3420847
Socket Head Cap Screw
Cummins®

Introduction

The Socket Head Cap Screw, specifically Part #3420847 by Cummins, is a vital component in the maintenance and operation of commercial trucks. Cummins Inc., a renowned manufacturer in the commercial truck industry, produces this screw, which is integral to ensuring the reliability and efficiency of truck components. This overview will delve into the specifics of the Socket Head Cap Screw, its design, functionality, and the role it plays in truck maintenance.

Basic Concepts of Socket Head Cap Screws

A Socket Head Cap Screw is a type of fastener characterized by a hexagonal socket in the head, allowing it to be driven by a hex key. This design facilitates easy installation and removal without the need for a traditional screwdriver. The screw is commonly used in applications requiring a high degree of precision and strength, making it suitable for various industrial and automotive uses ¹.

Purpose of the 3420847 Socket Head Cap Screw in Truck Operation

The 3420847 Socket Head Cap Screw by Cummins is designed to secure components within commercial trucks. It plays a role in maintaining the integrity of truck assemblies by providing a strong, reliable fastening solution. This screw is often used in areas where vibration and stress are common, ensuring that parts remain securely fastened during operation ².

Key Features

The 3420847 Socket Head Cap Screw boasts several key features that enhance its performance and durability. It is constructed from high-quality materials, ensuring resistance to corrosion and wear. The screw features a fine thread, which allows for precise adjustments and a secure fit. Its head design includes a hexagonal socket, enabling easy installation and removal with a hex key.

Benefits

Utilizing the 3420847 Socket Head Cap Screw offers several advantages. Its durable construction ensures long-lasting performance, even in demanding environments. The ease of installation and removal provided by the hexagonal socket design saves time during maintenance procedures. Additionally, the screw’s design resists loosening over time, maintaining a secure connection between components ³.

Installation Guidelines

To ensure optimal performance and safety, follow these guidelines when installing the 3420847 Socket Head Cap Screw:

1. Select the appropriate size hex key for the screw.
2. Align the screw with the designated hole in the component.
3. Insert the hex key into the socket and turn clockwise to install the screw.
4. Tighten the screw to the recommended torque specification to ensure a secure fit without over-tightening.

Troubleshooting and Maintenance

Common issues with Socket Head Cap Screws include loosening over time and corrosion. To troubleshoot and maintain these screws:

• Regularly inspect screws for signs of wear or corrosion.
• Re-tighten screws as necessary to maintain a secure connection.
• Replace screws that show significant wear or damage to prevent failure.

Safety Considerations

When installing and maintaining Socket Head Cap Screws, adhere to the following safety practices:

• Use the correct tools to avoid damaging the screw or the component.
• Follow torque specifications to prevent over-tightening, which can lead to component damage.
• Wear appropriate personal protective equipment (PPE) to safeguard against injuries during installation and maintenance.

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 is committed to quality, innovation, and customer satisfaction. The company’s extensive product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of the commercial truck industry.

Socket Head Cap Screw 3420847 in Cummins Engines

The Socket Head Cap Screw 3420847, manufactured by Cummins, is a critical component in various Cummins engines. This part is designed to provide secure fastening in applications where a flush, smooth surface is required. It is commonly used in the assembly of engine components, ensuring that parts remain tightly secured under operational stresses.

Application in Specific Cummins Engines

QSV81G and QSV91G Engines

In the QSV81G and QSV91G engines, the Socket Head Cap Screw 3420847 is utilized in several key areas. These include securing the cylinder heads to the engine block, ensuring that the combustion chambers are sealed properly. The screw’s design allows for precise torque application, which is essential for maintaining the integrity of the engine’s sealing surfaces.

QSW/QSV82 Engines

For the QSW/QSV82 engines, this screw is integral in the assembly of various engine components. It is often used in the attachment of the engine’s intake and exhaust manifolds, as well as in the mounting of ancillary parts such as the alternator and air conditioning compressor. The consistent quality of the 3420847 screw ensures reliable performance and longevity in these critical applications.

QSW27 and QSW36 Engines

In the QSW27 and QSW36 engines, the Socket Head Cap Screw 3420847 plays a vital role in the assembly of the engine’s internal components. It is used to fasten parts such as the engine’s oil pan, timing cover, and various brackets. The screw’s ability to withstand high temperatures and pressures makes it an ideal choice for these demanding environments.

QSW73 Engine

The QSW73 engine also benefits from the use of the Socket Head Cap Screw 3420847. This screw is employed in securing the engine’s front cover, which houses essential components such as the water pump and crankshaft pulley. The screw’s design ensures that these components remain securely fastened, preventing any potential leaks or failures.

Role of Part 3420847 Socket Head Cap Screw in Engine Systems

The part 3420847 Socket Head Cap Screw is integral to the secure assembly and operation of various engine components. It is employed in the air outlet assembly pipe to ensure a tight seal, preventing air leaks that could affect engine performance. In the arrangement of the oil fill system, this screw helps maintain the structural integrity of the assembly plug, ensuring consistent oil levels for lubrication.

Within the camshaft drive side A, the Socket Head Cap Screw secures components, allowing for precise timing and operation of the camshaft. The cleaner air control assembly cover relies on this screw to maintain a sealed environment, enhancing the efficiency of air filtration. Similarly, the cover of the fuel pump is fastened securely, ensuring the pump operates under the correct pressure conditions.

The drive components of the engine barring and engine assembly cover utilize this screw to maintain alignment and structural stability. In the engine barring assembly drive, it ensures that all moving parts are correctly positioned and operate smoothly. The filter assembly shell depends on this screw to keep the filter elements in place, ensuring effective filtration of contaminants.

For the fuel injector assembly cover and fuel injector pump assembly cover, the Socket Head Cap Screw plays a role in maintaining the seal and structural integrity, which is vital for the precise delivery of fuel. The fuel pump assembly cover also benefits from this screw, ensuring that the pump components remain securely in place.

In the housing of the flywheel, this screw helps in securing the flywheel to the engine, ensuring smooth power transmission. The injector pump side A V16 cover and various pump side A and B V18 injector covers rely on this screw to maintain a secure seal, preventing fuel leaks and ensuring efficient fuel delivery.

The plumbing turbocharger assembly and turbocharger plumbing use this screw to secure connections, ensuring there are no leaks in the high-pressure air system. The protective cover of various engine components is also fastened using this screw, providing necessary protection against environmental factors.

Lastly, in the sensor assembly housing and water pump, the Socket Head Cap Screw ensures that these components are securely mounted, maintaining their functionality and preventing any potential leaks or misalignments.

Conclusion

The 3420847 Socket Head Cap Screw by Cummins is a critical component in the maintenance and operation of commercial trucks and various Cummins engines. Its design, durability, and ease of use make it an essential part for securing engine components, ensuring the reliability and efficiency of truck and engine systems.