3678507
Ring Dowel
Cummins®

The Cummins 3678507 Ring Dowel is a critical component used in commercial trucks. This article provides an in-depth overview of its function, key features, benefits, and maintenance tips.

Basic Concepts of Ring Dowels

A ring dowel is a cylindrical pin used to align, locate, or secure components within an assembly. It ensures precise positioning and stability between mating parts. Ring dowels are commonly made from steel or other durable materials to withstand operational stresses ².

Function and Role in Truck Operation

The Cummins 3678507 Ring Dowel plays a crucial role in maintaining the alignment and stability of components within the truck’s engine or transmission assembly. By ensuring proper positioning, it contributes to the efficient operation and longevity of the truck’s mechanical systems ³.

Key Features

• Precision-machined for accurate fit
• Made from high-strength materials
• Designed for durability under operational stresses
• Facilitates proper alignment of components

Benefits

• Enhances the reliability of component alignment
• Contributes to the smooth operation of mechanical systems
• Helps prevent wear and damage due to misalignment
• Supports the overall performance and longevity of the truck

Troubleshooting and Maintenance

Regular inspection of the ring dowel for signs of wear or damage is recommended. If misalignment or excessive wear is detected, the ring dowel should be replaced to maintain optimal performance. Proper lubrication of surrounding components can also help prolong the life of the ring dowel ⁴.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Known for its commitment to quality and innovation, Cummins serves commercial, industrial, and automotive markets worldwide ⁵.

Compatibility of Ring Dowel Part 3678507 with Cummins Engines

The Ring Dowel part number 3678507, manufactured by Cummins, is designed to fit a variety of Cummins engines. This dowel is an essential component that aids in the proper alignment and function of the piston rings within the engine’s cylinders. Below is a detailed overview of the engines with which this part is compatible:

Compatible Engines

• 15N CM2380 M104B
• F4.5 CM2620 F141C
• ISX CM570
• ISX CM870
• ISX CM871
• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250
• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101
• ISZ13 CM2150 Z105
• QSF3.8 CM2880 F112
• QSX11.9 CM2250 ECF
• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105
• QSZ13 CM2150 Z101
• QSZ13 CM2150 Z102
• X15 CM2350 X116B
• X15 CM2350 X123B
• X15 CM2450 X134B
• Z13 Z108G
• Z14 CM2670 Z103B

Grouping of Compatible Engines

For ease of reference, the engines can be grouped based on their series and model variations:

• ISX Series

  • ISX CM570
  • ISX CM870
  • ISX CM871
  • ISX12 CM2350 X102
  • ISX12 G CM2180 EJ
  • ISX12/ISX11.9 CM2250
  • ISX15 CM2250
  • ISX15 CM2250 SN
  • ISX15 CM2350 X101

• QSX Series

  • QSX11.9 CM2250 ECF
  • QSX15 CM2250
  • QSX15 CM2250 ECF
  • QSX15 CM2350 X105

• QSZ Series

  • QSZ13 CM2150 Z101
  • QSZ13 CM2150 Z102

• X15 Series

  • X15 CM2350 X116B
  • X15 CM2350 X123B
  • X15 CM2450 X134B

• ISZ Series

  • ISZ13 CM2150 Z105

• Z Series

  • Z13 Z108G
  • Z14 CM2670 Z103B

• Other Models

  • 15N CM2380 M104B
  • F4.5 CM2620 F141C
  • QSF3.8 CM2880 F112

This compatibility ensures that the Ring Dowel part 3678507 can be used across a broad spectrum of Cummins engines, providing a reliable and consistent fit for maintenance and repair purposes ¹.

Understanding the Role of Part 3678507 Ring Dowel in Engine Systems

In the intricate assembly of engine systems, the part 3678507 Ring Dowel serves a significant function in ensuring the precise alignment and secure fitting of various components. This component is instrumental in maintaining the structural integrity and operational efficiency of the engine.

Integration with Cylinder Components

The Ring Dowel is pivotal in the assembly of the Cylinder (Kit) Block, Cylinder Block, and Cylinder Block Kit. It ensures that these components are correctly aligned during the assembly process. Proper alignment is essential for the uniform distribution of combustion forces and the prevention of undue stress on the cylinder walls ².

Role in Main Bearing Cap Assembly

In conjunction with the Main Bearing Cap and Main Bearing Cap Set, the Ring Dowel facilitates the accurate positioning of these caps relative to the crankshaft. This alignment is vital for the smooth rotation of the crankshaft and the efficient transfer of power from the pistons to the crankshaft ³.

Contribution to Oil Filtration System

Although indirectly, the Ring Dowel influences the performance of the Full Flow Oil Filter. By ensuring that all engine components are correctly aligned and fitted, it contributes to the overall stability of the engine, which in turn affects the efficiency of the oil filtration process. A stable engine environment allows for optimal oil flow and filtration, crucial for engine longevity and performance ⁴.

Ensuring Structural Integrity

The precise fitting provided by the Ring Dowel is not just about alignment; it’s about ensuring the structural integrity of the engine. In high-stress environments, such as those found in engine systems, components must be securely fitted to withstand the forces generated during operation. The Ring Dowel plays a key role in this aspect, contributing to the durability and reliability of the engine ⁵.

Conclusion

In summary, the Cummins 3678507 Ring Dowel, though a small component, has a substantial impact on the assembly and functioning of various engine components. Its role in alignment and secure fitting is fundamental to the overall performance and longevity of the engine system.