3938655
Accessory Drive Cover Gasket
Cummins®

The Accessory Drive Cover Gasket, identified by part number 3938655, is a component manufactured by Cummins, a leading provider of diesel engines and related technologies. This gasket is integral to the operation of heavy-duty trucks, ensuring the efficient and reliable performance of the engine system. Cummins, known for its robust engineering and high-quality products, designs this gasket to meet the demanding requirements of heavy-duty applications.

Function and Operation

The Accessory Drive Cover Gasket serves a vital role in sealing the accessory drive cover to the engine block. This seal is crucial for preventing leaks of engine oil and other fluids that could otherwise compromise engine performance and lead to potential damage. The gasket interfaces with the accessory drive system, which includes components such as the alternator, power steering pump, and air conditioning compressor. By maintaining a secure seal, the gasket ensures that these accessories operate within the intended parameters, contributing to the overall efficiency and reliability of the engine ¹.

Key Features

The Accessory Drive Cover Gasket is engineered with specific design characteristics to ensure optimal performance. It is composed of materials that offer durability and resistance to the high temperatures and pressures encountered in heavy-duty engines. The gasket is designed to fit precisely within the contours of the engine block and accessory drive cover, ensuring a tight and effective seal. Its compatibility with Cummins engines is a testament to its design, which takes into account the unique requirements of these powerful machines. Unique attributes of the gasket, such as its multi-layered construction or the use of advanced sealing compounds, enhance its performance and longevity ².

Benefits

The use of the Accessory Drive Cover Gasket provides several advantages. It contributes to improved engine efficiency by preventing fluid leaks that could lead to decreased performance. The gasket’s durable construction reduces the risk of failure, minimizing the need for frequent replacements and repairs. Additionally, by maintaining a secure seal, the gasket enhances the overall durability of the engine, supporting long-term reliability in heavy-duty applications ³.

Installation Process

Proper installation of the Accessory Drive Cover Gasket is critical for ensuring its effectiveness. The process begins with the preparation of the mating surfaces on the engine block and accessory drive cover, ensuring they are clean and free of debris. The gasket is then carefully positioned, taking care to align it correctly with the sealing surfaces. Once in place, the accessory drive cover is reattached, and the fasteners are tightened to the specified torque settings to ensure a secure fit without over-tightening, which could damage the gasket or the engine components.

Maintenance and Troubleshooting

Regular maintenance of the Accessory Drive Cover Gasket is important for ensuring its continued effectiveness. Inspections should be conducted during routine engine service to check for signs of wear, such as cracking or hardening of the gasket material. If any issues are detected, the gasket should be replaced to prevent potential leaks. Troubleshooting common issues, such as fluid leaks, may involve checking the gasket for proper seating and ensuring that the fasteners are tightened to the correct specifications.

Manufacturer - Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established a reputation for innovation, quality, and reliability in the heavy-duty truck industry. The company’s product range includes engines, filtration systems, emissions solutions, and aftermarket parts, all designed to meet the rigorous demands of commercial and industrial applications. Cummins’ commitment to excellence is reflected in its extensive research and development efforts, which drive continuous improvement and the introduction of advanced technologies in its products.

Accessory Drive Cover Gasket Fitment for Cummins Engines

The Accessory Drive Cover Gasket part number 3938655, manufactured by Cummins, is designed to fit a variety of Cummins engines. This gasket is crucial for sealing the accessory drive cover, ensuring that the engine’s accessories operate efficiently and without leaks.

4B3.9, 6B5.9, 6C8.3, B4.5, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, B6.7 CM2670 B164C, C GAS PLUS CM556, C8.3 G, G8.3, G8.3 CM558, GTA8.3 CM558

These engines, primarily used in various industrial and commercial applications, benefit from the precise fit of the Accessory Drive Cover Gasket. The gasket ensures that the accessory drive cover is sealed properly, preventing any oil or coolant leaks that could compromise engine performance.

ISB CM550, ISB/ISD6.7 CM2150 SN, ISBE CM2150, ISBE CM800, ISBE4 CM850, ISC CM554, ISC CM850, ISL CM554, ISL9 CM2150 SN

The Accessory Drive Cover Gasket part number 3938655 is also compatible with the ISB, ISBE, ISC, and ISL series engines. These engines are known for their reliability and efficiency, and the gasket plays a vital role in maintaining their operational integrity by providing a secure seal.

L8.9, L8.9 CM2670 L134C, L8.9 L121

For the L8.9 series engines, the Accessory Drive Cover Gasket ensures that the accessory drive cover is sealed effectively. This is particularly important for these high-performance engines, where even minor leaks can lead to significant issues.

Each of these engines relies on the Accessory Drive Cover Gasket to maintain a secure seal, ensuring that the engine operates at peak efficiency and reliability. The gasket’s design allows it to fit snugly and effectively in all specified engine models, providing a critical barrier against leaks.

Role of Accessory Drive Cover Gasket in Engine Systems

The Accessory Drive Cover Gasket, part number 3938655, is an essential component in maintaining the integrity and efficiency of various engine systems. It ensures a secure seal between the accessory drive cover and the engine block, preventing oil leaks and maintaining proper lubrication.

Integration with Key Engine Components

1. Air Compressor and Compressor Systems: The gasket plays a significant role in systems involving air compressors and compressors. It ensures that the accessory drive cover, which houses components like the air compressor, remains sealed. This prevents any oil contamination of the compressed air, ensuring the compressor operates efficiently and reliably.

2. Drive and Gear Train Accessories: In systems with front gear train accessories and front gear train accessory drives, the gasket is vital. It maintains the seal around the accessory drive cover, which often encloses the front gear train. This ensures that the gears operate in a clean, oil-free environment, reducing wear and enhancing performance.

3. Fuel Pump Coupling and Housing: When integrated with fuel pump couplings and housings, the gasket ensures that the accessory drive cover, which may house parts of the fuel pump system, remains sealed. This is important for maintaining the cleanliness and efficiency of the fuel pump, as any oil leakage could affect its performance.

4. Flywheel and Housing Components: In systems where the flywheel and housing are part of the accessory drive setup, the gasket ensures that the accessory drive cover, which may enclose the flywheel, is sealed. This prevents oil from entering areas where it could cause slippage or contamination.

5. Kit Spares and Overhaul Kits: For kit spares and overhaul kits that include accessory drive components, the gasket is a key part. It ensures that when the accessory drive cover is reinstalled or replaced, a proper seal is achieved, maintaining the integrity of the engine’s lubrication system.

6. Lower Engine Gasket Kit and Set: When used in conjunction with lower engine gasket kits and sets, the Accessory Drive Cover Gasket complements these components by providing an additional layer of sealing. This is particularly important in complex engine setups where multiple gaskets and seals are used to maintain engine integrity.

7. Mounting and Auxiliary Pump Systems: In systems where auxiliary pumps are mounted on the accessory drive, the gasket ensures that the cover remains sealed. This is important for maintaining the efficiency of the auxiliary pump and preventing any oil from interfering with its operation.

8. Front and Rear Gear Train Accessories: For both front and rear gear train accessories, the gasket ensures that the accessory drive cover, which may house these components, is properly sealed. This is essential for maintaining the cleanliness and efficiency of the gear train, reducing wear, and enhancing performance.

9. Vacuum Pump Systems: In systems involving vacuum pumps, the gasket ensures that the accessory drive cover, which may enclose the vacuum pump, is sealed. This prevents oil from entering the vacuum system, ensuring that the pump operates efficiently and reliably.

Conclusion

In summary, the Accessory Drive Cover Gasket, part number 3938655, is a vital component in various engine systems, ensuring that the accessory drive cover remains sealed and maintaining the overall efficiency and reliability of the engine.