3929751
Accessory Drive Cover Gasket
Cummins®

The Accessory Drive Cover Gasket, identified by Part #3929751, is a component manufactured by Cummins, a well-established name in the commercial truck industry. This gasket plays a significant role in the operation of heavy-duty trucks by ensuring the integrity of the accessory drive system.

Function and Operation

The Accessory Drive Cover Gasket is designed to seal the accessory drive cover to the engine block. This sealing function is vital for the proper operation of driven accessories such as alternators, power steering pumps, and air conditioning compressors. By maintaining a secure seal, the gasket helps to prevent oil leaks and ensures that these accessories receive the necessary power and lubrication for efficient operation ⁴.

Key Features

The Accessory Drive Cover Gasket is characterized by its robust design and material composition. It is crafted from materials that offer durability, resistance to oil and heat, and a precise fit. These characteristics ensure that the gasket can withstand the demanding conditions within an engine compartment while providing an effective seal. The precise fit is particularly important, as it ensures that the gasket aligns correctly with the accessory drive cover and engine block, facilitating optimal performance ¹.

Benefits

The use of the Accessory Drive Cover Gasket offers several advantages. Primarily, it prevents oil leaks, which can lead to engine damage and decreased performance. Additionally, by ensuring the proper function of the accessory drive system, the gasket contributes to the overall efficiency and reliability of the engine. This is particularly important in heavy-duty trucks, where the accessory drive system plays a significant role in vehicle operation ².

Installation and Maintenance

Proper installation of the Accessory Drive Cover Gasket is key to its effectiveness. This involves careful surface preparation to ensure a clean and smooth mating surface between the gasket and the engine block. Torque specifications should be followed precisely during installation to avoid over-tightening, which can damage the gasket, or under-tightening, which can lead to leaks. Regular maintenance checks are recommended to ensure the gasket remains in good condition and continues to provide an effective seal ³.

Troubleshooting Common Issues

Common issues associated with the Accessory Drive Cover Gasket include leaks or failure due to wear and tear or improper installation. If a leak is detected, it is important to inspect the gasket for signs of damage or misalignment. Repair procedures may involve replacing the gasket and ensuring that the accessory drive cover and engine block surfaces are clean and properly aligned before reinstallation ⁴.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a strong reputation in the commercial truck industry for producing reliable and high-performance components. The company’s product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of heavy-duty applications.

Accessory Drive Cover Gasket 3929751 Compatibility with Cummins Engines

The Accessory Drive Cover Gasket part number 3929751, manufactured by Cummins, is designed to fit a variety of Cummins engines. This gasket is crucial for maintaining the integrity of the engine’s accessory drive system by sealing the cover to prevent leaks and ensuring proper function of the components it encases.

Engine Compatibility

4B3.9, 6B5.9, 6C8.3, B3.3, B3.9 G, B4.5, B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, C8.3 G, G5.9, G5.9 CM558

These engines, primarily used in various industrial and heavy-duty applications, benefit from the use of the 3929751 gasket. It ensures that the accessory drive cover is properly sealed, which is vital for maintaining engine performance and longevity.

ISB CM550, ISB/ISD6.7 CM2150 SN, ISB3.9 CM2220 B107, ISB5.9 CM2880 B110, ISB5.9 CM2880 B127, ISB5.9 CM2880 B140, ISB5.9 CM2880 B149, ISB5.9G CM2180

The ISB series engines, known for their reliability and efficiency, also utilize the 3929751 gasket. This gasket is essential for these engines as it helps in maintaining the seal around the accessory drive cover, ensuring that the engine operates smoothly without any leaks.

ISBE CM800, ISBE4 CM850, ISC CM554, ISL CM554

The ISBE, ISC, and ISL series engines, which are often found in agricultural and construction equipment, also require the 3929751 gasket. This gasket ensures that the accessory drive cover remains sealed, which is critical for the proper functioning of the engine’s accessories and overall system integrity.

By using the 3929751 Accessory Drive Cover Gasket, engine owners can ensure that their engines remain in optimal condition, free from leaks and other issues that can arise from a compromised seal.

Role of Part 3929751 Accessory Drive Cover Gasket in Engine Systems

The Accessory Drive Cover Gasket, part number 3929751, is an essential component in ensuring the proper functioning and sealing of various engine systems. This gasket is specifically designed to fit between the accessory drive cover and the engine block, providing a seal that prevents leaks and maintains the integrity of the engine’s lubrication and cooling systems.

Integration with Key Components

1. Accessory Drive Cover: The primary role of the Accessory Drive Cover Gasket is to seal the accessory drive cover to the engine block. This cover houses various driven components such as the compressor, auxiliary pumps, and gear trains.

2. Compressor: In systems where a compressor is driven by the engine, the gasket ensures that no lubricant escapes from the engine block to the compressor housing, maintaining efficient operation.

3. Air and Hydraulic Systems: The gasket also plays a part in sealing the air and hydraulic drive systems. It ensures that the hydraulic pump adapter and hydraulic pump drives operate within a sealed environment, preventing contamination and ensuring optimal performance.

4. Cover Mounting Plate and Cover Plate: These plates are often used to mount various accessories and drives. The gasket ensures a tight seal between these plates and the engine block, which is vital for the operation of components like the front and rear gear train accessory drives.

5. Gear and Marine Housing: In marine applications, the Accessory Drive Cover Gasket seals the gear housing to the engine block, which is critical for the operation of the marine drive system. It prevents seawater from entering the lubrication system, which could lead to corrosion and failure.

6. Lower Engine Gasket Kit and Set: The Accessory Drive Cover Gasket works in conjunction with the lower engine gasket kit and set to provide a comprehensive sealing solution for the engine. This ensures that all driven accessories operate efficiently without lubricant loss.

7. Lubricating Oil Scavenge Pump and Auxiliary Pump: The gasket ensures that the lubricating oil scavenge pump and any auxiliary pumps driven by the engine are sealed properly. This maintains the correct oil pressure and flow necessary for the engine’s lubrication system.

8. Raw Water and Vacuum Pumps: In systems where raw water and vacuum pumps are driven by the engine, the gasket prevents any cross-contamination between the pump systems and the engine’s lubrication system.

9. Service Coupling 2009 Assembly and Gasket Coupling Kits: The gasket is compatible with various service coupling assemblies and gasket coupling kits, ensuring a consistent seal across different engine configurations and maintenance procedures.

10. Short Block Kit and Transfer Pump & Drive: When integrating with a short block kit or transfer pump and drive system, the Accessory Drive Cover Gasket ensures that all driven components are sealed effectively, contributing to the overall reliability and performance of the engine system.

Conclusion

The Accessory Drive Cover Gasket, part number 3929751, is a critical component in maintaining the integrity and efficiency of heavy-duty engines. By ensuring a secure seal between the accessory drive cover and the engine block, this Cummins part prevents oil leaks, maintains proper lubrication, and supports the efficient operation of driven accessories. Its robust design and material composition make it suitable for the demanding conditions within an engine compartment. Proper installation and regular maintenance are essential to maximize the benefits of this gasket, ensuring long-term engine performance and reliability.