3349806
Connecting Rod Cap Screw
Cummins®

The Cummins 3349806 Connecting Rod Cap Screw is a specialized component designed for use in heavy-duty truck engines. Its purpose is to secure the connecting rod cap to the connecting rod, ensuring the integrity of the engine’s crankshaft assembly. This screw plays a significant role in maintaining the structural stability and operational efficiency of the engine ³.

Basic Concepts of Connecting Rod Cap Screws

Connecting rod cap screws are fasteners used to attach the connecting rod cap to the connecting rod in an internal combustion engine. Their function is to hold the two halves of the connecting rod together, allowing the rod to pivot smoothly on the crankshaft journal. This secure attachment is vital for the engine’s operation, as it ensures the proper transmission of force from the piston to the crankshaft, facilitating the conversion of linear motion into rotational motion ¹.

Role of the 3349806 Connecting Rod Cap Screw in Truck Engines

The 3349806 Connecting Rod Cap Screw is specifically engineered to meet the demanding requirements of heavy-duty truck engines. It plays a role in maintaining the alignment and stability of the connecting rod as it moves in synchronization with the crankshaft. This screw interacts with other engine components, such as the crankshaft bearings and piston assembly, contributing to the smooth and efficient operation of the engine ².

Key Features of the 3349806 Connecting Rod Cap Screw

The 3349806 Connecting Rod Cap Screw is characterized by several key features that enhance its performance. These include a robust material composition designed to withstand high stress and temperature, precise design specifications to ensure a secure fit, and unique characteristics such as threading and head design that facilitate easy installation and removal. These features collectively contribute to the screw’s reliability and durability in heavy-duty applications ³.

Benefits of Using the 3349806 Connecting Rod Cap Screw

Utilizing the 3349806 Connecting Rod Cap Screw offers several benefits. These include improved engine reliability due to its secure attachment mechanism, enhanced durability thanks to its high-quality material and design, and optimized performance as a result of its precise engineering. These advantages contribute to the overall efficiency and longevity of the engine ¹.

Installation and Maintenance

Proper installation of the 3349806 Connecting Rod Cap Screw involves adhering to specific torque specifications and recommended procedures to ensure a secure and stable connection. Maintenance tips to ensure longevity and optimal performance include regular inspection for signs of wear or damage, proper lubrication, and timely replacement if necessary. Following these guidelines helps maintain the integrity of the engine’s crankshaft assembly ².

Troubleshooting Common Issues

Common issues that may arise with connecting rod cap screws include loosening or failure. Troubleshooting steps to address these problems effectively involve inspecting the screw and surrounding components for damage, ensuring proper torque during installation, and replacing the screw if it shows signs of wear or failure. Addressing these issues promptly helps maintain the engine’s performance and reliability ³.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history of innovation and quality, Cummins has established a strong reputation in the automotive industry, particularly in the realm of heavy-duty truck engines. The company’s commitment to excellence and customer satisfaction is reflected in its wide range of products and services designed to meet the needs of various industries ¹.

Connecting Rod Cap Screw (Part 3349806) Compatibility with Cummins Engines

The Connecting Rod Cap Screw, identified by part number 3349806, is a critical component in ensuring the stability and functionality of the connecting rod assembly in various Cummins engines. This screw is designed to securely fasten the connecting rod cap to the connecting rod, maintaining the integrity of the engine’s movement and power transmission ².

G855 Series Engines

• G855
• G855 CM558
• GTA855 CM558 (CM2358)
• G101

The G855 series engines, including the G855, G855 CM558, GTA855 CM558 (CM2358), and G101, are equipped with the 3349806 Connecting Rod Cap Screw. This screw is essential for the proper assembly and operation of the connecting rod, ensuring that the rod remains securely attached to the crankshaft and functions without excessive movement or wear ³.

N14 Series Engines

• N14 CELECT
• N14 CELECT PLUS
• N14 G
• N14 MECHANICAL

The N14 series engines, such as the N14 CELECT, N14 CELECT PLUS, N14 G, and N14 MECHANICAL, also utilize the 3349806 Connecting Rod Cap Screw. This screw is integral to the N14 engines’ design, providing the necessary fastening for the connecting rod cap and ensuring the engine’s smooth operation ¹.

NH/NT 855 Engines

• NH/NT 855

The NH/NT 855 engine incorporates the 3349806 Connecting Rod Cap Screw as part of its assembly. This screw is vital for maintaining the structural integrity of the connecting rod, which is crucial for the engine’s performance and longevity ².

QSN14 Series Engines

• QSN14 CM876 N103
• QSNT14 CM876 N102

The QSN14 series engines, including the QSN14 CM876 N103 and QSNT14 CM876 N102, also rely on the 3349806 Connecting Rod Cap Screw. This screw is essential for the secure attachment of the connecting rod cap, ensuring that the engine operates efficiently and reliably ³.

Role of Part 3349806 Connecting Rod Cap Screw in Engine Systems

In the intricate assembly of an engine, the Part 3349806 Connecting Rod Cap Screw serves a fundamental role in ensuring the structural integrity and operational efficiency of several key components. This screw is instrumental in securing the connecting rod cap to the connecting rod, which in turn connects the piston to the crankshaft ¹.

When examining the Block, Cyl Short NTC-300, NTC-350, and NTC-400, the connecting rod cap screw ensures that the connecting rod remains firmly attached, allowing for smooth and consistent transmission of force from the piston’s reciprocating motion to the crankshaft’s rotational motion. This secure attachment is vital for the engine’s balanced operation and durability ².

In the context of the Camshaft and Gear system, the stability provided by the connecting rod cap screw indirectly supports the precise timing and operation of the valvetrain. A securely fastened connecting rod ensures that the crankshaft’s rotation is uniform, which is essential for the camshaft’s accurate actuation of the valves ³.

For the Crankshaft, the connecting rod cap screw’s role is to maintain the integrity of the connecting rod’s attachment. This is important for the crankshaft to receive consistent force inputs from the pistons, enabling it to convert linear motion into rotational motion effectively ¹.

In the Cylinder Short Block, which encompasses the lower part of the engine including the crankshaft, pistons, and connecting rods, the connecting rod cap screw is a small yet significant component that ensures all moving parts work in harmony ².

The Engine Connecting Rod and Engine Piston rely on the connecting rod cap screw to maintain their structural relationship. This screw ensures that the piston’s motion is efficiently transferred to the crankshaft without any loss of force or misalignment ³.

Additionally, in high-performance engines denoted by EBM: Performance Parts and Performance Parts NT-855, the connecting rod cap screw’s precision and reliability are even more pronounced. These engines demand components that can withstand higher stresses and deliver peak performance, making the role of the connecting rod cap screw even more significant ¹.

Lastly, in systems involving Injector Plumbing and Fuel Connection, the engine’s overall efficiency and performance are enhanced by the smooth and consistent operation of the crankshaft, which is directly influenced by the secure attachment of the connecting rod via the connecting rod cap screw ².

Conclusion

In summary, the Part 3349806 Connecting Rod Cap Screw is a pivotal element in the engine’s architecture, ensuring that the connection between the piston and crankshaft is robust and reliable, thereby contributing to the engine’s overall performance and longevity ³.