3914641
Camshaft Thrust Support
Cummins®

The Camshaft Thrust Support 3914641 by Cummins is a component designed to support the camshaft in heavy-duty truck engines. Its purpose is to maintain the camshaft’s proper alignment and reduce axial movement, which is vital for the engine’s operation. This part contributes to the overall efficiency and reliability of the engine by ensuring that the camshaft operates within specified tolerances ¹.

Function and Operation

The Camshaft Thrust Support 3914641 operates by providing a stable bearing surface for the camshaft. It helps in maintaining the camshaft’s alignment by counteracting the axial forces that occur during engine operation. This support is crucial for minimizing the camshaft’s end play, which can affect valve timing and engine performance. By reducing axial movement, the camshaft thrust support ensures that the camshaft remains in the correct position relative to the cylinder head, which is important for consistent valve operation ².

Key Features

The 3914641 Camshaft Thrust Support is constructed from high-quality materials that offer durability and resistance to wear. Its design includes precise machining to ensure a proper fit within the engine assembly. Unique characteristics of this part may include enhanced surface treatments to reduce friction and wear, as well as specific geometries that optimize its performance within the engine environment ³.

Role in Engine Performance

The Camshaft Thrust Support plays a role in ensuring smooth engine operation by maintaining accurate valve timing. Proper camshaft alignment is important for the engine’s efficiency, as it ensures that the valves open and close at the correct moments in the engine cycle. This part also contributes to the engine’s overall durability by reducing wear on the camshaft and related components, which can lead to improved longevity and performance of the engine.

Benefits

Using the 3914641 Camshaft Thrust Support is associated with several benefits. It contributes to improved engine reliability by ensuring that the camshaft operates within designed parameters. Reduced wear on the camshaft and associated components can lead to fewer maintenance intervals and lower repair costs. Additionally, the enhanced performance of the engine, due to precise valve timing, can result in better fuel efficiency and power output.

Installation and Compatibility

For the proper installation of the Camshaft Thrust Support, it is important to follow manufacturer guidelines to ensure optimal performance. This may involve specific torque settings for fasteners, proper alignment within the engine block, and verification of clearances with other engine components. Careful attention to these details during installation can help prevent issues and ensure the part functions as intended.

Maintenance and Troubleshooting

Regular maintenance practices for the Camshaft Thrust Support include periodic inspections for signs of wear or damage. Cleaning the part and its mating surfaces during routine engine maintenance can help prevent buildup that may affect performance. Common troubleshooting tips involve checking for proper camshaft alignment and ensuring that there is no excessive end play, which could indicate a problem with the thrust support or related components.

Cummins Corporation

Cummins Corporation is a well-established entity in the automotive industry, known for its high-quality components for heavy-duty trucks. With a history of innovation and a commitment to excellence, Cummins has built a reputation for producing reliable and durable parts. The company’s dedication to quality is reflected in the design and manufacturing of components like the 3914641 Camshaft Thrust Support, which are engineered to meet the demanding requirements of heavy-duty applications.

Compatibility with Cummins Engines

The Camshaft Thrust Support part number 3914641, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is crucial for maintaining the integrity and performance of the camshaft system by providing necessary support and reducing friction. Below is a detailed look at the compatibility of this part with various Cummins engines:

4B3.9 and 6B5.9 Engines

The 3914641 Camshaft Thrust Support is compatible with the 4B3.9 and 6B5.9 engines. These engines are known for their robust design and are often used in heavy-duty applications. The thrust support ensures that the camshaft operates smoothly, reducing wear and extending the engine’s lifespan.

6C8.3 and B5.9 G Engines

Similarly, the 6C8.3 and B5.9 G engines benefit from the use of the 3914641 Camshaft Thrust Support. These engines are typically used in a range of industrial and commercial applications, where reliability and performance are paramount. The thrust support helps maintain the camshaft’s alignment and reduces the risk of failure due to excessive movement.

B5.9 GAS PLUS CM556 and G5.9 Engines

The 3914641 part is also suitable for the B5.9 GAS PLUS CM556 and G5.9 engines. These engines are designed for high-performance applications and require components that can withstand significant stress and wear. The camshaft thrust support plays a vital role in ensuring the camshaft operates within its designed parameters, thereby enhancing the engine’s overall efficiency and longevity.

G5.9 CM558 and ISB CM550 Engines

The compatibility of the 3914641 Camshaft Thrust Support extends to the G5.9 CM558 and ISB CM550 engines. These engines are often found in various heavy-duty vehicles and machinery, where durability and performance are critical. The thrust support helps maintain the camshaft’s position and reduces the likelihood of mechanical issues, ensuring consistent engine performance.

ISB5.9G CM2180 Engine

Lastly, the 3914641 Camshaft Thrust Support is also designed to fit the ISB5.9G CM2180 engine. This engine is known for its high power output and efficiency, making it a popular choice in demanding applications. The thrust support is essential for maintaining the camshaft’s stability and reducing wear, thereby contributing to the engine’s overall reliability and performance.

Role of Part 3914641 Camshaft Thrust Support in Engine Systems

The camshaft thrust support, identified by part number 3914641, is an integral component in the orchestration of various engine systems. It ensures the camshaft remains properly aligned and supported within the cylinder block, which is essential for the synchronized operation of the engine’s moving parts.

Interaction with Key Engine Components

• Camshaft: The primary role of the camshaft thrust support is to maintain the camshaft’s position, preventing it from moving excessively within the cylinder block. This stability is vital for the camshaft to accurately control the timing of the valve operations, which in turn dictates the intake and exhaust cycles of the engine.

• Cylinder Block: Within the cylinder block, the camshaft thrust support is strategically positioned to offer resistance against the camshaft’s axial movement. This support is necessary to maintain the integrity of the camshaft’s operation and to ensure it interacts correctly with other components housed within the block.

• Cylinder Head: The camshaft thrust support indirectly affects the cylinder head by ensuring the camshaft’s valves open and close at the correct times. This timing is crucial for the combustion process, affecting both performance and efficiency.

• Connecting Rod and Piston: Proper camshaft alignment, facilitated by the thrust support, ensures that the valves open and close in harmony with the piston’s movement. This synchronization is essential for optimal engine performance, preventing issues such as valve-to-piston contact.

• Injector: In engines where fuel injection is employed, the camshaft’s precise operation, supported by the thrust support, ensures that fuel injection timing is accurately coordinated with the engine’s combustion cycle.

Relevance in Engine Assemblies

• Short Block and Long Block: Whether dealing with a short block or a long block, the camshaft thrust support plays a significant role. In a short block, it ensures the camshaft is correctly positioned for initial engine assembly. In a long block, it maintains camshaft alignment during operation, contributing to the engine’s overall performance.

• Service Block and Repair Kit: When engines are serviced or repaired, the camshaft thrust support is a component that may require attention. Its condition can affect the engine’s performance post-repair, making it a key consideration in service blocks and repair kits.

• Performance and Performance Parts: For engines modified for enhanced performance, the camshaft thrust support’s role becomes even more pronounced. High-performance camshafts require precise alignment and support to operate effectively, making the thrust support a component of interest in performance part upgrades.

Conclusion

In summary, the camshaft thrust support (part 3914641) is a fundamental component in ensuring the camshaft’s proper function within the engine. Its interaction with various engine components underscores its importance in maintaining engine performance, efficiency, and reliability.