3940631
Water Outlet Connection
Cummins®

Introduction

The Water Outlet Connection 3940631 is a component manufactured by Cummins, a well-established name in the commercial truck industry. This part is integral to the operation of commercial trucks, specifically within the engine cooling system. Cummins, known for its commitment to quality and innovation, produces this component to ensure reliable and efficient engine performance ¹.

Basic Concepts of Water Outlet Connections

A water outlet connection is a part of the engine cooling system that facilitates the flow of coolant from the engine to the radiator. Its function is to maintain optimal engine temperature by allowing coolant to circulate through the engine block, absorbing heat, and then transferring it to the radiator where it is cooled before re-entering the engine. This continuous cycle is vital for preventing engine overheating and ensuring consistent performance ².

Purpose of the 3940631 Water Outlet Connection

The 3940631 Water Outlet Connection plays a specific role in the cooling system of a truck. Positioned to connect the engine to the radiator, it allows for the efficient transfer of coolant. Its design ensures a secure fit and reliable seal, which is crucial for maintaining the integrity of the cooling system. By interacting seamlessly with other components, it contributes to the overall efficiency and reliability of the engine ³.

Key Features

The 3940631 Water Outlet Connection is characterized by several key features that enhance its performance and durability. It is constructed from high-quality materials that resist corrosion and wear, ensuring longevity. The design includes precise fittings and seals that prevent leaks, maintaining the efficiency of the cooling system. Additionally, it is engineered to withstand the high pressures and temperatures within the engine compartment, ensuring reliable operation under various conditions ⁴.

Benefits

The use of the 3940631 Water Outlet Connection offers several benefits. It contributes to improved engine efficiency by ensuring consistent coolant flow, which helps maintain optimal engine temperature. This, in turn, enhances the longevity and reliability of the engine. Furthermore, by reducing the risk of overheating and associated damage, it can lead to lower maintenance costs and improved overall truck performance.

Installation Process

Installing the 3940631 Water Outlet Connection involves several steps to ensure a secure and effective setup. Preparatory steps include cleaning the installation area and inspecting the connection for any damage. The required tools may include wrenches and sealant to ensure a tight seal. Following the manufacturer’s guidelines, the connection should be aligned with the engine and radiator fittings, tightened to the specified torque, and checked for leaks before final assembly.

Troubleshooting Common Issues

Common issues with the 3940631 Water Outlet Connection may include leaks or corrosion. To troubleshoot these problems, begin by inspecting the connection for signs of wear or damage. If a leak is detected, ensure that the connection is properly tightened and that the seals are intact. Corrosion can be addressed by cleaning the affected areas and applying a corrosion-resistant coating. Regular inspections can help identify and resolve these issues promptly.

Maintenance Tips

To ensure the longevity and optimal performance of the 3940631 Water Outlet Connection, regular maintenance is recommended. This includes periodic inspections for signs of wear, corrosion, or leaks. Cleaning the connection and surrounding areas can prevent buildup that may affect performance. Additionally, following the manufacturer’s guidelines for coolant changes and system flushes can help maintain the efficiency of the cooling system.

Cummins Overview

Cummins Inc. is a leader in the commercial truck industry, with a history of innovation and quality in manufacturing automotive components. The company offers a wide range of products designed to enhance the performance and reliability of commercial vehicles. Cummins’ commitment to excellence is evident in its rigorous testing and quality control processes, ensuring that each component, including the 3940631 Water Outlet Connection, meets the highest standards of durability and performance.

Water Outlet Connection (Part 3940631) Compatibility with Cummins Engines

The Water Outlet Connection part 3940631 is a crucial component in the cooling system of various Cummins engines. This part is designed to ensure efficient water flow and temperature regulation, which is vital for maintaining engine performance and longevity. Below is a detailed description of its compatibility with different Cummins engines.

ISC Series Engines

• ISC CM554
• ISC CM850
• ISC8.3 CM2250
• ISL CM2150
• ISL CM554
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250

The Water Outlet Connection part 3940631 is compatible with all ISC and ISL series engines listed above. These engines are known for their robust design and are widely used in various applications, including heavy-duty trucks and industrial machinery. The part ensures that the cooling system operates efficiently, preventing overheating and maintaining optimal engine temperature.

QSC and QSL Series Engines

• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)
• QSC9 CM2250 / QSL9 CM2250
• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM2350 L102
• QSL9 CM554
• QSL9 CM850 (CM2850)

The part 3940631 is also compatible with the QSC and QSL series engines. These engines are engineered for high performance and reliability, often used in demanding applications such as construction equipment and agricultural machinery. The Water Outlet Connection part ensures that the cooling system functions correctly, providing the necessary thermal management for these engines.

L8.9 Series Engines

• L8.9
• L8.9 CM2670 L134C
• L8.9 L121

The L8.9 series engines benefit from the Water Outlet Connection part 3940631, which is designed to fit seamlessly into the cooling system of these engines. These engines are typically used in medium-duty applications, and the part helps maintain the engine’s efficiency and durability by ensuring proper water flow and temperature control.

By ensuring compatibility with these diverse engine models, the Water Outlet Connection part 3940631 plays a vital role in the overall performance and reliability of Cummins engines across various applications.

Understanding the Role of Part 3940631 Water Outlet Connection in Engine Systems

In the intricate network of an engine system, the water outlet connection, specifically part 3940631, serves as a vital link facilitating the circulation of coolant. This component is strategically positioned to connect the water outlet to other critical parts of the cooling system, ensuring efficient heat management within the engine.

Integration with the Cooling System

The water outlet connection interfaces directly with the water pump, allowing coolant to be drawn from the radiator and circulated through the engine block. As the coolant moves through the engine, it absorbs heat generated by combustion, which is then transferred back to the radiator for dissipation. This continuous cycle is essential for maintaining optimal engine temperature and preventing overheating.

Interaction with the Thermostat Housing

Part 3940631 is also integral to the thermostat housing assembly. The thermostat, housed within this assembly, regulates the flow of coolant based on engine temperature. When the engine is cold, the thermostat restricts coolant flow to warm the engine quickly. As the engine reaches operating temperature, the thermostat opens, allowing coolant to flow through the radiator for cooling. The water outlet connection ensures a secure and leak-free transition between the thermostat housing and the upper radiator hose.

Connection to the Upper Radiator Hose

The upper radiator hose is another component that relies on the water outlet connection. This hose carries hot coolant from the engine to the radiator, where it releases heat and cools down before returning to the engine. The water outlet connection provides a robust and reliable link between the engine and the radiator, ensuring that the coolant pathway remains intact and functional.

Role in Maintaining System Pressure

In addition to facilitating coolant flow, the water outlet connection plays a part in maintaining system pressure. A properly sealed connection prevents coolant leaks and helps sustain the pressure required for efficient coolant circulation. This pressure is vital for the proper functioning of the cooling system, as it ensures that coolant reaches all parts of the engine, including the cylinder head and block.

Contribution to Engine Longevity

By ensuring consistent and efficient coolant flow, the water outlet connection contributes to the overall longevity of the engine. Proper cooling prevents excessive heat buildup, which can lead to engine wear, reduced performance, and potential failure. The reliable performance of part 3940631 is therefore essential for the sustained health and efficiency of the engine system.

Conclusion

The Water Outlet Connection 3940631 by Cummins is a critical component in the engine cooling system of commercial trucks. Its role in facilitating efficient coolant flow, maintaining system pressure, and ensuring engine longevity cannot be overstated. With its high-quality construction, precise design, and compatibility with various Cummins engines, this part is essential for the reliable and efficient operation of commercial vehicles.