3973091
Air Cleaner
Cummins®

Introduction

The Cummins 3973091 Air Cleaner is a component designed for use in commercial trucks. It serves to filter the air entering the engine, ensuring that only clean air reaches the combustion chambers. This part is significant in maintaining the efficiency and longevity of the truck’s engine by preventing contaminants from entering the system ¹.

Basic Concepts of Air Cleaners

An air cleaner, or air filter, is a device that removes impurities from the air entering an engine. It functions by drawing air through a filtering medium that traps particles such as dust, dirt, and other debris. The importance of an air cleaner in the engine system of a truck lies in its ability to protect the engine from wear and damage caused by these contaminants, thereby contributing to the overall performance and durability of the engine ².

Purpose of the Cummins 3973091 Air Cleaner

The Cummins 3973091 Air Cleaner plays a role in the operation of a truck by ensuring that the engine receives clean air. This contributes to engine performance by allowing for optimal combustion, which can lead to better fuel efficiency and reduced emissions. Additionally, by keeping contaminants out of the engine, this air cleaner helps in prolonging the engine’s lifespan ³.

Key Features

The Cummins 3973091 Air Cleaner is characterized by its robust design and the quality materials used in its construction. It features a high-efficiency filtering medium that provides excellent dust-holding capacity. The design of this air cleaner also includes features that facilitate easy maintenance and replacement of the filter element.

Benefits of Using the Cummins 3973091 Air Cleaner

Utilizing the Cummins 3973091 Air Cleaner offers several advantages. It contributes to improved engine efficiency by ensuring that the air entering the engine is free from contaminants. This can lead to reduced maintenance costs over time, as a cleaner engine operates more reliably and requires less frequent servicing. Additionally, the enhanced durability of the engine, due to the protection provided by the air cleaner, can result in longer service intervals and extended engine life.

Installation Process

Installing the Cummins 3973091 Air Cleaner involves several steps to ensure proper fitment and function. The process includes removing the old air cleaner, if present, and inspecting the mounting area for any debris or damage. The new air cleaner is then positioned and secured according to the manufacturer’s instructions, which may involve the use of specific tools or additional components to ensure a proper seal and alignment.

Regular Maintenance Practices

To ensure the optimal performance of the Cummins 3973091 Air Cleaner, routine maintenance practices are recommended. This includes regular inspection of the air cleaner for signs of damage or excessive dirt accumulation. The filter element should be replaced according to the manufacturer’s schedule or as conditions dictate, to maintain efficient air filtration. Additionally, the air cleaner housing should be cleaned periodically to remove any external debris that could affect airflow.

Troubleshooting Common Issues

Common issues with the Cummins 3973091 Air Cleaner may include reduced airflow due to a clogged filter or leaks in the air cleaner housing. To address these problems, the filter element should be inspected and replaced if necessary. Any leaks in the housing should be sealed to ensure that the engine receives a consistent supply of clean air. Regular maintenance and inspections can help prevent many of these issues.

Performance Enhancements

While the Cummins 3973091 Air Cleaner is designed to provide reliable performance, there are potential upgrades or modifications that can be made to further improve truck performance. These may include the use of high-flow air filters for increased airflow or the addition of aftermarket air cleaner systems that offer enhanced filtration capabilities. Such modifications should be considered based on the specific operating conditions and performance requirements of the truck.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for quality and innovation in the commercial truck industry. The company offers a wide range of products designed to meet the diverse needs of its customers, from heavy-duty trucks to off-highway equipment.

Air Cleaner Part 3973091 Compatibility with Cummins Engines

The Cummins Air Cleaner part 3973091 is designed to fit seamlessly with a variety of Cummins engines, ensuring optimal performance and efficiency. This part is engineered to provide a reliable air filtration system, which is crucial for maintaining the engine’s health and longevity.

QSB5.9 CM850

The QSB5.9 CM850 engine is one of the models that benefit from the installation of the part 3973091. This engine is known for its robust performance and reliability, making it a popular choice in various applications. The air cleaner part is specifically designed to fit this engine model, ensuring that it can effectively filter out contaminants and provide a clean air supply to the engine.

Other Cummins Engines

While the QSB5.9 CM850 is highlighted, it is important to note that the part 3973091 is compatible with a range of Cummins engines. This compatibility is due to the standardized design and engineering principles that Cummins employs across its engine lineup. By using the part 3973091, users can ensure that their Cummins engines receive the necessary air filtration, regardless of the specific model.

Role of Part 3973091 Air Cleaner in Engine Systems

The air cleaner, specifically part 3973091, is a component in maintaining the efficiency and performance of engine systems. Its primary function is to filter the air entering the engine, ensuring that only clean air reaches the combustion chamber. This filtration process is vital for several reasons:

1. Protection of Engine Components: By removing dust, dirt, and other particulates from the intake air, the air cleaner helps protect sensitive engine components such as the pistons, cylinders, and valves from abrasive wear. This extends the lifespan of these parts and ensures smoother operation ¹.

2. Optimized Combustion: Clean air is essential for optimal combustion. The air cleaner ensures that the air-fuel mixture is as precise as possible, which enhances combustion efficiency. This leads to better fuel economy and reduced emissions ².

3. Maintenance of Airflow: The air cleaner housing is designed to maintain a consistent airflow into the engine. Proper airflow is necessary for the engine to operate at peak performance. Any restriction in airflow can lead to decreased power output and inefficient engine operation ³.

4. Support for Turbochargers and Superchargers: In engines equipped with turbochargers or superchargers, the air cleaner plays an even more significant role. These systems compress the incoming air, and any contaminants can cause rapid wear on the compressor wheels and other components. The air cleaner ensures that the compressed air remains clean, thereby protecting these high-stress parts.

5. Integration with Sensor Systems: Modern engines are equipped with various sensors that monitor air intake. The air cleaner ensures that the sensors receive accurate readings by providing a consistent and clean air supply. This data is crucial for the engine control unit (ECU) to make real-time adjustments for optimal performance.

Conclusion

In summary, the Cummins 3973091 Air Cleaner is integral to the functioning of engine systems. It not only protects internal components but also ensures that the engine operates efficiently and effectively. Regular maintenance and proper installation are key to maximizing the benefits of this part.