3958414
O Ring Seal
Cummins®

The Cummins 3958414 O Ring Seal is a component designed to ensure the integrity of seals within commercial truck engines. Its role is significant in maintaining the efficiency and reliability of the engine’s operation. This seal is part of a broader system that ensures fluids and gases remain contained within their designated pathways, preventing leaks that could lead to engine inefficiency or failure ¹.

Basic Concepts of O Ring Seals

An O Ring Seal is a type of gasket made from a doughnut-shaped piece of elastic material. It functions by creating a seal between two or more parts, typically used in applications where a static seal is required. O Ring Seals are widely used in mechanical systems due to their ability to provide a reliable seal under various conditions, including different temperatures and pressures ².

Purpose of the Cummins 3958414 O Ring Seal

The Cummins 3958414 O Ring Seal plays a specific role in the operation of a truck by ensuring that seals within the engine or other systems remain intact. This seal is designed to fit into grooves or around components where a seal is needed, preventing the escape of fluids or gases. Its function is vital for maintaining the pressure and containment necessary for the engine’s efficient operation ³.

Key Features

The Cummins 3958414 O Ring Seal is characterized by its material composition, typically made from durable elastomers that can withstand the harsh conditions within an engine. Its design specifications include precise dimensions to ensure a proper fit and effective seal. Unique characteristics may include resistance to specific chemicals or temperatures, enhancing its performance in demanding environments.

Benefits

The Cummins 3958414 O Ring Seal offers several benefits, including improved sealing efficiency, which helps maintain system pressure and prevent leaks. Its durability ensures long-term reliability, reducing the need for frequent replacements. Additionally, its contribution to overall system reliability is significant, as it helps prevent issues that could arise from seal failures.

Installation Process

Proper installation of the Cummins 3958414 O Ring Seal involves ensuring the groove or area where the seal will be placed is clean and free of debris. The seal should be lubricated before installation to facilitate fitting and to prevent damage. Using the appropriate tools, the seal is then carefully placed into the groove, ensuring it is seated correctly without twists or folds that could compromise its effectiveness.

Common Issues and Troubleshooting

Common issues with O Ring Seals include leaks or wear over time. Troubleshooting these problems may involve inspecting the seal for signs of damage or deformation. If a leak is detected, the seal may need to be replaced. Regular inspections can help identify potential issues before they lead to more significant problems.

Maintenance Tips

To prolong the life of the Cummins 3958414 O Ring Seal, regular inspection routines are recommended. This includes checking for signs of wear or damage during routine maintenance checks. Recommended replacement intervals should be followed to ensure the seal remains effective. Keeping the area around the seal clean and free of contaminants can also help maintain its integrity.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history dating back to 1919, Cummins has established a reputation for quality and innovation in the diesel engine and related technologies market. Its commitment to excellence and customer satisfaction has made it a trusted name in the industry.

Cummins O Ring Seal 3958414 Compatibility

The Cummins O Ring Seal part number 3958414 is designed to fit a variety of Cummins engines, ensuring a secure seal in various applications. This O ring is commonly used in engines where it provides a critical seal to prevent leaks and maintain system integrity. Below is a detailed breakdown of the engines that this part is compatible with, grouped where applicable.

B Series Engines

• B4.5 RGT
• B5.6 CM2670 B152B
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

ISB Series Engines

• ISB CM2150
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118

ISBE Series Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

ISD Series Engines

• ISD4.5 CM2220 D108

ISL Series Engines

• ISL G CM2180

QSB Series Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB5.9 CM2880 B115
• QSB5.9 CM850

This O ring seal is engineered to meet the rigorous demands of Cummins engines, providing reliable performance and durability. It is essential to verify the specific application of the O ring seal within each engine model to ensure proper fitment and functionality.

Role of Part 3958414 O Ring Seal in Engine Systems

The Part 3958414 O Ring Seal is integral to maintaining the integrity and efficiency of various engine systems. Its application spans across multiple components, ensuring that each system operates within optimal parameters.

Air Cleaner and Breather Systems

In the air cleaner arrangement, the O Ring Seal is positioned to create a secure seal between the air cleaner housing and the engine, preventing unfiltered air from entering the combustion chamber. Similarly, in the crankcase breather system, it ensures that the breather tube and adapter maintain a sealed environment, allowing for the efficient release of gases while preventing external contaminants from entering the crankcase.

Coolant and Plumbing Arrangements

For the compressor coolant and CPR coolant arrangements, the O Ring Seal is utilized at connection points to ensure that coolant flows without leakage. This is vital for maintaining consistent engine temperature and preventing coolant loss, which could lead to overheating.

Crankcase and Valve Cover Systems

In the crankcase and valve cover arrangements, the O Ring Seal is employed to secure the seals at various points, such as the breather fitting and oil filler tube. This ensures that the crankcase remains pressurized correctly and that oil levels are maintained without contamination from external sources.

Full and Lower Engine Gasket Kits

Within the full engine gasket set and lower engine gasket kit, the O Ring Seal complements traditional gaskets by providing additional sealing at critical junctions. This is particularly important in the oil fill and oil filler tube areas, where it prevents oil leaks and ensures that the lubrication system remains intact.

Turbocharger and Vent Fittings

In the turbocharger plumbing, the O Ring Seal is used to ensure that the turbocharger’s intake and exhaust systems are sealed properly, enhancing performance and efficiency. Additionally, in the vent fitting applications, it helps maintain the correct pressure within the engine compartments, aiding in the overall stability and performance of the engine.

Rocker Lever and Front Gear Cover

The O Ring Seal also plays a role in the rocker lever arrangement by ensuring that the seals around the rocker arms are maintained, which is essential for consistent valve operation. In the front gear cover, it helps in sealing the front of the engine, protecting internal components from debris and maintaining the integrity of the lubrication system.

Access Hole Cover

Lastly, in the access hole cover, the O Ring Seal is used to ensure that any maintenance access points remain sealed when not in use, protecting the engine’s internals from contaminants and ensuring that all systems operate within designed parameters.

Conclusion

The Cummins 3958414 O Ring Seal is a critical component in maintaining the efficiency and reliability of commercial truck engines. Its role in preventing leaks and ensuring system integrity across various engine components underscores its importance in engine operation. Regular maintenance and proper installation are key to maximizing the effectiveness of this part.