3928870
Connecting Rod Bolt
Cummins®

Connecting rod bolts are essential components in heavy-duty truck engines, ensuring the secure connection between the piston and the crankshaft. This connection is crucial for the efficient transfer of power generated by the combustion process to the crankshaft, which in turn drives the vehicle. The 3928870 connecting rod bolt by Cummins is designed to meet the rigorous demands of heavy-duty applications, providing reliable performance and durability ¹.

Basic Concepts of Connecting Rod Bolts

Connecting rod bolts serve the fundamental purpose of fastening the connecting rod to the crankshaft. This connection allows the linear motion of the piston to be converted into rotational motion, which is then transmitted through the crankshaft to the rest of the drivetrain. The bolts must withstand significant stress and dynamic loads, making their design and material critical to engine performance and longevity ².

Role of the 3928870 Connecting Rod Bolt

The 3928870 connecting rod bolt by Cummins plays a specific role in maintaining the integrity of the connection between the piston and the crankshaft. It is engineered to handle the high stresses and vibrations inherent in heavy-duty truck engines. By securely fastening the connecting rod to the crankshaft, this bolt ensures that the power generated by the engine is efficiently transferred, contributing to the overall performance and reliability of the engine ³.

Key Features

The 3928870 connecting rod bolt is characterized by several key features that enhance its performance and durability. It is made from high-strength materials, typically alloy steel, which provides the necessary tensile strength and resistance to fatigue. The design specifications of this bolt include precise threading and a robust head design to ensure a secure fit and optimal load distribution. Additionally, the bolt may feature coatings or treatments to improve corrosion resistance and reduce friction, further enhancing its reliability in demanding environments ¹.

Benefits

The use of the 3928870 connecting rod bolt offers several benefits. Its high-strength material composition and precise engineering contribute to improved engine performance by ensuring a secure and durable connection between the piston and crankshaft. The enhanced durability of this bolt means it can withstand the rigors of heavy-duty use, reducing the likelihood of failure and the need for frequent replacements. Furthermore, the reliable operation of this bolt under heavy-duty conditions supports the overall efficiency and longevity of the engine ².

Troubleshooting and Maintenance

Common issues associated with connecting rod bolts include loosening, corrosion, and fatigue failure. Regular inspection and maintenance are crucial to identifying potential problems early. Maintenance practices for the 3928870 connecting rod bolt include checking for signs of wear or damage, ensuring proper torque during installation, and applying appropriate lubricants to reduce friction and wear. Addressing these issues promptly can help maintain the longevity and reliable operation of the connecting rod bolt ³.

Compatibility with Cummins Engines

The 3928870 connecting rod bolt is compatible with various Cummins engine models, ensuring smooth and reliable engine operation. Below is a detailed overview of its compatibility across different engine series:

6C8.3 Series

• 6C8.3 G
• 6C8.3 CM556

C8.3 Series

• C8.3
• C8.3 CM558

G8.3 Series

• G8.3
• G8.3 CM558
• GTA8.3 CM558

ISC Series

• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250

ISL9 Series

• ISL9 CM2150 SN

QSC Series

• QSC8.3 CM2880 C102
• QSC8.3 CM554
• QSC8.3 CM850 (CM2850)
• QSC9 CM2250 / QSL9 CM2250
• QSL9 CM850 (CM2850)

Each of these engines benefits from the use of the 3928870 connecting rod bolt, ensuring that the connecting rod remains securely attached to the crankshaft, which is vital for the engine’s performance and durability ³.

Role of Part 3928870 Connecting Rod Bolt in Engine Systems

The 3928870 connecting rod bolt is integral to the assembly and operation of various engine components. It secures the connecting rod to the crankshaft, ensuring the efficient transfer of force from the piston to the crankshaft. This bolt is essential in maintaining the structural integrity and alignment of the connecting rod and piston assembly within the cylinder block.

In the context of a Short Block or Long Block engine assembly, the connecting rod bolt plays a significant role. It ensures that the connecting rod remains firmly attached to the crankshaft, allowing for smooth and consistent rotational motion. This is vital for the proper functioning of the piston as it moves up and down within the cylinder.

When dealing with an Engine Overhaul Kit or Repair Kit, the connecting rod bolt is often replaced to ensure that all components are in optimal condition. Its proper installation is key to preventing any misalignment or wear that could lead to engine performance issues.

In a Cylinder Block assembly, the connecting rod bolt helps maintain the precise alignment of the piston and connecting rod. This alignment is necessary for the efficient combustion process, where the piston compresses the air-fuel mixture and transfers the resulting force to the crankshaft via the connecting rod.

For engines equipped with Fuel Injectors or Injector Plumbing, the stability provided by the connecting rod bolt ensures that the engine’s mechanical components operate smoothly. This stability is essential for consistent engine performance and efficiency.

Conclusion

The 3928870 connecting rod bolt by Cummins is a critical component in heavy-duty truck engines, ensuring the secure connection between the piston and the crankshaft. Its high-strength material, precise engineering, and compatibility with various Cummins engine models contribute to improved engine performance, durability, and reliability. Regular maintenance and proper installation of this bolt are essential for the efficient and consistent operation of the engine.

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