3681289
Shim
Cummins®

The Cummins 3681289 Shim is a specialized component designed for use in heavy-duty truck operations. Its primary role is to provide precise adjustments within the mechanical systems of these vehicles, ensuring optimal performance and reliability. Understanding the function and application of this shim is vital for maintaining the efficiency and longevity of heavy-duty trucks.

Basic Concepts of Shims

Shims are thin, often washer-like spacers used in mechanical systems to fill small gaps, provide support, or make fine adjustments. They are crucial for achieving the correct clearances and alignments in various components. By inserting shims between parts, mechanics can fine-tune the fit and function of mechanical assemblies, ensuring they operate within specified tolerances ¹.

Purpose of the 3681289 Shim

The Cummins 3681289 Shim serves a specific role in the operation of heavy-duty trucks. It is primarily used in engine components where precise clearances are necessary for optimal performance. This shim helps in maintaining the correct spacing between parts, which is essential for the efficient operation of the engine. Its application ensures that components function harmoniously, reducing wear and enhancing the overall reliability of the truck’s engine system ².

Key Features

The Cummins 3681289 Shim is characterized by several key features that make it suitable for its intended use. It is typically made from high-quality materials that offer durability and resistance to wear. The shim’s thickness is precisely engineered to provide the exact clearance needed for its application. Additionally, its design ensures easy installation and removal, facilitating maintenance and adjustments as required.

Benefits of Using the 3681289 Shim

Utilizing the Cummins 3681289 Shim offers several advantages. It enhances the precision of mechanical adjustments, leading to improved performance and reliability of the truck’s engine. The shim’s high-quality material composition ensures durability, reducing the need for frequent replacements. Moreover, its design allows for easy installation and adjustment, making it a practical choice for maintaining optimal engine performance ³.

Installation and Usage

Proper installation of the Cummins 3681289 Shim is crucial for its effective function. It should be inserted between the specified components with care to ensure it is correctly aligned and seated. Following the manufacturer’s guidelines for installation is recommended to avoid damaging the shim or the components it is meant to adjust. Regular checks should be performed to ensure the shim remains in place and is functioning as intended.

Troubleshooting and Maintenance

Common issues with the Cummins 3681289 Shim may include displacement or wear over time. Regular inspections can help identify these problems early. If the shim shows signs of wear or if the clearances it was designed to maintain are compromised, replacement may be necessary. Keeping the shim and its surrounding components clean and free from debris will also contribute to its longevity and effective function.

Common Applications

The Cummins 3681289 Shim is typically used in various engine models and components within heavy-duty trucks. Its application is widespread in engines where precise clearances are critical for performance. Specific components that may require this shim include valve trains, bearing assemblies, and other parts where fine adjustments are necessary for optimal operation.

Manufacturer Information - Cummins

Cummins is a renowned manufacturer in the automotive and heavy-duty truck industry, known for its commitment to producing high-quality components. Their reputation is built on a history of innovation, reliability, and excellence in engineering. Cummins components, including the 3681289 Shim, are designed with precision and durability in mind, ensuring they meet the demanding requirements of heavy-duty applications.

Shim Part 3681289 Compatibility with Cummins Engines

The Shim part 3681289, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is crucial for ensuring proper alignment and operation of the engine components. Below is a detailed description of its compatibility across different engine models.

ISX Series

• ISX CM570
• ISX CM870
• ISX CM871

The Shim part 3681289 is compatible with the ISX series engines, including the ISX CM570, ISX CM870, and ISX CM871. This part is essential for maintaining the correct clearance and alignment between various engine components, ensuring optimal performance and longevity.

ISX15 Series

• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

For the ISX15 series, the Shim part 3681289 fits the ISX15 CM2250, ISX15 CM2250 SN, and ISX15 CM2350 X101 engines. This part plays a critical role in the assembly and operation of these engines, ensuring that all moving parts operate smoothly and efficiently.

QSX15 Series

• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

The Shim part 3681289 is also compatible with the QSX15 series engines, including the QSX15 CM2250, QSX15 CM2250 ECF, and QSX15 CM2350 X105. This part is vital for maintaining the precise spacing required between engine components, contributing to the overall reliability and performance of these engines.

X15 Series

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

Finally, the Shim part 3681289 fits the X15 series engines, which include the X15 CM2350 X116B, X15 CM2350 X123B, and X15 CM2450 X134B. This part is essential for ensuring that the engine components are correctly aligned, which is crucial for the smooth operation and durability of these engines.

Role of Part 3681289 Shim in Engine Systems

In the context of engine systems, part 3681289 Shim is instrumental in ensuring the precise operation of various components. Its primary function is to provide the necessary clearance adjustments between moving parts, which is essential for the efficient operation of the engine.

Lubricating Oil Pump

The lubricating oil pump is a vital component responsible for circulating oil throughout the engine to reduce friction and wear. Part 3681289 Shim is used to maintain the correct clearance between the pump’s rotor and stator. This ensures that the pump operates within its optimal performance range, providing consistent oil pressure and flow.

Lubricating Oil Pump Kit

A lubricating oil pump kit typically includes various components designed to facilitate the overhaul or repair of the oil pump. The inclusion of part 3681289 Shim in this kit allows for fine-tuning the clearances during reassembly. This ensures that the pump functions correctly post-repair, maintaining the engine’s lubrication efficiency.

Lubricating Pump Kit

Similar to the lubricating oil pump kit, the lubricating pump kit may contain additional components and accessories. Part 3681289 Shim plays a role in ensuring that all pump components are correctly aligned and spaced. This alignment is key to the pump’s reliability and longevity, directly impacting the engine’s overall performance.

Overhaul Kit

An overhaul kit is comprehensive, containing all necessary parts for a complete engine rebuild. Part 3681289 Shim is often included to assist in the precise reassembly of the engine’s components. Its use ensures that clearances are maintained according to manufacturer specifications, which is essential for the engine’s smooth operation post-overhaul.

Shims

Shims, in general, are thin pieces of material used to fill small gaps or spaces between components. Part 3681289 Shim is a specific type of shim designed for use in engine systems. Its application is widespread, from fine-tuning clearances in pumps to ensuring proper fitment in various engine components. The correct use of shims like part 3681289 is fundamental in achieving the desired performance and longevity of engine parts.

Conclusion

The Cummins 3681289 Shim plays a vital role in the maintenance and operation of heavy-duty truck engines. By providing precise clearance adjustments, this part ensures the efficient and reliable operation of engine components. Its use in various engine systems, including lubricating oil pumps and overhaul kits, underscores its importance in achieving optimal engine performance and longevity.