3903094
Hexagon Head Cap Screw
Cummins®

The Cummins part number 3903094, a Hexagon Head Cap Screw, is a specialized fastener designed for commercial truck maintenance and operation. Cummins, a renowned name in the commercial truck industry, manufactures this screw to meet the demanding requirements of heavy-duty applications. This part is integral to ensuring the secure assembly of various truck components, contributing to the overall reliability and performance of commercial vehicles.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is 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, ensuring a strong and stable connection suitable for applications requiring durability and resistance to vibration ¹.

Purpose of the 3903094 Hexagon Head Cap Screw in Truck Operation

This Cummins part plays a specific role in the operation and maintenance of commercial trucks. It is utilized in various truck systems, including the engine, transmission, and chassis, to secure critical components. Its application ensures that parts remain firmly in place, even under strenuous conditions encountered in commercial trucking, such as heavy loads and rough terrains.

Key Features

The 3903094 Hexagon Head Cap Screw boasts several key features that enhance its performance and durability in truck applications. Its design includes a hexagonal head for easy installation and removal, a threaded shaft for secure fastening, and a flat underside to distribute load evenly. The screw is typically made from high-strength materials, such as alloy steel, to withstand the rigors of commercial truck use. Additionally, it may feature coatings or treatments to improve resistance to wear and corrosion ².

Benefits

Using the 3903094 Hexagon Head Cap Screw offers several benefits. Its high-strength material composition ensures improved reliability under heavy-duty conditions. The screw’s design allows for ease of installation, reducing downtime during maintenance procedures. Furthermore, its resistance to wear and corrosion prolongs its service life, making it a cost-effective solution for commercial truck operators.

Installation and Usage

Proper installation of the 3903094 Hexagon Head Cap Screw is vital to ensure a secure and lasting connection. It is recommended to follow torque specifications provided by the manufacturer to achieve the correct tension without overtightening, which could damage the screw or the components being fastened. Using the appropriate tools, such as a torque wrench, can help achieve the desired torque settings. Additionally, ensuring that mating surfaces are clean and free of debris prior to installation can enhance the screw’s performance.

Troubleshooting and Maintenance

Common issues with the 3903094 Hexagon Head Cap Screw, such as loosening or corrosion, can often be addressed through regular inspection and maintenance. If a screw appears loose, it should be re-tightened to the manufacturer’s specified torque. In cases of corrosion, cleaning the affected area and applying a corrosion-resistant coating can help prolong the screw’s service life. Regular maintenance checks can identify potential issues early, allowing for timely interventions.

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 has established a reputation for quality and reliability in the commercial truck industry. The company’s extensive product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding needs of commercial vehicle operators. The 3903094 Hexagon Head Cap Screw is a testament to Cummins’ commitment to providing high-quality, durable components for the commercial trucking sector.

Compatibility with Cummins Engines

The Cummins part number 3903094, a Hexagon Head Cap Screw, is designed to be compatible with a variety of Cummins engines. This screw is integral in securing various components within the engine assembly, ensuring structural integrity and operational efficiency. Here is a breakdown of the engines with which this part is compatible:

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines, both part of Cummins’ range of diesel engines, utilize the Hexagon Head Cap Screw 3903094 for fastening certain parts. These engines are known for their robust performance and reliability, often used in heavy-duty applications.

B3.9 G and B5.9 G Engines

The B3.9 G and B5.9 G engines also incorporate the Hexagon Head Cap Screw 3903094. These engines are designed for applications requiring a balance of power and efficiency, making them suitable for various industrial uses.

B5.9 GAS PLUS CM556 Engine

The B5.9 GAS PLUS CM556 engine is another model that benefits from the use of the Hexagon Head Cap Screw 3903094. This engine is engineered for high performance and is often used in demanding environments.

G5.9 and G5.9 CM558 Engines

The G5.9 and G5.9 CM558 engines are equipped with the Hexagon Head Cap Screw 3903094. These engines are known for their durability and are widely used in various sectors, including agriculture and construction.

ISB5.9G CM2180 and ISM CM570 Engines

The ISB5.9G CM2180 and ISM CM570 engines both use the Hexagon Head Cap Screw 3903094. These engines are part of Cummins’ lineup of high-performance diesel engines, designed for heavy-duty applications.

ISM CM570/870 and ISM CM876 Engines

The ISM CM570/870 and ISM CM876 engines also incorporate the Hexagon Head Cap Screw 3903094. These engines are known for their reliability and efficiency, making them suitable for a wide range of industrial applications.

QSM11 CM570 Engine

The QSM11 CM570 engine is another model that utilizes the Hexagon Head Cap Screw 3903094. This engine is designed for high-performance applications and is often used in demanding environments.

By ensuring that the Hexagon Head Cap Screw 3903094 is used in these engines, Cummins maintains the structural integrity and operational efficiency of its engine components.

Role of Part 3903094 Hexagon Head Cap Screw in Engine Systems

The part 3903094 Hexagon Head Cap Screw is instrumental in securing and maintaining the integrity of various components within engine systems. Its application spans across multiple assemblies, ensuring that parts remain firmly in place under operational stresses.

Alternator Location and Drive

In the alternator location, the Hexagon Head Cap Screw is used to fasten the alternator to its mounting bracket. This secure attachment is vital for maintaining the alternator’s alignment with the drive belt, ensuring efficient power transfer from the engine to the alternator. Additionally, it plays a role in the alternator drive mechanism by securing the pulley to the alternator shaft, which is essential for consistent rotational speed and reliable electrical output.

Alternator Mounting

For the alternator mounting, the screw ensures that the alternator is held steadfast against vibrations and movement. This stability is necessary for the alternator to function correctly, converting mechanical energy into electrical energy without interruption.

Air Compressor Mounting

When it comes to the air compressor mounting, the Hexagon Head Cap Screw is employed to attach the compressor to its designated location on the engine. This secure fit is important for the compressor’s operation, as it must withstand the pressures and forces generated during the compression of air.

Starting Motor

In the starting motor assembly, the screw is used to attach the motor to the engine block or transmission housing. This secure connection is necessary for the starting motor to deliver the torque required to crank the engine, initiating the combustion process.

Spacer

The use of spacers in engine systems often involves the Hexagon Head Cap Screw to maintain the correct distance between components. Whether it’s between the alternator and its bracket or within the starting motor assembly, the screw ensures that spacers are held in place, preserving the designed clearances and tolerances.

Fan Pilot

Lastly, in the fan pilot system, the screw is utilized to secure the fan pilot to the engine. This attachment is significant for the proper functioning of the cooling fan, ensuring it operates at the correct speed and alignment to provide adequate engine cooling.

Conclusion

The Cummins part number 3903094, a Hexagon Head Cap Screw, plays a crucial role in the maintenance and operation of commercial trucks. Its design and features ensure secure assembly of various truck components, contributing to the overall reliability and performance of commercial vehicles. Proper installation, regular maintenance, and understanding its role in engine systems are essential for maximizing the benefits of this part in heavy-duty applications.