5486993
Rocker Lever
Cummins®

The Cummins 5486993 Rocker Lever is a component designed for use in heavy-duty truck engines. It serves a significant role in the operation of these engines by facilitating the transfer of motion from the camshaft to the valves. A rocker lever, in general, is a mechanical device that amplifies the motion it receives, allowing for efficient operation of engine valves ¹.

Basic Concepts of Rocker Levers

Rocker levers operate on the principle of mechanical advantage, which allows them to transfer and amplify motion within an engine. Typically, a rocker lever system consists of the rocker arm, pivot point, and contact points for the camshaft and valve stem. The lever’s design enables it to convert the rotational motion of the camshaft into the linear motion required to open and close the engine valves ².

Purpose of the 5486993 Rocker Lever

This part is specifically engineered to interact with various engine components, including valves, camshafts, and pushrods. It plays a role in the valve train system by receiving motion from the camshaft via the pushrod and transferring this motion to the valve, ensuring precise and timely valve operation.

Key Features

This Cummins part is constructed from high-quality materials, ensuring durability and reliable performance. Its design includes features such as a hardened contact surface for interaction with the camshaft and valve, and a robust pivot point to withstand the stresses of heavy-duty engine operation. These elements contribute to the lever’s performance and longevity.

Benefits

The use of the 5486993 Rocker Lever in an engine can lead to improved efficiency and durability. Its design and material composition allow it to operate reliably under the demanding conditions typical of heavy-duty trucks, contributing to overall engine performance and longevity.

Installation and Compatibility

Proper installation of this part involves ensuring that all prerequisites are met and that any special considerations are addressed. This may include verifying the condition of mating surfaces and the alignment of components. Compatibility with specific engine models should be confirmed, and any necessary adjustments or modifications should be made according to the manufacturer’s guidelines.

Troubleshooting and Maintenance

Common issues with the 5486993 Rocker Lever may include wear at contact points or pivot issues. Troubleshooting steps may involve inspecting these areas for signs of wear or damage and addressing any issues found. Regular maintenance, including inspection intervals and recommended service procedures, can help ensure the longevity and optimal performance of the rocker lever.

Performance Enhancements

Modifications or upgrades to the 5486993 Rocker Lever can potentially enhance engine performance. Aftermarket options may offer improved materials or designs that can contribute to increased efficiency or durability. These enhancements should be considered in the context of the engine’s overall design and operating conditions.

Cummins Corporation

Cummins Corporation is a well-established manufacturer with a broad product range that includes engine components for heavy-duty trucks. The company is known for its commitment to quality and innovation, which is reflected in the design and performance of components like the 5486993 Rocker Lever. Cummins’ reputation in the industry is built on a history of delivering reliable and high-performance engine solutions ³.

Compatibility of Rocker Lever Part 5486993 with Cummins Engines

The Rocker Lever part 5486993, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is integral to the engine’s valve train system, ensuring proper valve operation and overall engine performance. Here is a detailed look at its compatibility across different engine models:

ISG11 CM2880 G108 and ISG12 CM2880 G107

This part is compatible with both the ISG11 CM2880 G108 and ISG12 CM2880 G107 engines. These engines are part of the Cummins ISG series, known for their reliability and efficiency in various industrial applications. The rocker lever ensures that the valves open and close at the correct times, facilitating smooth engine operation.

ISG12 G CMOH6.0 G111

This engine, part of the ISG series, also benefits from the Rocker Lever part 5486993. The compatibility of this part with the ISG12 G CMOH6.0 G111 engine ensures that the engine maintains its performance characteristics, providing consistent power and efficiency.

QSG12/X12 CM2350 G110

This part is also suitable for the QSG12/X12 CM2350 G110 engine. This engine is part of the QSG series, which is designed for applications requiring high power output and durability. The rocker lever’s role in this engine is crucial for maintaining the valve timing and ensuring the engine runs smoothly.

X11 CM2670 X126B, X12 CM2350 X119B, X12 CM2670 X121B, and X13 CM2670 X122B

This part is compatible with the X11 CM2670 X126B, X12 CM2350 X119B, X12 CM2670 X121B, and X13 CM2670 X122B engines. These engines are part of the X series, known for their versatility and robustness in various heavy-duty applications. The rocker lever ensures that the valves operate correctly, contributing to the engine’s overall performance and reliability.

Part 5486993 Rocker Lever Component Usage

The part 5486993 Rocker Lever is a component in the operation of the engine’s valve train system. It is designed to transfer motion from the camshaft to the valves, ensuring precise and efficient valve operation.

When the camshaft rotates, it actuates the rocker lever through direct contact or via a hydraulic lifter. This interaction causes the rocker lever to pivot, transferring the camshaft’s motion to the valve stem. The rocker lever amplifies the camshaft’s motion, allowing for greater valve lift and improved engine performance.

The rocker lever is mounted on the cylinder head, typically secured by a stud or bolt. It interfaces with the valve stem via a roller or flat tip, depending on the engine’s design. This connection ensures smooth and consistent valve actuation, minimizing wear and enhancing durability.

In engines with multiple valves per cylinder, the rocker lever may be part of a rocker arm assembly, which includes additional components such as shaft rockers or finger followers. These assemblies work in tandem to manage the complex valve train dynamics, ensuring synchronized valve operation across all cylinders.

The rocker lever’s role in the valve train system is fundamental to the engine’s overall efficiency and performance. By accurately transferring camshaft motion to the valves, it contributes to optimal combustion, improved fuel efficiency, and reduced emissions.

Conclusion

The 5486993 Rocker Lever is a critical component in the valve train system of Cummins engines, ensuring precise and efficient valve operation. Its compatibility with various Cummins engine models underscores its versatility and importance in maintaining engine performance. Proper installation, regular maintenance, and potential performance enhancements can further optimize the functionality of this part, contributing to the overall reliability and efficiency of heavy-duty truck engines.