4894641
Captive Washer Cap Screw
Cummins®

The 4894641 Captive Washer Cap Screw is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw is significant in the context of commercial truck maintenance and operation, providing reliable fastening solutions that contribute to the overall efficiency and safety of truck systems ¹.

Basic Concepts of Captive Washer Cap Screws

A captive washer cap screw is a type of fastener that includes an integrated washer, which remains attached to the screw throughout its use. This design ensures that the washer does not become misplaced during assembly or disassembly, simplifying the fastening process. Captive washer cap screws are commonly used in mechanical assemblies where secure and consistent fastening is required, such as in engine components, chassis parts, and various other truck systems ².

Purpose of the 4894641 Captive Washer Cap Screw in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of commercial trucks. It is utilized in areas where secure fastening is crucial, such as in engine mounts, transmission components, and chassis assemblies. The screw’s design helps in maintaining the integrity of these connections, ensuring that parts remain securely fastened under various operating conditions ³.

Key Features

The 4894641 Captive Washer Cap Screw boasts several key features that enhance its performance and reliability. Its design includes an integrated washer that remains captive, reducing the risk of loss during installation. The screw is made from high-quality materials, ensuring durability and resistance to corrosion. Additionally, its precise threading and robust construction contribute to a secure and lasting connection ⁴.

Benefits

Using the 4894641 Captive Washer Cap Screw offers several benefits. The integrated washer simplifies the assembly process, reducing the time and effort required for installation. This screw also provides enhanced sealing capabilities, helping to prevent leaks and maintain system integrity. Furthermore, its durable construction ensures long-lasting performance, even under demanding conditions ⁵.

Installation Guidelines

To ensure optimal performance and longevity, follow these steps for the proper installation of the 4894641 Captive Washer Cap Screw:

1. Clean the installation area to remove any debris or contaminants.
2. Align the screw with the designated hole.
3. Use the appropriate tool to tighten the screw to the recommended torque specification, ensuring a secure fit without over-tightening ⁶.

Troubleshooting Common Issues

Common issues with the 4894641 Captive Washer Cap Screw may include loosening or corrosion. To address these problems:

• Regularly inspect the screw for signs of wear or corrosion.
• If loosening is detected, re-tighten the screw to the specified torque.
• In cases of corrosion, consider replacing the screw to maintain system integrity ⁷.

Maintenance Tips

To prevent issues and ensure continued reliable operation of the 4894641 Captive Washer Cap Screw, consider the following maintenance tips:

• Perform regular inspections to check for signs of wear, corrosion, or loosening.
• Clean the screw and surrounding area to remove any buildup that could affect performance.
• Follow the manufacturer’s recommendations for torque specifications during installation and re-tightening ⁸.

Cummins: A Brief 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 high-quality, reliable components. Their product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial trucking applications ⁹.

Cummins Captive Washer Cap Screw 4894641 Compatibility

The Cummins Captive Washer Cap Screw part number 4894641 is a versatile component designed to fit a variety of Cummins engines. Below is a detailed description of its compatibility across different engine models:

B4.5 Series Engines

• B4.5
• B4.5 CM2350 B129B
• B4.5 RGT

This part is suitable for securing components in the B4.5 series engines, ensuring reliable fastening in various applications.

B6.7 Series Engines

• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125
• B6.7S

This screw is compatible with the B6.7 series engines, providing a secure fit for various assembly needs.

F3.8 Series Engines

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102

This part is also suitable for the F3.8 series engines, offering a reliable fastening solution.

F4.5 Series Engines

• F4.5 CM2620 F139B

This screw fits the F4.5 series engines, ensuring secure fastening in various applications.

G8.3 Series Engines

• G8.3
• G8.3 CM558
• GTA8.3 CM558

This part is compatible with the G8.3 series engines, providing a secure fit for various assembly needs.

ISB Series Engines

• ISB CM2150
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104

This screw fits the ISB series engines, ensuring reliable fastening in various applications.

C GAS PLUS Series Engines

• C GAS PLUS CM556

This part is also compatible with the C GAS PLUS series engines, providing a secure fit for various assembly needs.

D4.0 Series Engines

• D4.0 CM2620 D103B

This screw fits the D4.0 series engines, ensuring secure fastening in various applications.

The Cummins Captive Washer Cap Screw 4894641 is engineered to provide a reliable and secure fastening solution across a wide range of Cummins engine models. Its compatibility with multiple engine series underscores its versatility and importance in maintaining the integrity of engine assemblies ¹⁰.

Role of Part 4894641 Captive Washer Cap Screw in Engine Systems

In engine systems, the 4894641 Captive Washer Cap Screw is instrumental in securing various components, ensuring their stability and proper function.

Flywheel Assembly

Within the flywheel assembly, this Cummins part is utilized to fasten the flywheel to the crankshaft. This secure attachment is essential for transmitting rotational energy from the engine to the transmission system. The screw’s design, incorporating a captive washer, enhances the fastening process by providing consistent pressure distribution and preventing the screw from loosening over time due to vibrations ¹¹.

Mounting Structures

For mounting structures, the 4894641 Captive Washer Cap Screw plays a significant role in attaching the engine to the vehicle’s frame. This secure connection is vital for maintaining the engine’s alignment and stability during operation. The captive washer feature ensures that the screw remains in place, reducing the risk of detachment and potential engine damage ¹².

Conclusion

In summary, the 4894641 Captive Washer Cap Screw is a key component in maintaining the integrity and functionality of engine systems by providing reliable fastening solutions for critical parts such as the flywheel and mounting structures. Its design and features contribute to the overall efficiency and safety of commercial truck systems.