3990112
Control Rod Pivot Pin
Cummins®

The Control Rod Pivot Pin (Part #3990112) by Cummins is a component designed for use in heavy-duty trucks. It is integral to the operation of the engine system, facilitating the connection and movement between various components. Manufactured by Cummins, a well-established name in the automotive industry, this pivot pin is engineered to meet the demanding requirements of commercial vehicle applications ¹.

Function and Operation

The Control Rod Pivot Pin operates within the truck’s engine system by connecting the control rod to the fuel injection pump. It allows for the precise movement necessary for the control rod to adjust the fuel injection timing. This movement is crucial for the efficient operation of the engine, ensuring that fuel is injected at the optimal time for combustion. The pivot pin’s design enables smooth and reliable operation under the high stresses and temperatures encountered in heavy-duty truck engines ².

Key Features

This Cummins part is characterized by its robust design and high-quality materials. It is crafted from durable materials that offer resistance to wear and corrosion, ensuring longevity in harsh operating environments. Precision engineering is a hallmark of this component, allowing for accurate and consistent performance. The pin’s design also incorporates features that reduce friction and wear, contributing to its durability and reliability ³.

Benefits

The use of the Control Rod Pivot Pin in heavy-duty trucks offers several advantages. It contributes to improved engine performance by ensuring precise fuel injection timing. This precision leads to more efficient combustion, which can enhance the overall efficiency of the vehicle. Additionally, the pivot pin’s durability and resistance to wear contribute to the reliability of the engine system, reducing the likelihood of unexpected failures and the need for frequent maintenance ⁴.

Installation and Maintenance

Proper installation of the Control Rod Pivot Pin is vital for its performance and longevity. It should be installed according to the manufacturer’s guidelines to ensure it is securely in place and operates as intended. Regular maintenance is recommended to inspect the pivot pin for signs of wear or damage. This includes checking for proper alignment, lubrication, and any indications of corrosion or excessive wear that may affect its function.

Troubleshooting Common Issues

Common issues associated with the Control Rod Pivot Pin may include misalignment or excessive wear. Misalignment can lead to improper fuel injection timing, affecting engine performance. Excessive wear may result in increased friction and potential failure of the component. Troubleshooting these issues involves inspecting the pivot pin and its surrounding components for signs of damage or wear. Solutions may include realignment, lubrication, or replacement of the pivot pin if necessary.

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 manufacturing high-quality components for commercial vehicles. The company is committed to innovation, quality, and customer satisfaction, making it a trusted name in the automotive industry. Cummins’ products are designed to meet the rigorous demands of heavy-duty applications, ensuring reliability and performance in a variety of operating conditions.

Cummins Control Rod Pivot Pin 3990112 in Engine Applications

The Cummins Control Rod Pivot Pin, part number 3990112, is a critical component in the engine’s operation, ensuring smooth and reliable performance. This part is integral to the engine’s mechanical integrity, particularly in the following engines:

6B5.9 Engine

In the 6B5.9 engine, the Control Rod Pivot Pin 3990112 plays a pivotal role in the engine’s internal mechanisms. This engine is known for its robust design and efficiency, and the pivot pin is essential for the proper functioning of the control rods. The pin connects the control rod to the crankshaft, allowing for the necessary pivoting action that is crucial during the engine’s operation. This ensures that the pistons move in a controlled manner, contributing to the engine’s overall performance and longevity.

Grouping of Engines

The Cummins Control Rod Pivot Pin 3990112 is designed to fit seamlessly into various Cummins engines, ensuring compatibility and reliability across different engine models. This part is engineered to meet the stringent standards required for high-performance engines, providing a reliable connection point that can withstand the stresses of continuous operation. The design and material of the pin are optimized to ensure durability and resistance to wear, making it a vital component in maintaining engine efficiency and reliability.

Role of Part 3990112 Control Rod Pivot Pin in Engine Systems

The Control Rod Pivot Pin (part 3990112) is an integral component in the orchestration of various engine systems, facilitating smooth and precise operations of several interconnected parts.

In the context of the Bell Crank Lever system, the Control Rod Pivot Pin ensures the lever can pivot smoothly, translating linear motion into rotational motion efficiently. This is essential for the accurate modulation of engine functions based on driver inputs.

When integrated with the Lever and Throttle assembly, the pin allows for the precise adjustment of throttle position. It acts as a fulcrum, enabling the lever to apply the necessary force to the throttle mechanism without binding or excessive friction.

The interaction between the Male Ball Stud and the Control Rod Pivot Pin is designed to provide a robust connection point. This connection is vital for transmitting force from the control rod to the throttle system, ensuring that the throttle responds accurately to the driver’s commands.

In the Throttle Control Bracket, the pin serves as a pivotal point that allows the bracket to rotate, adjusting the throttle opening as required. This setup is fundamental for maintaining the correct air-fuel mixture in the engine, optimizing performance and efficiency.

Within the Throttle Kit, the Control Rod Pivot Pin ensures that all components work in unison. It allows for the fine-tuning of throttle response, which is crucial for both the drivability and the overall performance of the engine.

Lastly, in conjunction with the Throttle Lever, the pin enables smooth and consistent throttle adjustments. This is particularly important in high-performance engines where precise throttle control can significantly impact engine responsiveness and driver experience.

Conclusion

The Control Rod Pivot Pin (Part #3990112) by Cummins is a vital component in the engine systems of heavy-duty trucks. Its robust design, precision engineering, and high-quality materials contribute to the efficient and reliable operation of the engine. Proper installation, maintenance, and troubleshooting are essential to ensure the longevity and performance of this part. Cummins’ commitment to quality and innovation is evident in the design and functionality of the Control Rod Pivot Pin, making it a trusted component in the automotive industry.