3907240
Valve Tappet
Cummins®

The Valve Tappet 3907240, manufactured by Cummins, is a component designed for use in heavy-duty truck engines. Cummins, a well-established name in the automotive industry, produces this valve tappet to ensure reliable and efficient engine performance. The Valve Tappet 3907240 is integral to the operation of heavy-duty trucks, contributing to the overall functionality and durability of the engine.

Basic Concepts of Valve Tappets

A valve tappet, also known as a lifter, is a mechanical device used in internal combustion engines to transfer motion from the camshaft to the valves. Its primary function is to open and close the engine’s intake and exhaust valves in synchronization with the piston’s movement. The valve tappet interacts directly with the camshaft lobes and the valve mechanism, ensuring precise timing and efficient operation of the engine ¹.

Role of Valve Tappet 3907240 in Truck Operation

The Valve Tappet 3907240 plays a specific role within the engine’s valve train system. It is responsible for actuating the valves by receiving motion from the camshaft and transferring it to the valve stems. This part ensures that the valves open and close at the correct times, which is vital for maintaining engine performance. The efficient operation of the Valve Tappet 3907240 contributes to smooth engine running, optimal fuel combustion, and overall engine reliability.

Key Features of Valve Tappet 3907240

The Valve Tappet 3907240 is designed with several features that enhance its performance and durability. Constructed from high-quality materials, this valve tappet is built to withstand the rigorous conditions of heavy-duty truck engines. Its precise dimensions ensure a proper fit within the engine assembly, while its design may include features such as roller bearings to reduce friction and wear. These characteristics contribute to the tappet’s longevity and efficient operation.

Benefits of Using Valve Tappet 3907240

Utilizing the Valve Tappet 3907240 offers several advantages. The part’s design and construction help improve engine efficiency by ensuring smooth and reliable valve actuation. Reduced friction and wear on valve train components lead to enhanced engine performance and longevity. Additionally, the Valve Tappet 3907240 contributes to overall engine reliability, minimizing the risk of downtime and maintenance issues for heavy-duty trucks.

Troubleshooting and Maintenance Suggestions

To maintain optimal performance of the Valve Tappet 3907240, it is important to be aware of common issues and perform regular maintenance. Symptoms of a malfunctioning valve tappet may include unusual engine noises, decreased performance, or irregular idling. Diagnostic procedures should involve inspecting the tappet for signs of wear, checking the camshaft and valve train components for proper operation, and ensuring that all clearances are within specifications. Regular maintenance practices, such as lubrication and periodic inspection, can help prevent issues and ensure the longevity of the Valve Tappet 3907240 ².

Cummins: Manufacturer Overview

Cummins Inc. is a globally recognized leader in the design, manufacture, and distribution of engines and related technologies. With a history spanning over a century, Cummins has built a reputation for producing high-quality engine components. The company is committed to innovation and excellence, ensuring that its products, like the Valve Tappet 3907240, meet the demanding requirements of heavy-duty applications. Cummins’ dedication to quality and performance makes it a trusted name in the automotive industry.

Valve Tappet 3907240 Compatibility with Cummins Engines

The Cummins Valve Tappet part number 3907240 is designed to fit a variety of Cummins engines, ensuring compatibility across multiple models. Here’s a detailed breakdown of the engines with which this part is compatible:

4B3.9 and 6B5.9 Engines

The Valve Tappet 3907240 is suitable for use in the 4B3.9 and 6B5.9 engines. These engines are part of the Cummins B Series, known for their robust performance and reliability in various applications.

6C8.3 and C8.3 G Engines

This part also fits the 6C8.3 and C8.3 G engines. The C Series engines, including the 6C8.3 and C8.3 G, are recognized for their durability and efficiency, making them a popular choice in heavy-duty applications.

B3.9 G and B5.9 G Engines

The Valve Tappet 3907240 is compatible with the B3.9 G and B5.9 G engines. These engines are part of the B Series, which offers a balance of power and efficiency, suitable for a wide range of uses.

B5.9 GAS PLUS CM556 and C GAS PLUS CM556 Engines

This part is also suitable for the B5.9 GAS PLUS CM556 and C GAS PLUS CM556 engines. These engines are equipped with advanced gas systems, enhancing their performance and efficiency.

G5.9 and G5.9 CM558 Engines

The Valve Tappet 3907240 fits the G5.9 and G5.9 CM558 engines. These engines are part of the G Series, known for their reliability and performance in demanding environments.

G8.3 and ISB5.9G CM2180 Engines

Lastly, this part is compatible with the G8.3 and ISB5.9G CM2180 engines. The ISB Series engines, including the ISB5.9G CM2180, are designed for high performance and efficiency, making them ideal for heavy-duty applications.

Role of Part 3907240 Valve Tappet in Engine Systems

The part 3907240 Valve Tappet is an essential component in the operation of both long block and short block engine systems. In these configurations, the Valve Tappet interfaces directly with the camshaft and valve train components to ensure precise and efficient engine performance.

Interaction with the Camshaft and Follower

In the engine system, the Valve Tappet acts as a mediator between the camshaft and the valve follower. As the camshaft rotates, driven by the crankshaft via a timing belt or chain, it imparts motion to the Valve Tappet. This motion is then transferred to the valve follower, which in turn actuates the valve. The Valve Tappet ensures that the motion from the camshaft is transmitted smoothly and accurately, allowing for the proper opening and closing of the engine’s valves. This precise timing is vital for the intake and exhaust processes, directly influencing the engine’s efficiency and power output.

Integration in Long Block and Short Block Configurations

In a long block engine, which includes the cylinder block, crankshaft, pistons, connecting rods, camshaft, and valve train components, the Valve Tappet plays a significant role in maintaining the integrity of the valve operation. The long block is essentially a fully assembled engine minus ancillary components like the fuel system, ignition system, and exhaust system. Here, the Valve Tappet ensures that the valve train components work in harmony, contributing to the engine’s overall performance.

Conversely, in a short block engine, which typically consists of the cylinder block, crankshaft, pistons, and connecting rods, the Valve Tappet is still a fundamental component when the valve train is included. Even though the short block does not come with the camshaft or valve train installed, the Valve Tappet is crucial once these components are added. It ensures that the valve train operates efficiently, allowing the engine to function correctly once the remaining components are integrated.

Ensuring Smooth Operation

The Valve Tappet’s design allows it to absorb some of the shock and vibration generated during the valve operation, which helps in reducing wear and tear on other components. This characteristic is particularly important in high-performance engines where the Valve Tappet must withstand greater stresses and operate at higher speeds.

Conclusion

In summary, the part 3907240 Valve Tappet is a key component in both long block and short block engine systems, facilitating the smooth and accurate transfer of motion from the camshaft to the valve train. Its role in ensuring the precise operation of the valves is fundamental to the engine’s performance and longevity ³.