3417474
Captive Washer Cap Screw
Cummins®

Introduction to Captive Washer Cap Screws

Captive washer cap screws are essential in various mechanical assemblies, particularly in commercial truck engines. These screws feature an integrated washer that ensures a firm grip, preventing loosening due to vibrations or thermal expansion. The cap screw design allows for straightforward installation and removal, making it a preferred choice in high-stress environments where reliability is crucial ¹.

The Role of the 3417474 Captive Washer Cap Screw in Truck Engines

The 3417474 captive washer cap screw by Cummins is meticulously engineered for truck engines. Its primary function is to secure various engine components, ensuring they remain tightly fastened during operation. This is vital for maintaining engine integrity and preventing potential failures that could result in costly downtime. The secure fastening provided by these screws is crucial in the high-vibration environment of a truck engine, where even minor component movement can lead to significant issues ².

How the 3417474 Captive Washer Cap Screw Works

The 3417474 captive washer cap screw functions by threading into a pre-tapped hole and utilizing the integrated washer to distribute the load uniformly. This design mitigates the risk of over-tightening, which can strip the threads or damage the fastener. The cap screw is equipped with a hexagonal head, allowing for precise torque application using a wrench or socket. This feature ensures that the screw can be tightened to the manufacturer’s specified torque, enhancing the reliability and longevity of the fastening ³.

Maintenance and Troubleshooting of the 3417474 Captive Washer Cap Screw

Regular maintenance of the 3417474 captive washer cap screw is crucial to ensure its ongoing effectiveness. Mechanics should routinely inspect the screws for signs of wear, corrosion, or damage during engine maintenance. Early detection of any issues allows for timely replacement of the screws, preventing potential engine failure.

When troubleshooting, if an engine component secured by a 3417474 captive washer cap screw becomes loose, it may signal a problem with the screw or the surrounding components. A thorough investigation into the root cause is necessary to address the issue promptly and prevent further damage. This proactive approach to maintenance and troubleshooting helps maintain engine performance and reliability ⁴.

Cummins Engines Utilizing the 3417474 Captive Washer Cap Screw

The 3417474 captive washer cap screw is a critical component in various Cummins engine models, ensuring secure fastening in numerous engine applications. Below are the engine series and models that incorporate this part:

ISM Series Engines

• ISM CM570
• ISM CM570/870
• ISM CM876
• ISM11 CM876 SN

ISX Series Engines

• ISX CM570
• ISX CM870
• ISX CM871
• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

L10 GAS Engine

• L10 GAS

M11 Series Engines

• M11 CELECT
• M11 CELECT PLUS
• M11 MECHANICAL

QSC Series Engines

• QSC8.3 CM850(CM2850)

QSK Series Engines

• QSK60 G CM2358 K110

QSM and QST Series Engines

• QSM11 CM570
• QST30 CM2350 T101
• QST30 CM552

QSX Series Engines

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

X15 Series Engines

• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B

Role of Part 3417474 Captive Washer Cap Screw in Engine Systems

The 3417474 captive washer cap screw is instrumental in ensuring the secure assembly and operation of various engine components. It plays a significant role in maintaining the integrity and functionality of the following systems:

Corrosion Resistor

The 3417474 captive washer cap screw ensures that components remain tightly sealed, preventing moisture and other corrosive elements from infiltrating sensitive areas, thereby prolonging the lifespan of the corrosion resistor.

Cylinder Block Cover

The cylinder block cover requires a robust fastening solution to maintain a secure seal around the cylinder block. The 3417474 captive washer cap screw provides the necessary tension and stability, ensuring that the cover remains in place under varying engine conditions.

Electronic Control Module Wiring Harness

For the electronic control module wiring harness, secure fastening is essential to prevent wire displacement or damage. The 3417474 captive washer cap screw helps maintain the structural integrity of the harness, ensuring reliable electrical connections.

Engine Oil Cooler

In the engine oil cooler system, the 3417474 captive washer cap screw is used to fasten components that are exposed to high temperatures and pressures. Its design ensures a tight seal, preventing leaks and maintaining efficient oil flow.

Fuel Control Module

The fuel control module demands precise and secure mounting to function correctly. The 3417474 captive washer cap screw ensures that all connections are stable, allowing the module to regulate fuel delivery accurately.

Fuel Filter Mounting and Plumbing

For fuel filter mounting and plumbing, the 3417474 captive washer cap screw provides the necessary stability to keep the fuel lines and filters in place. This ensures consistent fuel flow and prevents leaks that could compromise engine performance.

Fuel Pump Coupling and Mounting

In the fuel pump system, the 3417474 captive washer cap screw is vital for securing the fuel pump coupling and mounting. This ensures that the fuel pump operates efficiently without any risk of detachment or misalignment.

Hand Hole Cover

The hand hole cover requires a fastening solution that can withstand regular access and exposure to engine vibrations. The 3417474 captive washer cap screw offers the durability needed to keep the cover securely in place.

Oil Pan

Securing the oil pan is essential for containing engine oil and protecting internal components. The 3417474 captive washer cap screw provides a reliable fastening method, ensuring the oil pan remains intact during engine operation.

Product Installation Package

During the installation of various engine components, the 3417474 captive washer cap screw is often included in product installation packages. It facilitates the secure assembly of new parts, ensuring they are correctly and safely installed.

Conclusion

The 3417474 captive washer cap screw by Cummins is a critical component in ensuring the secure assembly and operation of various engine components. Its role in maintaining the integrity and functionality of engine systems cannot be overstated. Regular maintenance and timely troubleshooting of this part are essential to prevent engine failures and ensure optimal performance. Understanding the importance of this Cummins part allows mechanics, engineers, and fleet operators to make informed decisions, ultimately contributing to enhanced engine reliability and reduced downtime.