3821783
Captive Washer Cap Screw
Cummins®

The Captive Washer Cap Screw, identified by Part #3821783, is a component manufactured by Cummins, a renowned name in the automotive and heavy-duty truck parts industry. This screw plays a significant role in the maintenance and operation of commercial trucks, ensuring both structural integrity and performance. Cummins, with its extensive history and expertise in manufacturing automotive components, provides a reliable solution for the demanding requirements of commercial vehicle maintenance.

Basic Concepts

A Captive Washer Cap Screw is a type of fastener that includes an integrated washer, which is held captive by a slot or groove in the screw’s shank. This design allows for efficient installation and reduces the risk of washer loss during assembly. The primary function of this screw is to secure components together while distributing the clamping force more evenly across the joined surfaces, which can enhance the stability and durability of the assembly. Its application spans various mechanical assemblies, particularly in environments where vibration and movement are common ¹.

Role in Truck Operation

The 3821783 Captive Washer Cap Screw is utilized in several critical areas within commercial trucks. It plays a role in securing components that are subject to significant stress and vibration, such as engine mounts, body panels, and chassis components. By ensuring these parts remain firmly in place, the screw contributes to the overall structural integrity of the truck. Additionally, its design helps in maintaining the alignment and performance of mechanical systems, which is vital for the safe and efficient operation of commercial vehicles.

Key Features

The 3821783 Captive Washer Cap Screw is distinguished by its robust design and high-quality material composition. It is crafted from durable materials that offer resistance to corrosion and wear, ensuring longevity in demanding environments. The captive washer feature enhances its functionality by simplifying the installation process and providing a more secure fastening solution. This screw’s design also includes precise threading and a head style that facilitates easy tightening and removal, contributing to its overall effectiveness in commercial truck applications.

Benefits

Utilizing the 3821783 Captive Washer Cap Screw offers several advantages. Its design promotes improved reliability by reducing the likelihood of washer displacement during installation. The ease of installation it provides can lead to more efficient maintenance procedures, saving time and labor costs. Furthermore, its enhanced performance in demanding environments ensures that commercial trucks can operate under a wide range of conditions without compromising structural integrity or component alignment.

Troubleshooting and Maintenance

Common issues with Captive Washer Cap Screws may include loosening over time due to vibration or wear. Regular inspection and tightening can help maintain their effectiveness. In cases where screws show signs of corrosion or damage, replacement is recommended to prevent failure. Proper torque settings during installation are crucial to ensure the screw achieves the desired clamping force without overtightening, which could lead to damage ².

About Cummins

Cummins 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 itself as a trusted provider of automotive components, known for its commitment to quality, innovation, and customer satisfaction. The company’s expertise in engine and component manufacturing is reflected in its wide range of products, designed to meet the rigorous demands of commercial and industrial applications.

Cummins Captive Washer Cap Screw 3821783 Compatibility

The Cummins Captive Washer Cap Screw part number 3821783 is a versatile component designed to fit a variety of Cummins engines. This screw is engineered to provide a secure fastening solution, ensuring that components remain tightly secured during operation. Below is a detailed overview of the engines with which this part is compatible:

Compatible Engines

• 15N CM2380 M104B
• 6B5.9
• 6C8.3
• B5.6 CM2670 B152B
• B6.7 CM2670 B153B
• C GAS PLUS CM556
• C8.3 G
• ISBE CM2150
• ISBE4 CM850
• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250
• ISL CM2150
• ISL CM554
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250
• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN
• ISX CM570
• ISX CM870
• ISX CM871

Grouping of Compatible Engines

The Cummins Captive Washer Cap Screw 3821783 is compatible with a broad range of Cummins engines, which can be grouped based on their model series and specifications:

• CM2150 Series:

  • ISBE CM2150
  • ISC CM2150
  • ISL CM2150
  • ISL9 CM2150 SN

• CM554 Series:

  • ISC CM554
  • ISL CM554

• CM570 Series:

  • ISC CM570
  • ISM CM570
  • ISM CM570/870
  • ISX CM570

• CM850 Series:

  • ISBE4 CM850
  • ISC CM850

• CM870 Series:

  • ISX CM870

• CM871 Series:

  • ISX CM871

• CM876 Series:

  • ISM CM876
  • ISM11 CM876 SN

• CM2250 Series:

  • ISC8.3 CM2250
  • ISL9 CM2250

• CM2380 Series:

  • 15N CM2380 M104B

• CM2670 Series:

  • B5.6 CM2670 B152B
  • B6.7 CM2670 B153B

• CM556 Series:

  • C GAS PLUS CM556

• Others:

  • 6B5.9
  • 6C8.3
  • C8.3 G
  • ISL G CM2180

This comprehensive compatibility ensures that the screw can be used across various engine models, providing a reliable fastening solution for different applications within the Cummins engine family.

Role of Part 3821783 Captive Washer Cap Screw in Engine Systems

The Part 3821783 Captive Washer Cap Screw is integral to the secure assembly and operation of various engine components. Its application ensures the stability and integrity of connections across multiple systems within the engine.

Accessories and Wiring Arrangement

In the accessories and wiring arrangement, the Captive Washer Cap Screw is employed to fasten wiring harnesses and electronic control module wiring securely. This ensures that the harnesses remain in place and are not subject to vibrations that could lead to disconnection or damage.

Compressor Coolant and Turbocharger Arrangement

For the compressor coolant arrangement and turbocharger, the screw plays a significant role in maintaining the structural integrity of the connections. It secures the compressor coolant plumbing and turbocharger air filter, ensuring that these components remain firmly in place under operational stress.

Water Outlet and Front Gear Cover

At the water outlet and front gear cover, the Captive Washer Cap Screw is used to secure these covers, preventing leaks and ensuring that the covers remain intact during engine operation. This is particularly important for maintaining the pressure and flow of coolant within the system.

Hand Hole and Engine Brake 411 E Kit

In the hand hole and engine brake 411 E kit, the screw ensures that these components are securely attached to the engine housing. This is essential for maintaining the structural integrity of the engine and ensuring that these components do not become dislodged during operation.

Flywheel and Top-Level Assembly Housing

The flywheel top-level assembly housing and the flywheel itself rely on the Captive Washer Cap Screw to secure various connections. This includes the flywheel RPTO housing and the overall flywheel location, ensuring that these critical components remain stable and operational.

Fuel and Oil Systems

In the fuel plumbing and oil seal kit, the screw is used to secure fuel lines and oil cooler water plumbing. This ensures that there are no leaks in the fuel system and that the oil seal kit remains effectively in place, contributing to the overall efficiency and safety of the engine.

Radiator and Rear Crank Seal Kit

Finally, in the radiator and rear crank seal kit, the Captive Washer Cap Screw secures the radiator plumbing and the rear crank seal, ensuring that these components function correctly and do not fail under the stress of engine operation.

Conclusion

Overall, the Part 3821783 Captive Washer Cap Screw is a versatile fastener that plays a key role in the secure and efficient operation of various engine systems. Its robust design, high-quality material composition, and ease of installation make it an essential component for maintaining the structural integrity and performance of commercial trucks and engines.