3008836
Expansion Tank
Cummins®

Introduction

The Cummins 3008836 Expansion Tank is a component designed for use in the cooling systems of commercial trucks. Its primary function is to manage the changes in coolant volume that occur due to thermal expansion and contraction, thereby contributing to the overall efficiency and reliability of the truck’s cooling system.

Basic Concepts of Expansion Tanks

An expansion tank is a vital component in any liquid cooling system. It serves as a reservoir that accommodates the increase in coolant volume when the liquid heats up and expands. Conversely, it allows coolant to return when it cools down and contracts. This process is governed by the principles of thermal expansion and contraction, which dictate that liquids change volume with temperature variations ¹. The expansion tank helps maintain system pressure within safe limits, preventing damage to the cooling system components.

Purpose of the 3008836 Expansion Tank

The Cummins 3008836 Expansion Tank plays a role in the operation of a truck’s cooling system by maintaining pressure and accommodating changes in coolant volume. As the engine operates, it generates heat, causing the coolant to expand. The expansion tank provides a space for this expanded coolant, preventing excessive pressure build-up in the system. When the engine cools down, the coolant contracts, and the tank allows it to return to the system, ensuring a consistent coolant level and pressure.

Key Features

The Cummins 3008836 Expansion Tank is constructed with materials that are resistant to corrosion and high temperatures, ensuring durability in heavy-duty applications. It is designed with a specific capacity to handle the volume changes of the coolant effectively. The tank incorporates pressure relief mechanisms to release excess pressure safely, protecting the cooling system from potential damage. Its design considerations include factors such as ease of installation, compatibility with various truck models, and integration with existing cooling system components.

Benefits

The Cummins 3008836 Expansion Tank offers several advantages. It contributes to improved cooling system efficiency by ensuring that the coolant operates within optimal pressure and volume parameters. This helps reduce the risk of overheating, which can lead to engine damage ². Additionally, the tank’s robust construction and design enhance its durability, making it suitable for demanding operating conditions typical of commercial truck use.

Installation Considerations

Proper installation of the Cummins 3008836 Expansion Tank is crucial for its effective operation. It is important to ensure compatibility with the specific truck model to which it is being fitted. The installation process should follow manufacturer guidelines, including correct mounting and secure integration with the existing cooling system components. This ensures that the expansion tank functions as intended, contributing to the overall efficiency and reliability of the truck’s cooling system.

Troubleshooting and Maintenance

Regular maintenance and timely troubleshooting are important for the optimal performance of the Cummins 3008836 Expansion Tank. Common issues may include leaks, pressure irregularities, and coolant contamination. These can often be identified through visual inspections and pressure tests. Recommended maintenance practices include checking for leaks, ensuring the pressure relief mechanisms are functioning correctly, and maintaining the proper coolant level and quality. Addressing these issues promptly can help prevent more significant problems and ensure the longevity of the expansion tank and the cooling system as a whole.

Cummins 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, reliability, and innovation in the commercial truck industry. The company offers a wide range of products and services designed to meet the needs of various industries, including transportation, construction, agriculture, and power generation. Cummins’ commitment to excellence and customer satisfaction has made it a trusted name in the industry.

Cummins Expansion Tank 3008836 Compatibility with K38 and K50 Engines

The Cummins Expansion Tank part number 3008836 is designed to be compatible with a range of Cummins engines, including the K38 and K50 models. This part is integral to the engine’s cooling system, providing a reservoir for coolant expansion and contraction as the engine heats and cools.

K38 Engines

For the K38 engines, the 3008836 expansion tank is engineered to fit seamlessly into the engine’s cooling system architecture. This ensures that the engine maintains optimal coolant levels, preventing overheating and maintaining efficient thermal management. The design of the expansion tank allows for the absorption of excess coolant when the engine is running, which is crucial for maintaining the system’s pressure and preventing coolant loss.

K50 Engines

Similarly, the 3008836 expansion tank is also compatible with the K50 engines. The K50 series, known for its robust performance and reliability, benefits from the precise fit and functionality of the 3008836 expansion tank. This part ensures that the engine’s cooling system operates efficiently, with the tank’s capacity to handle the thermal expansion of coolant under various operating conditions.

Grouping Compatibility

Both the K38 and K50 engines share common design principles in their cooling systems, which allows the 3008836 expansion tank to be a versatile component across these models. Cummins has ensured that the expansion tank is designed to meet the specific needs of these engines, providing a reliable and efficient solution for coolant management. This compatibility is crucial for maintaining the engine’s performance and longevity, as it helps to prevent issues related to coolant overflow, leaks, and system pressure imbalances.

Role of Part 3008836 Expansion Tank in Engine Systems

The Part 3008836 Expansion Tank is an integral component within the engine cooling system, working in concert with the heat exchanger to maintain optimal engine temperature. As coolant circulates through the engine and absorbs heat, it becomes pressurized. The expansion tank provides a reservoir for this pressurized coolant, allowing it to expand without causing damage to the system.

When the engine is operating, the heat exchanger transfers excess heat from the coolant to the surrounding air, cooling the fluid before it re-enters the engine. The expansion tank accommodates the volume changes of the coolant as it heats up and cools down, ensuring consistent pressure within the system. This balance is essential for the efficient operation of the heat exchanger and the overall engine cooling system ³.

Conclusion

In summary, the Cummins 3008836 Expansion Tank plays a significant role in the engine cooling process by managing coolant pressure and volume, directly influencing the performance and longevity of the heat exchanger and the engine cooling system as a whole.