes to the overall health of the engine, leading to more consistent and efficient operation.

Installation and Compatibility

For the Cummins 4945147 Crankcase Breather to function correctly, it should be installed according to the manufacturer’s guidelines. This includes ensuring that it is securely fitted and that all connections are properly sealed. Compatibility with various Cummins engine models is a key consideration, and it is important to verify that the breather is suitable for the specific engine application.

Maintenance and Troubleshooting

Regular maintenance of the Cummins 4945147 Crankcase Breather is important to ensure its continued effective operation. This includes periodic inspection for signs of wear or damage and cleaning or replacing the breather as necessary. Common issues that may arise include reduced airflow or contamination, which can often be addressed through routine maintenance practices.

Environmental and Safety Considerations

Proper crankcase ventilation plays a role in reducing emissions by ensuring that the engine operates efficiently and that contaminants are effectively managed. The Cummins 4945147 Crankcase Breather contributes to this by facilitating the removal of unwanted substances from the crankcase. Safety precautions should be observed during installation and maintenance to protect against injury and ensure the safe operation of the engine.

Cummins 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 serves customers in approximately 190 countries and territories through a network of more than 600 company-owned and independent distributor facilities and more than 7,200 dealer locations. The company’s product range includes diesel and natural gas engines, as well as related technologies that enhance engine performance and efficiency.

Cummins BREATHER,CRANKCASE Part 4945147 Compatibility

The Cummins BREATHER,CRANKCASE part number 4945147 is designed to fit a range of Cummins engines, ensuring proper ventilation and pressure management within the crankcase. This part is crucial for maintaining engine health by allowing the escape of gases that can build up during normal operation.

Compatible Engines

• ISC CM2150
• ISC8.3 CM2250
• ISL9 CM2250
• QSC9 CM2250/QSL9 CM2250
• QSL9 CM2250

These engines, while differing in specifications and applications, share a common requirement for effective crankcase ventilation. The BREATHER,CRANKCASE part 4945147 is engineered to meet this need across the listed engine models, ensuring compatibility and reliability.

Engine Grouping

The engines can be grouped based on their series and model numbers:

• ISC Series:

  • ISC CM2150
  • ISC8.3 CM2250

• ISL Series:

  • ISL9 CM2250

• QSC/QSL Series:

  • QSC9 CM2250/QSL9 CM2250
  • QSL9 CM2250

Each series represents a distinct line of Cummins engines, with the BREATHER,CRANKCASE part 4945147 being a versatile component that fits seamlessly into these various engine configurations.

Role of Part 4945147 BREATHER,CRANKCASE in Engine Systems

The part 4945147 BREATHER,CRANKCASE is an essential component in maintaining the health and efficiency of engine systems. It is specifically designed to manage the pressure within the crankcase, which is vital for the proper functioning of several interconnected components.

Interaction with Crankcase Breather

The crankcase breather system is responsible for venting gases that accumulate within the crankcase. As the engine operates, blow-by gases—a mixture of air, fuel, and combustion byproducts—pass through the piston rings and enter the crankcase. The 4945147 BREATHER,CRANKCASE facilitates the release of these gases, preventing a buildup of pressure that could lead to oil leaks, reduced engine performance, and potential damage to seals and gaskets. By ensuring a consistent pressure environment, this component helps maintain the integrity of the crankcase and supports optimal engine operation.

Integration with Valve Cover

The valve cover, which houses the valve train components, also plays a role in the breather system. The 4945147 BREATHER,CRANKCASE often connects to the valve cover to create a sealed pathway for the expelled gases. This connection ensures that the gases are directed away from the engine compartment, typically routing them back into the intake system where they can be re-burned. This not only helps in pressure management but also contributes to emissions control by ensuring that unburned hydrocarbons are recaptured and combusted, rather than being released into the atmosphere.

Conclusion

In summary, the 4945147 BREATHER,CRANKCASE works in concert with the crankcase breather and valve cover to maintain a balanced pressure environment within the engine, enhance performance, and ensure efficient operation of the engine system. Proper installation, maintenance, and understanding of its role are crucial for maximizing the benefits of this Cummins part.