4940089
Water Inlet Connection
Cummins®

Introduction

The Water Inlet Connector 4940089, produced by Cummins, is a critical component in the cooling systems of heavy-duty trucks. This part facilitates the flow of coolant into the engine block, playing a significant role in maintaining optimal engine temperature, which is essential for efficient operation and longevity ¹.

Basic Concepts of Water Inlet Connectors

A water inlet connector is a vital component within the engine’s cooling system, allowing coolant to enter the engine block. Its primary function is to ensure a steady flow of coolant, which absorbs heat from the engine and dissipates it through the radiator. This process is essential for maintaining engine temperature within a specified range, preventing overheating, and ensuring efficient engine performance ².

Purpose of the 4940089 Water Inlet Connector

The 4940089 Water Inlet Connector is designed to serve as a conduit for coolant in heavy-duty truck engines. It interfaces with the engine block and the coolant system, allowing for the efficient transfer of coolant. This part ensures that coolant is distributed evenly throughout the engine, aiding in temperature regulation and contributing to the overall reliability and performance of the engine ³.

Key Features

The 4940089 Water Inlet Connector is characterized by several key features that enhance its performance. It is constructed from durable materials, ensuring resistance to corrosion and wear. The design includes precise fittings and seals to prevent leaks and ensure a secure connection within the cooling system. Additionally, the connector may feature unique elements such as reinforced areas or specialized coatings to improve its functionality and longevity in demanding applications ⁴.

Benefits

The benefits of the 4940089 Water Inlet Connector include improved cooling efficiency, which contributes to better engine performance and longevity. Its durable construction ensures reliability in heavy-duty applications, where the engine is subjected to high stress and temperatures. The design of the connector also aids in maintaining a consistent flow of coolant, which is crucial for effective engine cooling ⁵.

Installation Process

Installing the 4940089 Water Inlet Connector requires careful attention to ensure a secure and leak-free connection. The process involves cleaning the mating surfaces, applying any necessary sealants, and using the appropriate tools to tighten the connector to the specified torque. It is important to follow the manufacturer’s guidelines to ensure proper installation and avoid potential issues such as leaks or improper coolant flow ⁶.

Troubleshooting Common Issues

Common issues with water inlet connectors include leaks and blockages. Leaks can often be traced to improper installation, worn seals, or corrosion. Blockages may result from debris in the coolant system or a buildup of scale. Troubleshooting steps include inspecting the connector and seals for damage, cleaning the coolant system, and ensuring that the connector is properly installed and tightened ⁷.

Maintenance Tips

Regular maintenance of the 4940089 Water Inlet Connector is important for ensuring optimal performance and longevity. This includes periodic inspection for signs of wear or damage, cleaning the connector and surrounding areas to prevent buildup, and ensuring that the coolant system is free of contaminants. Following the manufacturer’s recommended maintenance schedule will help to identify and address potential issues before they lead to more significant problems ⁸.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and quality, Cummins has established a strong reputation in the automotive industry, particularly for its heavy-duty truck components. The company’s commitment to excellence is reflected in its wide range of products, which are designed to meet the demanding requirements of various applications ⁹.

Compatibility with Cummins Engines

The Water Inlet Connector 4940089 is compatible with several Cummins engines, including the ISB/ISD4.5 CM2150 B119, ISB/ISD6.7 CM2150 SN, ISBE CM2150, and ISBE4 CM850. These engines are part of the Cummins B and C series, known for their robust design and reliability in various applications, from heavy-duty trucks to industrial machinery. The connector’s design ensures a secure fit and efficient water flow, contributing to the engine’s longevity and performance ¹⁰.

Integration with Engine Components

1. Water Pump: The Water Inlet Connector interfaces directly with the water pump, allowing coolant to be drawn from the reservoir and pumped into the engine block. This connection is vital for maintaining a consistent coolant flow, which is necessary for efficient heat dissipation ¹¹.

2. Engine Block: Once the coolant is pumped through the Water Inlet Connector, it enters the engine block. Here, the coolant circulates through passages designed to absorb heat from the combustion chambers and other high-temperature areas ¹².

3. Thermostat Housing: The connector is often situated near the thermostat housing. This proximity allows for regulated coolant flow based on engine temperature, ensuring that the engine operates within optimal thermal conditions ¹³.

4. Coolant Reservoir: The Water Inlet Connector is also linked to the coolant reservoir. This connection enables the system to maintain proper coolant levels, preventing overheating and ensuring the engine remains at an efficient operating temperature ¹⁴.

5. Heater Core: In many engine systems, the Water Inlet Connector plays a role in directing coolant flow to the heater core. This ensures that the cabin heating system functions correctly, providing warmth to the vehicle’s interior ¹⁵.

6. Radiator: The connector is part of the pathway that leads coolant from the engine block to the radiator. Here, the coolant releases absorbed heat to the outside environment, cooling down before re-entering the engine ¹⁶.

Conclusion

The Water Inlet Connector 4940089 by Cummins is a vital component in the cooling systems of heavy-duty engines. Its role in facilitating the flow of coolant into the engine block ensures optimal engine temperature, contributing to efficient operation and longevity. Proper installation, regular maintenance, and understanding its integration with other engine components are essential for maximizing the performance and reliability of this Cummins part.