3941990
Oil Filler Connection
Cummins®

The 3941990 Oil Filler Connection, manufactured by Cummins, is a critical component for the maintenance and operation of heavy-duty trucks. This part facilitates the addition of oil to the engine, ensuring the lubrication system functions effectively. Cummins is renowned in the automotive industry for producing reliable and high-quality components that enhance the efficiency and longevity of truck engines ¹.

Purpose and Function

The Oil Filler Connection plays a role in the lubrication system by allowing for the addition of oil. It ensures the engine maintains optimal lubrication levels, which is essential for reducing friction between moving parts, dissipating heat, and protecting the engine from wear and damage. By providing a secure and efficient means to add oil, this component helps maintain the engine’s performance and durability ².

Key Features

The 3941990 is characterized by its robust design and construction. It is made from high-quality materials that offer resistance to wear and corrosion, ensuring longevity in demanding operating conditions. The connection features advanced sealing mechanisms that prevent oil leaks, maintaining the integrity of the lubrication system. Additionally, its design may include unique elements that enhance ease of use and compatibility with various engine types ³.

Benefits

Using the 3941990 offers several advantages. Its improved sealing mechanisms reduce the risk of oil leaks, which can lead to engine damage and increased maintenance costs. The design of the connection also facilitates ease of use during oil changes, contributing to more efficient maintenance routines. Furthermore, by ensuring proper lubrication, this component plays a part in enhancing engine longevity and performance.

Installation Process

Installing the 3941990 requires careful attention to detail to ensure a secure and effective fit. Preparatory steps include cleaning the installation area to remove any debris that could interfere with the seal. The necessary tools for installation may vary, but typically include wrenches for tightening and possibly a torque wrench to ensure the connection is fastened to the manufacturer’s specifications. Following the manufacturer’s guidelines for installation is crucial to avoid damage to the component or the engine.

Maintenance and Care

Regular maintenance of the Oil Filler Connection is important to ensure its longevity and proper function. This includes periodic inspections for signs of wear or damage, cleaning the connection and surrounding area to prevent contamination, and checking the seals for any signs of leakage. If any issues are detected, it may be necessary to replace the connection to maintain the integrity of the lubrication system.

Troubleshooting Common Issues

Common problems associated with Oil Filler Connections can include leaks or difficulty in adding oil. Troubleshooting these issues may involve inspecting the seals for damage or wear, ensuring the connection is properly tightened, and cleaning the area around the connection to remove any debris that could interfere with its function. Addressing these issues promptly can help prevent more significant problems with the engine’s lubrication system.

Manufacturer - Cummins

Cummins is a manufacturer with a strong reputation in the automotive industry, particularly for its products designed for heavy-duty trucks. With a history of innovation and quality, Cummins offers a wide range of components that are engineered to enhance the performance, efficiency, and reliability of truck engines. Their commitment to excellence is reflected in the design and construction of parts like the 3941990.

Compatibility of Oil Filler Connection Part 3941990 with Cummins Engines

The 3941990, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is essential for maintaining the integrity of the engine’s oil system by providing a secure connection for the oil filler cap. Below is a detailed description of its compatibility across different engine models:

G-Series Engines

• G8.3
• G8.3 CM558

GTA-Series Engines

• GTA8.3 CM558

ISC-Series Engines

• ISC CM554

ISL-Series Engines

• ISL CM554

L-Series Engines

• L9.3 L105

QSC-Series Engines

• QSC8.3 CM554

QSL-Series Engines

• QSL9 CM554
• QSL9 G CM558
• QSL9.3 CM2880 L113

This part ensures a proper seal and connection for the oil filler cap, which is critical for maintaining the correct oil level and preventing leaks. The design of the Oil Filler Connection part 3941990 is compatible with the specific configurations and requirements of these Cummins engines, ensuring a reliable fit and function.

Role of Part 3941990 Oil Filler Connection in Engine Systems

The 3941990 is an integral component in the arrangement of an engine’s lubrication system. It serves as the primary interface for replenishing engine oil, ensuring that the lubrication system maintains optimal oil levels.

Integration with Oil Fill System

1. Oil Fill Process: The Oil Filler Connection is strategically positioned to facilitate the oil fill process. It allows for the introduction of fresh oil into the engine, typically through a cap or a threaded fitting. This connection point is usually located on the engine’s cylinder head or the top of the valve cover, providing easy access for maintenance personnel.

2. Sealing and Containment: Once the oil is introduced through the Oil Filler Connection, it flows into the crankcase, where it is distributed to various engine components. The design of this part ensures a secure seal, preventing oil leaks and maintaining the integrity of the lubrication system.

3. Dipstick Access: In many engine designs, the Oil Filler Connection also houses the dipstick tube. This allows for regular monitoring of oil levels, ensuring that the engine operates within safe parameters. The dipstick provides a quick and reliable method for checking oil levels, which is essential for routine maintenance.

4. Compatibility with Other Components: The Oil Filler Connection must be compatible with other components in the lubrication system, such as the oil filter and the oil pump. Proper integration ensures that oil flows smoothly through the system, reducing the risk of blockages or restrictions that could impair engine performance.

5. Maintenance and Replacement: During engine maintenance or oil changes, the Oil Filler Connection plays a key role. It must be securely tightened after oil addition to prevent any oil from escaping. In cases where the connection shows signs of wear or damage, it may need to be replaced to maintain the efficiency of the lubrication system.

Conclusion

In summary, the 3941990 Oil Filler Connection is a fundamental element in the engine’s oil fill arrangement, contributing to the overall reliability and performance of the lubrication system. Its robust design, compatibility with various Cummins engines, and role in maintaining optimal lubrication levels make it an essential component for heavy-duty truck maintenance.