6420839
Rocker Lever
Cummins®

The 6420839 Rocker Lever, manufactured by Cummins, is a component designed for use in commercial trucks. Cummins, a well-established name in the industry, produces a range of parts and engines known for their reliability and performance. This Cummins part is integral to the engine’s operation, ensuring efficient and smooth performance of the truck.

Basic Concepts of Rocker Levers

A rocker lever is a mechanical component that amplifies motion. It operates on the principle of leverage, where a small force applied at one end of the lever can result in a larger force at the other end ¹. In an engine, rocker levers are typically used to transfer motion from the camshaft to the valves, ensuring that the valves open and close at the correct times ².

Function and Role in Truck Operation

The 6420839 Rocker Lever plays a specific role in the operation of a truck engine. It is responsible for transferring motion from the camshaft to the valves. This transfer ensures that the valves open and close in sync with the engine’s operation, allowing for the intake and exhaust of gases. The precise timing and efficiency of this process are crucial for the engine’s performance and fuel efficiency ³.

Key Features

The 6420839 Rocker Lever is constructed from high-quality materials, ensuring durability and longevity. Its design includes specific elements that enhance its performance, such as a smooth surface for reduced friction and precise machining for accurate valve operation. These features contribute to the overall efficiency and reliability of the engine ⁴.

Benefits

The use of the 6420839 Rocker Lever offers several benefits. It contributes to improved engine efficiency by ensuring precise valve operation. Its durable construction enhances the longevity of the engine, reducing the need for frequent replacements. Additionally, the reduced friction and precise machining result in smoother engine operation and potentially lower maintenance costs.

Installation Process

Installing the 6420839 Rocker Lever requires careful attention to detail. The process involves removing the old lever, cleaning the area, and fitting the new lever in its place. Tools such as wrenches and screwdrivers may be required. It is important to ensure that the lever is correctly aligned and securely fastened to prevent any issues during engine operation.

Maintenance and Troubleshooting

Regular maintenance of the 6420839 Rocker Lever is important to ensure its continued efficient operation. This includes regular inspection for signs of wear or damage, cleaning to remove any debris or buildup, and lubrication to reduce friction. Troubleshooting common issues, such as misalignment or wear, can often be resolved through adjustment or replacement of the lever.

Common Issues and Solutions

Common issues associated with the 6420839 Rocker Lever may include wear and tear, misalignment, or malfunctions. These can often be identified through regular inspection and maintenance. Solutions may involve adjustment, cleaning, lubrication, or in some cases, replacement of the lever. Addressing these issues promptly can help maintain the efficiency and reliability of the engine.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a range of engines and related technologies. With a history spanning over a century, Cummins has established a reputation for quality, reliability, and innovation in the commercial truck industry. Their product range includes engines, filtration systems, and other components designed to enhance the performance and efficiency of commercial vehicles.

Compatibility of Rocker Lever Part 6420839 with Cummins Engines

The Rocker Lever part number 6420839, manufactured by Cummins, is designed to fit a variety of their engine models. This part is integral to the engine’s valve train system, ensuring proper operation of the engine’s valves. Here is a detailed look at the compatibility of this part with specific Cummins engines:

ISG11 CM2880 G108 and ISG12 CM2880 G107

The Rocker Lever part 6420839 is compatible with the ISG11 CM2880 G108 and ISG12 CM2880 G107 engines. These engines are part of the Cummins ISG series, which are designed for industrial applications. The CM2880 designation indicates a specific configuration within this series, and the G108 and G107 suffixes denote particular model variations. The Rocker Lever part ensures that the valve train operates smoothly, maintaining the engine’s performance and longevity.

ISG12 G CMOH6.0 G111

The Rocker Lever part 6420839 is also suitable for the ISG12 G CMOH6.0 G111 engine. This engine is part of the ISG series, featuring a CMOH6.0 configuration, which is tailored for high-performance industrial applications. The G111 model variation ensures that the Rocker Lever part fits perfectly, contributing to the engine’s efficient valve operation.

QSG12 CM2880 G112

The QSG12 CM2880 G112 engine is another model where the Rocker Lever part 6420839 is applicable. This engine belongs to the QSG series, which is designed for quick-service applications. The CM2880 configuration and the G112 model variation ensure that the Rocker Lever part is a precise fit, facilitating optimal valve train performance.

QSG12/X12 CM2350 G110

The Rocker Lever part 6420839 is compatible with the QSG12/X12 CM2350 G110 engine. This engine is part of the QSG series, featuring a CM2350 configuration, which is designed for quick-service applications. The G110 model variation ensures that the Rocker Lever part fits accurately, contributing to the engine’s efficient valve operation.

X12 CM2350 X119B

The Rocker Lever part 6420839 is also suitable for the X12 CM2350 X119B engine. This engine is part of the X series, which is designed for heavy-duty applications. The CM2350 configuration and the X119B model variation ensure that the Rocker Lever part fits perfectly, facilitating optimal valve train performance.

X12 CM2670 X121B

Lastly, the Rocker Lever part 6420839 is compatible with the X12 CM2670 X121B engine. This engine is part of the X series, featuring a CM2670 configuration, which is designed for heavy-duty applications. The X121B model variation ensures that the Rocker Lever part fits accurately, contributing to the engine’s efficient valve operation.

Conclusion

The 6420839 Rocker Lever is a critical component in the operation of Cummins engines, ensuring efficient valve operation and contributing to the overall performance and reliability of commercial trucks. Its compatibility with a range of Cummins engine models underscores its importance in the commercial truck industry. Regular maintenance and prompt troubleshooting of common issues can help maintain the efficiency and longevity of this part, ensuring optimal engine performance.