3900229
Hexagon Head Cap Screw
Cummins®

The Cummins Hexagon Head Cap Screw, part number 3900229, is a critical component in the maintenance and assembly of commercial trucks. Cummins, a leading manufacturer in the industry, produces this screw to meet the demanding requirements of heavy-duty truck operations. This part plays a role in fastening various components within these trucks, ensuring structural integrity and reliable performance.

Basic Concepts of Hexagon Head Cap Screws

Hexagon Head Cap Screws are fasteners characterized by a hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. These screws provide a secure connection between components, distributing load and stress evenly across the fastened area. Typically, they are made from materials such as carbon steel, stainless steel, or alloy steel, often coated with zinc or other protective layers to enhance durability and resist corrosion ¹.

Purpose of the 3900229 Hexagon Head Cap Screw in Truck Operation

This Cummins part is designed to play a specific role in the assembly and maintenance of truck components. It is commonly used in applications where strong, reliable fastening is required, such as in the attachment of engine components, chassis parts, and various mechanical systems. Its design ensures that it can withstand the rigors of heavy-duty truck operation, providing a secure connection in critical areas.

Key Features

The 3900229 Hexagon Head Cap Screw features a hexagonal head that allows for easy installation and removal using standard tools. It has a specific thread pitch that ensures a strong grip and secure fastening. Cummins employs special manufacturing techniques to enhance the screw’s performance and reliability, including precision machining and quality control processes that ensure consistency and durability ².

Benefits

Using the 3900229 Hexagon Head Cap Screw offers several benefits. It provides improved fastening strength, ensuring that components remain securely attached under heavy-duty conditions. The screw’s design allows for ease of installation and removal, reducing maintenance time and effort. Additionally, its durable construction and protective coatings contribute to long-term reliability, even in challenging environments.

Installation Guidelines

Proper installation of the 3900229 Hexagon Head Cap Screw involves several steps to ensure a secure and efficient fastening. Begin by cleaning the mating surfaces to remove any debris or contaminants. Use a torque wrench to tighten the screw to the manufacturer’s specified torque settings, ensuring that it is neither overtightened nor undertightened. Employ the correct tools, such as a socket wrench, to avoid damaging the hexagonal head.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws include loosening over time due to vibration or thermal expansion, and corrosion in exposed environments. To address these issues, periodic inspections should be conducted to check for signs of wear or damage. If corrosion is detected, the screw should be replaced to prevent failure. Regular maintenance, including re-torquing fasteners and applying protective coatings, can prolong the lifespan of the screw.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its commitment to quality and innovation. Founded in 1919, Cummins has a long history of producing reliable and high-performance engine and component solutions. The company’s product range includes engines, filtration systems, and aftermarket parts, all designed to meet the rigorous demands of heavy-duty applications. Cummins’ reputation for excellence is built on its dedication to engineering excellence and customer satisfaction ³.

Hexagon Head Cap Screw 3900229 in Cummins Engines

The Cummins Hexagon Head Cap Screw part number 3900229 is a critical component in several Cummins engine models. This screw is designed to provide secure fastening in various applications within the engine assembly. Here is how it fits into different Cummins engines:

4B3.9 and 6B5.9 Engines

In the 4B3.9 and 6B5.9 engines, the 3900229 screw is used in several key areas. It secures various engine components, ensuring that parts remain tightly fastened under operational stresses. This screw is particularly important in maintaining the integrity of the engine’s structural components, contributing to the overall reliability and performance of these engines.

6C8.3 and B5.9 G Engines

The 6C8.3 and B5.9 G engines also utilize the 3900229 screw in multiple locations. Its role in these engines is similar to that in the 4B3.9 and 6B5.9 models, providing essential fastening for components that require precise alignment and secure attachment. This screw helps in maintaining the alignment and stability of various engine parts, ensuring smooth operation and longevity of the engine.

C8.3 G and G8.3 Engines

In the C8.3 G and G8.3 engines, the 3900229 screw is employed in critical fastening applications. Its use in these engines ensures that components are held firmly in place, which is vital for the engines’ operational efficiency and durability. The screw’s design allows it to withstand the high stresses and vibrations typical in engine environments, making it a reliable choice for these applications.

L10 MECHANICAL Engine

The L10 MECHANICAL engine incorporates the 3900229 screw in several key fastening roles. This screw is essential for securing various components within the engine, ensuring that parts remain tightly fastened and aligned. Its use in the L10 MECHANICAL engine contributes to the engine’s overall structural integrity and operational performance.

The consistent use of the 3900229 Hexagon Head Cap Screw across these Cummins engines highlights its importance in maintaining the reliability and performance of the engine assemblies.

Role of Part 3900229 Hexagon Head Cap Screw in Engine Systems

The Part 3900229 Hexagon Head Cap Screw is integral to the assembly and functionality of various engine components. Its robust design ensures secure fastening, which is essential for the reliable operation of the engine system.

Alternator Location and Connection

In the alternator setup, the Hexagon Head Cap Screw is used to firmly attach the alternator to its mounting bracket. This secure connection is vital for maintaining the alternator’s alignment and ensuring efficient power generation. Additionally, it helps in stabilizing the electrical connections, reducing the risk of vibrations that could lead to intermittent power supply.

Water Inlet and Plumbing

For the water inlet and plumbing components, the Hexagon Head Cap Screw plays a role in securing the water inlet housing to the engine block. This ensures a leak-free connection, which is essential for maintaining proper coolant flow and engine temperature regulation. It also aids in securing various plumbing fittings, ensuring that the coolant system remains intact under operating pressures.

Drive and Fan Assembly

In the drive and fan assembly, the Hexagon Head Cap Screw is employed to attach the fan to the drive mechanism. This secure attachment is necessary for the fan to operate efficiently, providing adequate airflow for engine cooling. It also ensures that the fan remains aligned with the engine components, preventing undue stress on the drive belt and other related parts.

Engine Brake and Exhaust Brake

For engine brake and exhaust brake systems, the Hexagon Head Cap Screw is used to fasten components that engage and disengage the braking mechanisms. This secure fastening is important for the precise operation of these systems, ensuring that they function correctly under various driving conditions. It also helps in maintaining the structural integrity of the brake assembly.

Engine Mounting

In engine mounting applications, the Hexagon Head Cap Screw is utilized to attach the engine to its mounting brackets. This secure connection is essential for absorbing engine vibrations and ensuring that the engine remains stable within the vehicle’s frame. It also plays a role in maintaining the alignment of the engine with other drivetrain components.

Oil Pan Attachment

The oil pan, which houses the engine’s lubricant, relies on the Hexagon Head Cap Screw for secure attachment to the engine block. This ensures that the oil pan remains firmly in place, preventing oil leaks and maintaining the integrity of the lubrication system. It also aids in stabilizing the oil pan during engine operation, reducing the risk of damage from vibrations.

Compressor Coolant System

In the compressor coolant system, the Hexagon Head Cap Screw is used to secure various components, including coolant passages and fittings. This ensures a reliable coolant flow, which is essential for maintaining the compressor’s temperature and efficiency. It also helps in preventing coolant leaks, which could lead to system failure.

Overall, the Part 3900229 Hexagon Head Cap Screw is a versatile fastener that contributes to the secure and efficient operation of multiple engine components. Its reliable performance under various conditions makes it an indispensable part in engine system assemblies.

Conclusion

The Cummins Hexagon Head Cap Screw, part number 3900229, is a vital component in the maintenance and assembly of commercial trucks. Its robust design, ease of installation, and reliable performance make it an essential part in various engine systems. Proper installation and maintenance of this screw ensure the structural integrity and reliable operation of heavy-duty truck engines.