4903490
Captive Sleeve Cap Screw
Cummins®

The 4903490 Captive Sleeve Cap Screw, manufactured by Cummins, is a specialized fastener designed for use in heavy-duty truck components. Cummins, a well-established name in the automotive and heavy-duty truck industry, produces this screw to meet the demanding requirements of truck operations. This component plays a significant role in ensuring the reliability and efficiency of truck systems.

Basic Concepts of Captive Sleeve Cap Screws

A Captive Sleeve Cap Screw is a type of fastener that includes an integrated sleeve or collar. This design allows for secure attachment and alignment in mechanical assemblies. The screw operates by threading into a pre-tapped hole, while the captive sleeve provides additional support and stability. This feature is particularly beneficial in applications where precise alignment and secure fastening are required ¹.

Purpose of the 4903490 Captive Sleeve Cap Screw in Truck Operation

This Cummins part is utilized in various components of heavy-duty trucks. It is commonly found in engine assemblies, transmission systems, and other critical areas where secure and reliable fastening is necessary. This screw supports the structural integrity of these systems by providing a stable and durable connection point. Its role is vital in maintaining the operational efficiency and safety of the truck ².

Key Features of the 4903490 Captive Sleeve Cap Screw

The 4903490 Captive Sleeve Cap Screw is characterized by several key features. Its design includes a robust captive sleeve that enhances alignment and reduces the risk of misplacement during installation. The screw is made from high-strength materials, ensuring durability under heavy loads and harsh conditions. Additionally, its precise threading and robust construction contribute to its reliable performance in demanding applications ³.

Benefits of Using the 4903490 Captive Sleeve Cap Screw

The use of this part offers several advantages. Its design facilitates easier and more secure installation, reducing the likelihood of errors during assembly. The captive sleeve feature ensures that the screw remains aligned, which enhances the overall reliability of the fastening. Furthermore, the screw’s durable construction contributes to longer service life and reduced maintenance requirements ⁴.

Installation and Usage Guidelines

Proper installation of the 4903490 Captive Sleeve Cap Screw involves several steps. Begin by ensuring the mating surface is clean and free of debris. Use a torque wrench to install the screw to the specified torque setting, which ensures a secure yet non-damaging attachment. It is important to follow the manufacturer’s guidelines to avoid over-tightening, which could damage the screw or the surrounding components.

Troubleshooting Common Issues

Common issues with Captive Sleeve Cap Screws may include loosening over time or damage due to excessive force. To address these problems, regular inspections should be conducted to ensure the screws remain tight and undamaged. If loosening is detected, re-torque the screw to the manufacturer’s specifications. In cases of damage, replacement of the screw may be necessary to maintain system integrity.

Maintenance Recommendations

Regular maintenance of the 4903490 Captive Sleeve Cap Screw involves periodic inspections to check for signs of wear or loosening. Cleaning the screw and its surrounding area can prevent corrosion and ensure optimal performance. Replacement should be considered if the screw shows significant wear or if it fails to maintain a secure connection.

Cummins: A Brief Overview

Cummins Inc. is a leading manufacturer in the automotive and heavy-duty truck industry, known for its high-quality engines and components. Founded in 1919, Cummins has built a reputation for innovation and reliability. The company offers a wide range of products, including engines, filtration systems, and aftermarket parts, all designed to meet the rigorous demands of heavy-duty applications.

Role of Part 4903490 Captive Sleeve Cap Screw in Engine Systems

The 4903490 Captive Sleeve Cap Screw is integral to the assembly and functionality of various engine components. In the Actuator Kit, this screw secures the actuator housing, ensuring precise control over the valve operations. Its role is to maintain the structural integrity and alignment of the actuator, which is essential for the accurate modulation of engine parameters.

Within the Fuel Control Module, the 4903490 screw is used to fasten the module’s casing. This ensures that the sensitive electronic components are protected from external vibrations and environmental factors, contributing to the reliable operation of fuel delivery systems.

For the Fuel Pump assembly, the Captive Sleeve Cap Screw is employed to secure the pump housing. This is vital for maintaining the pump’s internal pressure and ensuring that the fuel is delivered consistently to the engine. The screw’s design helps in withstanding the high pressures and temperatures associated with fuel systems.

In the broader context of the Pump systems, whether it be for fuel, oil, or coolant, the 4903490 screw plays a significant role in securing pump covers and housings. This ensures that the pump operates efficiently without leaks, which is fundamental for the engine’s lubrication and cooling processes.

Lastly, in the Fuel System as a whole, the use of the 4903490 screw in various junctures—from the fuel tank to the injectors—ensures that all components are tightly secured. This contributes to the overall safety and performance of the fuel system, preventing issues such as fuel leaks and ensuring consistent fuel pressure.

Conclusion

The 4903490 Captive Sleeve Cap Screw is a vital component in the assembly and operation of heavy-duty truck engines. Its design and features ensure secure and reliable fastening, contributing to the overall efficiency and safety of the vehicle. Proper installation, regular maintenance, and timely replacement are essential to maximize the performance and longevity of this critical part.