3901846
Pin Dowel
Cummins®

The Cummins 3901846 Pin Dowel is a specialized component designed for use in heavy-duty truck applications. Its purpose is to ensure precise alignment and stability between mating parts within the engine or transmission system. This component is significant due to its role in maintaining the integrity and performance of critical truck components.

Basic Concepts of Pin Dowels

A pin dowel is a cylindrical rod used in mechanical assemblies to align and secure components. It contributes to the stability and alignment of parts by fitting into corresponding holes, ensuring that components remain in the correct position relative to each other. This alignment is essential for the proper functioning and durability of mechanical systems ¹.

Purpose of the 3901846 Pin Dowel

The 3901846 Pin Dowel plays a specific role in the operation of a truck by ensuring accurate alignment between components within the engine or transmission system. It helps maintain the precise positioning of parts, which is vital for the efficient operation and longevity of the truck’s mechanical systems.

Key Features

The 3901846 Pin Dowel is characterized by its material composition, typically made from high-strength steel, which ensures durability and resistance to wear. Its dimensions are designed to fit specific applications, and its design includes features that enhance performance and longevity, such as a smooth surface finish to reduce friction and wear.

Benefits

Using the 3901846 Pin Dowel offers several benefits, including improved alignment of components, reduced wear on mating parts, and enhanced overall performance of the truck’s mechanical systems. These factors contribute to the reliability and efficiency of the truck.

Installation Process

Proper installation of the 3901846 Pin Dowel involves several steps to ensure correct placement and function. This includes cleaning the mating surfaces, aligning the dowel with the corresponding holes, and securing it in place. Tools such as a press or hammer may be required to ensure the dowel is properly seated.

Troubleshooting Common Issues

Common issues with the 3901846 Pin Dowel may include misalignment or wear. Troubleshooting steps involve inspecting the dowel and mating surfaces for damage, ensuring proper alignment during installation, and replacing the dowel if necessary to maintain system integrity.

Maintenance Tips

Regular maintenance of the 3901846 Pin Dowel includes periodic inspection for signs of wear or damage, cleaning the dowel and mating surfaces to remove debris, and ensuring that it remains properly seated. These practices help ensure longevity and optimal performance of the component.

Role in Engine or Transmission System

The 3901846 Pin Dowel interacts with other components within the engine or transmission system by providing precise alignment and stability. Its contribution to the overall efficiency and reliability of the truck is significant, as it helps maintain the correct positioning of critical parts.

Compatibility with Other Cummins Components

The 3901846 Pin Dowel is designed to be compatible with other Cummins components, ensuring seamless integration into various truck models. Its use across different applications highlights its versatility and importance in maintaining system performance.

Historical Development

The development of pin dowels, including the 3901846 Pin Dowel by Cummins, reflects advancements in mechanical design and manufacturing. The evolution of these components has led to improved performance, durability, and reliability in heavy-duty truck applications ².

About Cummins

Cummins Inc. is a leading manufacturer in the heavy-duty truck industry, known for its wide range of products and strong reputation for quality and innovation. The company’s commitment to excellence is evident in its components, including the 3901846 Pin Dowel, which plays a vital role in the performance and reliability of heavy-duty trucks.

Pin Dowel 3901846 Compatibility with Cummins Engines

The Pin Dowel part number 3901846, manufactured by Cummins, is a crucial component that fits into various Cummins engine models. This pin dowel is designed to provide stability and alignment in the engine assembly, ensuring that moving parts operate smoothly and efficiently. Here is a detailed look at the engines with which this pin dowel is compatible:

15N Series

• 15N CM2380

M104 Series

• M104B

6C8.3 Series

• 6C8.3
• GTA8.3 CM558

C8.3 Series

• C8.3 G
• G8.3
• G8.3 CM558

ISC Series

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

ISL Series

• ISL CM2150
• ISL CM554
• ISL G CM2180
• ISL9 CM2150
• ISL9 CM2250
• ISL9.5 CM2880 L138

ISX Series

• ISX CM570
• ISX CM870
• ISX CM871
• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250
• ISX15 CM2250
• ISX15 CM2250 SN

Grouping by Series

15N Series

The 15N CM2380 engine benefits from the Pin Dowel 3901846 by ensuring precise alignment and stability in its components, contributing to the engine’s overall performance and longevity.

M104 Series

The M104B engine utilizes the Pin Dowel 3901846 to maintain the integrity of its moving parts, ensuring smooth operation and reducing wear and tear.

6C8.3 Series

Engines such as the 6C8.3 and GTA8.3 CM558 rely on the Pin Dowel 3901846 for critical alignment, which is essential for maintaining the balance and efficiency of the engine.

C8.3 Series

The C8.3 G, G8.3, and G8.3 CM558 engines incorporate the Pin Dowel 3901846 to ensure that the engine’s internal components remain properly aligned, enhancing performance and durability.

ISC Series

The ISC CM2150, ISC CM554, ISC CM850, and ISC8.3 CM2250 engines use the Pin Dowel 3901846 to provide the necessary stability and alignment for their components, ensuring reliable operation.

ISL Series

The ISL CM2150, ISL CM554, ISL G CM2180, ISL9 CM2150, ISL9 CM2250, and ISL9.5 CM2880 L138 engines all depend on the Pin Dowel 3901846 for maintaining the precise alignment of their parts, which is crucial for optimal engine performance.

ISX Series

The ISX CM570, ISX CM870, ISX CM871, ISX12 CM2350 X102, ISX12 G CM2180 EJ, ISX12/ISX11.9 CM2250, ISX15 CM2250, and ISX15 CM2250 SN engines all utilize the Pin Dowel 3901846 to ensure that their components are correctly aligned, contributing to the engine’s efficiency and longevity.

Role of Part 3901846 Pin Dowel in Engine Systems

The 3901846 Pin Dowel is an essential component in various engine systems, ensuring precise alignment and stability between mating parts. Its application spans across several key components, contributing to the overall performance and reliability of the engine.

Integration with Cylinder Block and Short Block

In the cylinder block and short block assemblies, the 3901846 Pin Dowel aligns the crankshaft with the block, ensuring that the rotational axis is correctly positioned. This alignment is vital for the smooth operation of the engine, preventing undue stress on the crankshaft bearings and maintaining consistent engine performance.

Role in Crankshaft and Bearings

When installed in the crankshaft and main bearings, the Pin Dowel ensures that the crankshaft is correctly positioned within the engine block. This precise alignment is necessary to maintain the integrity of the main bearings, reducing wear and tear and enhancing the longevity of the crankshaft.

Application in Cylinder Head and Engine Piston

The Pin Dowel also plays a significant role in the cylinder head and engine piston arrangement. By ensuring that the cylinder head is correctly aligned with the block, it facilitates proper sealing and combustion efficiency. Similarly, in the piston arrangement, it helps in maintaining the correct orientation of the piston within the cylinder, which is essential for optimal engine performance.

Use in Turbocharger and Injector Systems

In turbocharger and injector systems, the 3901846 Pin Dowel ensures that these components are accurately positioned relative to the engine block. This precise alignment is necessary for the efficient operation of the turbocharger and the accurate fuel delivery by the injectors, both of which are critical for engine performance and efficiency.

Importance in Repair and Service Kits

In repair kits and service kits, the Pin Dowel is often included to ensure that during maintenance or overhaul, the components are reassembled with the correct alignment. This is particularly important in kits designed for the short block 6c and short block 6cta, where maintaining the original specifications is essential for restoring the engine to its optimal condition.

Contribution to Performance and Upfit Parts

For performance parts and upfit parts, the 3901846 Pin Dowel ensures that any modifications or upgrades to the engine maintain the necessary alignment and stability. This is especially important in high-performance engines where even minor misalignments can significantly impact engine performance and reliability.

Conclusion

The 3901846 Pin Dowel is a fundamental component in various engine systems, ensuring precise alignment and stability between mating parts. Its role in the cylinder block, crankshaft, cylinder head, turbocharger, and other critical components underscores its importance in maintaining engine performance and reliability.