3253888
Hexagon Head Cap Screw
Cummins®

The Cummins 3253888 Hexagon Head Cap Screw is a specialized fastener designed for use in heavy-duty truck components. Its purpose is to provide secure and reliable fastening in various mechanical assemblies within the truck. This screw is significant due to its robust construction and precise engineering, which contribute to the overall durability and performance of heavy-duty trucks ⁴.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. These screws are commonly used in mechanical assemblies to secure components together. They function by creating a strong, threaded connection that can withstand significant stress and vibration, ensuring that parts remain firmly attached during operation ³.

Purpose and Role in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of heavy-duty trucks. It is utilized in areas where secure fastening is required to maintain the integrity of the truck’s structure and components. Common application areas include engine mounts, chassis components, and various mechanical assemblies where vibration and stress are prevalent ¹.

Key Features

The 3253888 features several key attributes that enhance its functionality. It is typically made from high-strength materials such as alloy steel, which provides durability and resistance to wear. The screw has a coarse or fine thread, depending on the application, allowing it to create a strong and secure connection. Unique design elements may include a chamfered end for easy insertion and a corrosion-resistant coating to extend its service life ².

Benefits

Using this part offers several benefits. Its high-strength material composition ensures durability under demanding conditions. The screw’s design provides resistance to vibration, which is crucial in heavy-duty truck applications where components are subject to constant movement and stress. Additionally, the hexagonal head allows for easy installation and removal, facilitating maintenance procedures ³.

Installation and Usage Guidelines

Proper installation of the 3253888 involves several steps to ensure a secure fit. Begin by cleaning the mating surfaces to remove any debris or corrosion. Insert the screw into the pre-drilled hole and use a wrench or socket to tighten it to the specified torque. It is important to follow torque specifications provided by the manufacturer to avoid over-tightening, which can damage threads, or under-tightening, which can lead to loose connections ³.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening due to vibration, corrosion, and wear. To troubleshoot these issues, regularly inspect screws for signs of corrosion or damage. If a screw appears loose, re-tighten it to the specified torque. In cases of significant corrosion or damage, replacement may be necessary to ensure reliable performance. Maintenance practices such as applying a thread locker can help prevent loosening and extend the screw’s service life ³.

Safety Considerations

When handling, installing, and maintaining the 3253888, several safety guidelines should be followed. Wear appropriate personal protective equipment, such as gloves and safety glasses, to protect against injury. Ensure that the work area is clean and free of obstacles to prevent accidents. Follow proper lifting techniques when handling heavy components to avoid strain or injury. Additionally, use the correct tools and follow torque specifications to prevent damage to the screw or surrounding components ³.

Cummins 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 and innovation in the automotive industry. The company’s product range includes a variety of components and systems designed to enhance the performance and reliability of heavy-duty trucks and other vehicles ⁴.

Hexagon Head Cap Screw 3253888 Compatibility with Cummins Engines

The Cummins part number 3253888, a Hexagon Head Cap Screw, is designed to fit a variety of Cummins engines. This screw is integral in securing various components within the engine assembly, ensuring structural integrity and proper function. Below is a detailed breakdown of the engines with which this screw is compatible:

B Series Engines

• B5.9 GAS PLUS CM556
• B6.7 CM2670 B153B

G Series Engines

• G5.9
• G8.3

ISB/ISD Series Engines

• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN

ISBE Series Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

ISX Series Engines

• ISX CM570

QSB Series Engines

• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

This screw is meticulously engineered to meet the stringent requirements of Cummins engines, ensuring it can withstand the operational stresses and environmental conditions these engines encounter. Its use across such a diverse range of engine models underscores its versatility and critical role in maintaining engine assembly integrity ⁴.

Role of Part 3253888 Hexagon Head Cap Screw in Various Engine Systems

The part 3253888 Hexagon Head Cap Screw is instrumental in ensuring the secure assembly and reliable operation of multiple components within engine systems. Its application spans across various critical areas, contributing to the overall efficiency and safety of the engine.

Alternator

In the alternator system, the Hexagon Head Cap Screw is used to fasten the alternator to the engine block. This secure attachment is essential for maintaining the structural integrity of the alternator, ensuring it can withstand the vibrations and stresses encountered during engine operation. Proper fastening also ensures efficient power transfer from the engine to the alternator, which is vital for charging the battery and powering the vehicle’s electrical systems ⁴.

Brake System

Within the brake system, the Hexagon Head Cap Screw plays a role in securing brake components such as calipers and brackets. Ensuring these parts are firmly attached is important for the consistent and reliable performance of the braking system. This secure attachment helps maintain the alignment and functionality of brake components, contributing to the vehicle’s overall safety ⁴.

Engine and Crankcase

The screw is commonly used in the engine and crankcase assembly to fasten various covers and plates. This includes securing the valve cover, which protects the valve train components, and the oil pan, which houses the engine’s lubricant. Proper fastening prevents leaks and ensures that the engine components remain protected from contaminants ⁴.

Instrument and Engine Control Modules

In the instrument and engine control modules, the Hexagon Head Cap Screw is utilized to mount these sensitive electronic components securely. This ensures that the modules remain stable and are not affected by vibrations, which could lead to malfunctions. Stable mounting is essential for accurate readings and reliable engine management ⁴.

Turbocharger

For turbocharged engines, the screw is employed to secure the turbocharger to the engine block and exhaust system. This attachment is vital for maintaining the turbocharger’s position and ensuring it operates within specified parameters. Proper fastening helps prevent turbocharger failure and ensures optimal performance ⁴.

Fuel Control System

In the fuel control system, the Hexagon Head Cap Screw is used to secure fuel injectors and related components. This ensures that the fuel delivery system remains intact and functions correctly, which is essential for maintaining the engine’s performance and fuel efficiency ⁴.

Engine Monitoring System

The screw also finds its application in the engine monitoring system, where it is used to attach sensors and monitoring devices to the engine block. Secure attachment of these components ensures accurate data collection and reliable engine performance monitoring, which is essential for diagnostics and maintenance ⁴.

Conclusion

The Cummins 3253888 Hexagon Head Cap Screw is a critical component in the assembly and maintenance of heavy-duty truck engines. Its robust design, high-strength material, and precise engineering make it suitable for withstanding the demanding conditions of heavy-duty applications. Proper installation, regular maintenance, and adherence to safety guidelines are essential for ensuring the reliable performance and longevity of this part in various engine systems.