4944670
Engine Connecting Rod
Cummins®

Introduction

The Cummins 4944670 Engine Connecting Rod is a vital component in the engine systems of heavy-duty trucks. Its purpose is to facilitate the transfer of motion from the piston to the crankshaft, thereby contributing to the engine’s overall operation and efficiency. This component is engineered to withstand the rigorous demands of heavy-duty applications, ensuring reliable performance under various operating conditions ¹.

Basic Concepts of Engine Connecting Rods

An engine connecting rod, often referred to simply as a “con rod,” is a fundamental element in the internal combustion engine. Its primary function is to convert the linear motion of the piston into rotational motion of the crankshaft. This conversion is essential to the engine’s operation, as it allows the energy produced by the combustion of fuel to be harnessed and used to power the vehicle ². The connecting rod operates under significant stress and must be designed to endure high loads and temperatures without failure.

Role of the 4944670 Engine Connecting Rod in Truck Operation

The Cummins 4944670 Engine Connecting Rod plays a specific role in the operation of a truck engine by efficiently transferring motion between the piston and the crankshaft. This transfer is achieved through the rod’s design, which includes a small end that attaches to the piston via a piston pin and a large end that connects to the crankshaft. The smooth and precise operation of this component is vital for the engine’s performance, ensuring that the energy from each combustion cycle is effectively translated into mechanical work ³.

Key Features

The Cummins 4944670 Engine Connecting Rod is characterized by several key features that enhance its performance and durability. These include a robust material composition, typically involving high-strength alloys, which provide the necessary strength and resistance to fatigue. The design elements of the rod, such as its precise machining and balanced weight distribution, contribute to its ability to operate smoothly under high stress. Additionally, any unique characteristics, such as specialized coatings or treatments, further enhance its performance and longevity.

Benefits

The Cummins 4944670 Engine Connecting Rod offers several benefits that contribute to improved engine efficiency and overall performance. Its durable construction allows it to withstand the high stresses and temperatures encountered in heavy-duty truck engines, ensuring reliable operation over time. The precise design and manufacturing processes result in a component that operates with minimal friction and wear, enhancing engine efficiency. Furthermore, the rod’s contribution to smooth and efficient power transmission plays a role in the engine’s overall performance and longevity.

Troubleshooting and Maintenance

Common issues associated with engine connecting rods can include wear, fatigue, and failure due to excessive stress or inadequate lubrication. Troubleshooting these problems involves a thorough inspection of the rod for signs of damage or wear, as well as checking the lubrication system to ensure proper oil flow. Maintenance practices to ensure the longevity and reliable operation of the 4944670 Engine Connecting Rod include regular inspections, proper lubrication, and timely replacement of worn or damaged components. Adhering to manufacturer-recommended maintenance schedules and procedures is crucial for preventing issues and ensuring optimal performance.

Compatibility with Cummins Engines

The Cummins Engine Connecting Rod part number 4944670 is designed to fit a variety of Cummins engines, ensuring smooth and reliable operation across multiple engine models. This part provides a robust connection between the piston and crankshaft.

ISL Series Engines

The 4944670 connecting rod is compatible with several models within the ISL series, including:

• ISL CM2150
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

QSL Series Engines

This connecting rod also fits various QSL series engines, such as:

• QSC9 CM2250/QSL9 CM2250
• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM850 (CM2850)
• QSL9 G CM558
• QSL9.3 CM2880 L113

L Series Engines

Additionally, the part is designed to fit the following L series engines:

• L GAS PLUS CM556
• L8.9
• L8.9 L121
• L8.9G CMOH2.0 L125B
• L9.3 L105
• L9.5 L117

This comprehensive compatibility ensures that the Cummins Engine Connecting Rod part number 4944670 can be used across a wide range of engine models, providing a reliable solution for maintenance and repair needs.

Conclusion

The Cummins 4944670 Engine Connecting Rod is a critical component in the efficient operation of heavy-duty truck engines. Its role in converting piston motion into crankshaft rotation is fundamental to the engine’s performance. With its robust design, durable construction, and precise engineering, this Cummins part ensures reliable and efficient engine operation, contributing to the overall performance and longevity of the engine.