3901617
Twelve Point Cap Screw
Cummins®

Understanding the 3901617 Twelve Point Cap Screw by Cummins

Introduction to Twelve Point Cap Screws

A twelve point cap screw, also known as a twelve point bolt, is a specialized fastener featuring a hexagonal head with twelve flat sides. This unique design facilitates more efficient torque transfer compared to traditional six point screws, significantly reducing the risk of rounding off the head during installation or removal ¹. The twelve point configuration offers a superior grip, making it particularly advantageous in high-stress applications where reliability and durability are paramount.

Functionality and Importance of the 3901617 Twelve Point Cap Screw

The 3901617 twelve point cap screw by Cummins is meticulously engineered for use in commercial truck engines. Its primary function is to secure various engine components, ensuring they remain tightly fastened under the rigorous conditions of heavy-duty operations. This screw plays a critical role in maintaining the integrity of engine assemblies, effectively preventing loosening due to vibrations and thermal expansion. The reliability of these screws is essential for the consistent performance and longevity of the engine ².

Role in Truck Operation

Within the context of commercial trucks, the 3901617 twelve point cap screw is indispensable to the engine’s operation. It is utilized to fasten crucial parts such as cylinder heads, engine blocks, and other vital components. The dependability of these screws has a direct impact on the engine’s performance and durability, making them a fundamental element in the overall efficiency and safety of the vehicle. Ensuring these screws are properly installed and maintained is key to the smooth and reliable operation of commercial trucks.

Troubleshooting and Maintenance

Proper maintenance of the 3901617 twelve point cap screw is essential to prevent engine failures and ensure optimal performance. Regular inspections should be conducted to check for signs of wear, corrosion, or damage. If a screw is found to be loose or damaged, it should be replaced immediately to avoid potential engine issues.

When tightening or loosening these screws, it is imperative to use the correct torque specifications to prevent over-tightening, which can strip the threads or damage the screw head. Utilizing a calibrated torque wrench is recommended to ensure the correct torque is applied, thereby maintaining the integrity and performance of the engine components.

Cummins: A Leader in Engine Manufacturing

Cummins is a distinguished manufacturer of engines and related components for commercial vehicles. Their unwavering commitment to quality and innovation ensures that parts like the 3901617 twelve point cap screw meet the highest standards of performance and durability. Cummins’ extensive experience in the industry instills a level of trust and reliability that is crucial for fleet operators and mechanics. Their parts are designed to withstand the demanding conditions of commercial truck operations, providing peace of mind and ensuring the longevity of engine components.

Expert Insights

Understanding the specific requirements and applications of the 3901617 twelve point cap screw is vital for engineers and mechanics. Proper installation and maintenance of these screws can significantly extend the life of engine components and ensure the smooth operation of commercial trucks. By adhering to recommended practices and using high-quality parts, professionals can maintain the reliability and efficiency of their fleets, ultimately contributing to safer and more dependable vehicle performance.

Twelve Point Cap Screw 3901617 in Cummins Engines

The Twelve Point Cap Screw 3901617 is a critical component in various Cummins engines, ensuring structural integrity and secure fastening of parts. This screw is utilized across a range of Cummins engine models, demonstrating its versatility and importance in engine assembly.

6B5.9 and 6C8.3 Engines

In the 6B5.9 and 6C8.3 engines, the 3901617 screw is used in several key areas. These engines, known for their robust performance, require reliable fastening to maintain operational efficiency and safety. The screw’s twelve-point design provides better grip and torque, essential for the high-stress environments these engines operate in.

C GAS PLUS CM556 and L GAS PLUS CM556 Engines

For the C GAS PLUS CM556 and L GAS PLUS CM556 engines, the 3901617 screw is integral to the assembly of the gas injection system. Its precise fit and secure hold are crucial for the proper functioning of these components, ensuring optimal performance and longevity of the engine.

C8.3 G, G8.3, and G8.3 CM558 Engines

The C8.3 G, G8.3, and G8.3 CM558 engines also benefit from the use of the 3901617 screw. These engines, which are part of Cummins’ lineup of high-performance diesel engines, require the screw for various applications, including securing engine mounts and other critical assemblies. The screw’s strength and durability make it an ideal choice for these demanding applications.

GTA8.3 CM558 and QSL9 G CM558 Engines

In the GTA8.3 CM558 and QSL9 G CM558 engines, the 3901617 screw is used in the assembly of the exhaust and intake systems. These engines, known for their efficiency and power, depend on the screw to maintain the integrity of these vital systems, ensuring smooth operation and performance.

ISL G CM2180 and L8.9G CMOH2.0 L125B Engines

The ISL G CM2180 and L8.9G CMOH2.0 L125B engines incorporate the 3901617 screw in several key areas, including the engine block and various sub-assemblies. These engines, which are designed for heavy-duty applications, rely on the screw’s robust design to withstand the rigors of continuous operation.

L9.3 L105 Engine

Finally, the L9.3 L105 engine uses the 3901617 screw in its assembly, particularly in securing components that are subject to high stress and vibration. The screw’s twelve-point design ensures a tight and secure fit, contributing to the engine’s overall reliability and performance.

The consistent use of the Twelve Point Cap Screw 3901617 across these diverse Cummins engine models underscores its importance in maintaining the structural integrity and operational efficiency of the engines.

Role of Part 3901617 Twelve Point Cap Screw in Various Engine Components

The part 3901617 Twelve Point Cap Screw is instrumental in securing and maintaining the integrity of several engine components. In the Campaign Kit, this cap screw ensures that all modular parts are tightly fastened, providing stability during engine operations and facilitating easy assembly and disassembly for maintenance purposes.

Within the Compressor system, the Twelve Point Cap Screw plays a significant role in attaching the compressor housing to its mounting bracket. This secure attachment is essential for withstanding the high pressures and vibrations generated during compressor operation.

In Air Management Systems, the cap screw is used to fasten air ducts and manifolds. This ensures that air flows smoothly and efficiently through the engine, contributing to optimal performance and fuel efficiency.

The Lever and Rocker mechanisms also benefit from the use of the Twelve Point Cap Screw. These components require precise and secure fastening to function correctly. The cap screw ensures that the lever and rocker assemblies remain in place under the dynamic loads and movements they experience.

Similarly, the Rocker Lever system, which is pivotal in valve operation, relies on the Twelve Point Cap Screw to maintain the necessary tension and alignment. This is vital for the accurate timing and operation of the engine’s valves.

In the context of the Short Engine Kit, the Twelve Point Cap Screw is employed in various applications, including securing engine brackets, attaching ancillary components, and ensuring the overall structural integrity of the engine assembly. Its use throughout the kit highlights the screw’s versatility and importance in engine construction and maintenance.

Conclusion

The 3901617 Twelve Point Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial truck engines. Its unique design and robust construction ensure reliable fastening of engine components, contributing to the overall performance, safety, and longevity of the engine. Proper installation, maintenance, and adherence to torque specifications are essential to maximize the benefits of this part. Cummins’ commitment to quality and innovation further enhances the reliability and efficiency of their engine components, making the 3901617 a trusted choice for fleet operators and mechanics.