3943990
Water Inlet Connection
Cummins®

The Water Inlet Connection 3943990 by Cummins is a component designed to facilitate the efficient operation of commercial truck cooling systems. This part ensures the proper flow of coolant into the engine, which is vital for maintaining optimal engine temperature and performance. Understanding its purpose and significance can help in maintaining the overall efficiency and longevity of the truck’s engine.

Basic Concepts of Water Inlet Connection

Water inlet connections in truck cooling systems serve the fundamental purpose of directing coolant from the radiator into the engine. This process helps in dissipating heat generated by the engine, thereby preventing overheating. The operation of these connections involves a series of passages and fittings that ensure a consistent and regulated flow of coolant. Proper function of these connections is essential for the effective management of engine temperature ¹.

Purpose of the 3943990 Water Inlet Connection

The 3943990 Water Inlet Connection plays a role in the truck’s cooling system by providing a secure and efficient pathway for coolant to enter the engine. It is designed to handle the pressures and temperatures associated with engine operation, ensuring that coolant is delivered consistently and without leaks. This component helps in maintaining the engine’s thermal balance, which is necessary for reliable performance and durability ².

Key Features

The 3943990 Water Inlet Connection is constructed from durable materials that can withstand the rigors of commercial truck operation. Its design includes precise fittings and passages that ensure a smooth and uninterrupted flow of coolant. Additionally, this component may feature unique attributes such as enhanced sealing mechanisms to prevent leaks and corrosion-resistant coatings to extend its service life.

Benefits

The advantages provided by the 3943990 Water Inlet Connection include improved coolant flow, which enhances the efficiency of the cooling system. Its durable construction ensures long-term reliability, reducing the need for frequent replacements. Furthermore, the efficient design of this component contributes to the overall performance and longevity of the engine by ensuring consistent coolant delivery ³.

Installation Process

Installing the 3943990 Water Inlet Connection requires careful attention to detail to ensure proper function. The process involves removing the old connection, cleaning the mating surfaces, and attaching the new component using the appropriate tools. It is important to follow manufacturer guidelines to ensure a secure and leak-free installation. Proper torque specifications should be adhered to during the installation to prevent over-tightening or under-tightening, which could lead to leaks or damage.

Common Issues and Troubleshooting

Common problems associated with water inlet connections include leaks, corrosion, and blockages. Troubleshooting these issues involves inspecting the connection for signs of wear or damage, cleaning any debris from the passages, and ensuring that all fittings are secure. If leaks are detected, the connection may need to be replaced to prevent coolant loss and potential engine damage.

Maintenance Tips

Regular maintenance practices can help ensure the longevity and optimal performance of the 3943990 Water Inlet Connection. This includes periodic inspection for signs of wear or corrosion, ensuring that all connections are tight, and replacing the component if any damage is detected. Additionally, using the recommended type of coolant can help prevent corrosion and extend the life of the connection.

Compatibility and Applications

The 3943990 Water Inlet Connection is designed for use in specific types of trucks and engines. It is important to verify compatibility with the make and model of the truck to ensure proper fit and function. This component is engineered to meet the demands of commercial truck applications, providing reliable performance in various operating conditions.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including engines, filtration, and emissions solutions. With a history of innovation and quality, Cummins has established a strong reputation in the commercial truck industry. The company’s product range includes components and systems that are designed to deliver reliable performance and efficiency, contributing to the success of commercial truck operations worldwide.

Water Inlet Connection Part 3943990 Compatibility with Cummins Engines

The Water Inlet Connection part 3943990, manufactured by Cummins, is a critical component in the cooling system of various Cummins engines. This part is designed to facilitate the flow of coolant into the engine, ensuring optimal thermal management and performance. Below is a detailed overview of the engines with which this part is compatible:

Cummins 4B3.9 and QSB3.9 30 CM550

The Water Inlet Connection part 3943990 is compatible with the Cummins 4B3.9 and QSB3.9 30 CM550 engines. These engines are known for their robust performance and reliability, often used in agricultural and construction equipment. The part ensures efficient coolant flow, maintaining the engine’s operating temperature within the desired range.

Cummins 6B5.9 and QSB5.9 30 CM550, QSB5.9 44 CM550

This part also fits the Cummins 6B5.9 and QSB5.9 30 CM550, QSB5.9 44 CM550 engines. These engines are typically used in heavy-duty applications, including trucks and industrial machinery. The Water Inlet Connection part 3943990 is essential for these engines, ensuring that the coolant is properly directed into the system, enhancing the engine’s longevity and efficiency.

Cummins B4.5 and QSB4.5 CM2250 EC, QSB4.5 CM850(CM2850)

The Water Inlet Connection part 3943990 is compatible with the Cummins B4.5 and QSB4.5 CM2250 EC, QSB4.5 CM850(CM2850) engines. These engines are often found in medium-duty vehicles and equipment. The part’s design ensures that the coolant is effectively managed, contributing to the engine’s overall performance and durability.

Cummins B6.7 CM2670 B164C, QSB6.7 CM2250, QSB6.7 CM850(CM2850)

The part is also suitable for the Cummins B6.7 CM2670 B164C, QSB6.7 CM2250, and QSB6.7 CM850(CM2850) engines. These engines are used in a variety of applications, from heavy-duty trucks to industrial machinery. The Water Inlet Connection part 3943990 plays a crucial role in maintaining the coolant flow, ensuring the engine operates efficiently and reliably.

Cummins ISB CM550, ISB CM850, ISBE CM800, ISBE4 CM850

The Water Inlet Connection part 3943990 fits the Cummins ISB CM550, ISB CM850, ISBE CM800, and ISBE4 CM850 engines. These engines are commonly used in on-highway and vocational applications. The part ensures that the coolant is properly managed, contributing to the engine’s performance and longevity.

Cummins QSB7 CM2880 B117

Lastly, the Water Inlet Connection part 3943990 is compatible with the Cummins QSB7 CM2880 B117 engine. This engine is often used in heavy-duty applications, including construction and agricultural equipment. The part ensures efficient coolant flow, maintaining the engine’s optimal operating temperature and enhancing its performance and durability.

Role of Part 3943990 Water Inlet Connection in Engine Systems

The part 3943990 Water Inlet Connection is integral to the efficient operation of various engine systems. It serves as a conduit for the introduction of water into the engine’s cooling system, ensuring that the engine maintains optimal operating temperatures.

In the context of the cooling system, the water inlet connection interfaces with the water pump, allowing coolant to be circulated through the engine block and cylinder head. This circulation is vital for dissipating heat generated during combustion. The connection also facilitates the flow of coolant to and from the radiator, where heat is expelled into the atmosphere.

Furthermore, the water inlet connection plays a role in the thermostat housing assembly. It allows for the regulated flow of coolant based on engine temperature, ensuring that the engine reaches its operating temperature quickly and maintains it under varying conditions.

In diesel engines, the water inlet connection is also associated with the exhaust gas recirculation (EGR) cooler. Coolant flows through the EGR cooler to reduce the temperature of recirculated exhaust gases, which helps in lowering nitrogen oxide emissions.

Additionally, in engines equipped with an intercooler, the water inlet connection may be part of the system that cools the compressed air from the turbocharger before it enters the combustion chamber, enhancing engine efficiency and power output.

Overall, the water inlet connection is a key component that ensures the proper function of the engine’s cooling system, contributing to the engine’s longevity and performance.

Conclusion

The 3943990 Water Inlet Connection by Cummins is a vital component in the cooling systems of commercial trucks. Its role in ensuring efficient coolant flow and maintaining optimal engine temperature is crucial for the performance and longevity of the engine. Proper installation, regular maintenance, and understanding its compatibility with specific engines are essential for maximizing the benefits of this component.