3025803
Hexagon Head Cap Screw
Cummins®

The Cummins 3025803 Hexagon Head Cap Screw is a specialized fastener designed for use in commercial truck maintenance and operation. This screw plays a significant role in ensuring the secure attachment of various components within the truck’s engine and chassis systems. Its design and material composition are tailored to withstand the demanding conditions encountered in heavy-duty truck applications.

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. The screw’s design includes external threads that engage with internal threads in a mating part, creating a secure connection. Hexagon Head Cap Screws are commonly used in applications requiring high strength and resistance to loosening, making them ideal for automotive and heavy-duty truck applications ¹.

Purpose and Role in Truck Operation

The Cummins 3025803 Hexagon Head Cap Screw serves a specific purpose in commercial trucks by securing critical components within the engine and chassis systems. It is used in applications where high tensile strength and resistance to vibration are required. This screw helps maintain the integrity of connections in areas such as the engine block, transmission, and chassis frame, ensuring reliable performance and safety ².

Key Features

The Cummins 3025803 Hexagon Head Cap Screw boasts several key features that contribute to its performance and durability. These include a high-strength material composition, typically alloy steel, which provides excellent resistance to wear and corrosion. The screw features a coarse thread type, which offers a strong grip and efficient load distribution. Its hexagonal head design allows for easy and precise tightening, reducing the risk of damage to the screw or surrounding components.

Benefits

Using the Cummins 3025803 Hexagon Head Cap Screw offers several benefits in commercial truck applications. The screw’s design enhances security by providing a strong, vibration-resistant connection. Its material composition and thread type contribute to resistance against loosening, ensuring long-term reliability. Additionally, the screw’s compatibility with various truck components makes it a versatile choice for maintenance and repair tasks.

Installation Guidelines

Proper installation of the Cummins 3025803 Hexagon Head Cap Screw is crucial for ensuring secure fastening and long-term performance. Follow these step-by-step guidelines for installation:

1. Prepare the mating threads: Ensure the internal threads are clean and free of debris to facilitate proper engagement.
2. Apply thread locker (if required): In applications where additional security is needed, apply a thread locker compound to the threads.
3. Insert the screw: Carefully align the screw with the mating threads and begin threading it in by hand to avoid cross-threading.
4. Tighten the screw: Use a wrench or socket to tighten the screw to the specified torque value. Refer to the manufacturer’s recommendations for the appropriate torque setting.
5. Check for proper installation: Ensure the screw is fully seated and the connection is secure. Verify that there is no excessive play or movement.

Troubleshooting and Maintenance

Common issues associated with Hexagon Head Cap Screws include loosening due to vibration, corrosion, and wear. To troubleshoot and maintain these screws:

• Inspect regularly: Check for signs of corrosion, wear, or damage. Replace screws that show signs of deterioration.
• Tighten as needed: Periodically re-tighten screws to the specified torque value to maintain secure connections.
• Use corrosion-resistant coatings: Apply anti-corrosion coatings or thread lockers to protect against environmental factors.
• Replace damaged screws: If a screw is damaged or shows signs of excessive wear, replace it with a new one to ensure continued reliability.

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 strong reputation in the commercial truck industry for producing high-quality, reliable components. The company’s extensive product range includes engines, powertrain components, and aftermarket parts, all designed to meet the demanding requirements of heavy-duty applications.

Hexagon Head Cap Screw 3025803 in Cummins Engines

The Hexagon Head Cap Screw 3025803, manufactured by Cummins, is a critical component in several of their engine models. This part is essential for maintaining the structural integrity and operational efficiency of the engines it is used in.

ISM CM570 and QSM11 CM570

The ISM CM570 and QSM11 CM570 engines both utilize the 3025803 screw in various applications. This screw is integral in securing components that are subject to significant stress and vibration, ensuring that the engine’s internal parts remain properly aligned and fastened.

ISM11 CM876 SN and M11 CELECT

In the ISM11 CM876 SN and M11 CELECT engines, the 3025803 screw is used in several key areas. Its application in these engines highlights its importance in maintaining the precision and reliability of the engine’s mechanical components. The screw’s design allows for easy installation and removal, which is crucial during maintenance and repair operations.

M11 CELECT PLUS and M11 MECHANICAL

The M11 CELECT PLUS and M11 MECHANICAL engines also incorporate the 3025803 screw. In these engines, the screw is used to secure various parts that are critical to the engine’s performance. Its robust design ensures that it can withstand the operational conditions within these engines, contributing to the overall durability and efficiency of the machinery.

Each of these engines benefits from the use of the 3025803 screw, which is a testament to its versatility and reliability in Cummins’ engine lineup.

Role of Part 3025803 Hexagon Head Cap Screw in Engine Systems

The part 3025803 Hexagon Head Cap Screw is integral to the secure assembly and operation of various engine components. In the arrangement of engine parts, this screw ensures that components are held firmly in place, preventing misalignment and potential damage during engine operation.

Within the turbocharger system, the Hexagon Head Cap Screw is used to fasten the turbocharger to its housing, ensuring a tight seal that is essential for optimal performance and efficiency. It also plays a role in securing the gear housing cover, maintaining the integrity of the gear system and preventing oil leaks.

In the housing of various engine components, such as the thermostat, this screw is employed to keep the housing securely closed. This is vital for maintaining the correct temperature regulation within the engine, as the thermostat controls the flow of coolant.

The screw is also utilized in the support structures of the engine, where it helps to maintain the alignment and stability of components under the stress of operation. This is particularly important in the front engine area, where components are subject to significant forces and vibrations.

Overall, the part 3025803 Hexagon Head Cap Screw is a fundamental fastener in engine systems, contributing to the secure and efficient operation of multiple components.

Conclusion

The Cummins 3025803 Hexagon Head Cap Screw is a critical component in the maintenance and operation of commercial trucks. Its design, material composition, and key features make it an ideal fastener for securing critical components within the engine and chassis systems. Proper installation, regular maintenance, and timely replacement are essential to ensure the continued reliability and performance of this Cummins part.