3944720
Water Inlet Connection
Cummins®

Introduction

The Water Inlet Connection 3944720, manufactured by Cummins, is a critical component in the operation of commercial truck engines. This part is essential for maintaining the efficiency of the engine’s cooling system. Understanding its functionality and role is important for ensuring the longevity and performance of truck engines.

Basic Concepts of Water Inlet Connections

A water inlet connection is a component that allows coolant to enter the engine’s cooling system. Its main function is to ensure a consistent flow of coolant to the engine, which is vital for regulating engine temperature. The connection allows coolant to pass into the engine block, where it absorbs heat, and then circulates back to the radiator for cooling ¹.

Purpose of the 3944720 Water Inlet Connection

The 3944720 Water Inlet Connection provides a secure and efficient pathway for coolant to enter the engine. It is designed to withstand the pressures and temperatures within the cooling system, ensuring that the engine remains at an optimal operating temperature. This is important for the engine’s performance and longevity ².

Key Features

The 3944720 Water Inlet Connection is made from durable materials to withstand the high pressures and temperatures of the engine cooling system. Its design includes precise fittings and seals to prevent leaks and ensure a secure connection. It may also feature corrosion-resistant coatings or enhanced sealing mechanisms to improve performance and durability.

Benefits

The advantages of the 3944720 Water Inlet Connection include improved engine performance through efficient cooling, enhanced reliability due to its robust construction, and increased efficiency in the cooling process. These benefits contribute to the overall performance and longevity of the truck’s engine.

Installation Process

Installing the 3944720 Water Inlet Connection requires careful attention to ensure a secure fit. The process involves preparing the engine area, aligning the connection with the engine block, and securing it in place using the appropriate tools. It is important to follow manufacturer guidelines to ensure proper installation and avoid potential issues.

Common Issues and Troubleshooting

Typical problems with the 3944720 Water Inlet Connection may include leaks or improper sealing. Troubleshooting steps involve inspecting the connection for signs of wear or damage, ensuring all seals are intact, and verifying that it is securely fastened. Solutions may range from tightening connections to replacing damaged parts.

Maintenance Tips

Regular maintenance of the 3944720 Water Inlet Connection is vital for its longevity and performance. This includes periodic inspections for signs of wear or damage, ensuring all connections are secure, and replacing the connection if it shows signs of significant wear. Adhering to these practices helps maintain the efficiency of the engine cooling system.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a history spanning over a century, Cummins is renowned for its quality and innovation in the commercial truck industry. Its product range includes engines, filtration systems, and aftermarket parts, all designed to meet the demanding requirements of commercial vehicles ³.

Compatibility with Cummins Engines

The Water Inlet Connection part number 3944720, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part plays a role in the engine’s cooling system by providing a connection for the water inlet hose, ensuring efficient coolant flow. Below is a detailed breakdown of the engines that are compatible with this part:

ISC Series Engines

• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250

ISL Series Engines

• ISL CM2150
• ISL CM554
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

L Series Engines

• L8.9
• L8.9 CM2670 L134C
• L8.9 L121
• L9.5 L117

QSC and QSL Series Engines

• QSC8.3 CM2880 C102
• 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)

By ensuring the Water Inlet Connection 3944720 is properly installed, users can maintain the integrity of their engine’s cooling system, leading to improved performance and longevity of the engine.

Role of Part 3944720 Water Inlet Connection in Engine Systems

The water inlet connection, specifically part 3944720, is integral to the efficient operation of various engine systems. It facilitates the entry of coolant into the engine block, ensuring that the internal components remain within optimal temperature ranges during operation.

Integration with Cooling System

In the cooling system, the water inlet connection interfaces directly with the engine block and the thermostat housing. It allows coolant to flow from the radiator, through the water pump, and into the engine block. This flow is essential for dissipating heat generated by combustion processes. The design of part 3944720 ensures a secure and leak-free connection, maintaining the integrity of the cooling circuit.

Interaction with Thermostat Housing

The connection between part 3944720 and the thermostat housing is designed to regulate the flow of coolant based on engine temperature. When the engine is cold, the thermostat remains closed, restricting coolant flow and allowing the engine to warm up quickly. As the engine reaches operating temperature, the thermostat opens, and part 3944720 allows coolant to circulate through the engine block, preventing overheating.

Role in Engine Block

Within the engine block, the water inlet connection distributes coolant to various critical areas, including the cylinder heads and the combustion chambers. This distribution is vital for maintaining uniform temperatures across the engine, which enhances performance and longevity. The precise fit and design of part 3944720 ensure that coolant reaches all necessary areas without restriction.

Contribution to Overall Engine Efficiency

Efficient coolant flow, facilitated by part 3944720, contributes to overall engine efficiency. By maintaining optimal temperatures, the engine operates more smoothly, with reduced friction and wear on moving parts. This, in turn, leads to better fuel efficiency and lower emissions.

Support for Ancillary Systems

Beyond the primary cooling function, part 3944720 also supports ancillary systems such as the heater core and the power steering pump. Coolant flowing through the water inlet connection provides the necessary heat exchange for these systems, ensuring they function correctly under varying operating conditions.

Conclusion

In summary, the 3944720 water inlet connection plays a significant role in the thermal management of engine systems, supporting both primary and secondary functions to ensure reliable and efficient engine operation.