3945240
Threaded Spacer
Cummins®

The 3945240 Threaded Spacer is a component manufactured by Cummins, a well-established name in the commercial truck industry. This spacer is designed for use in various truck models, contributing to the efficient operation of the vehicle’s mechanical systems. Understanding its role, features, and benefits can help fleet operators and technicians maintain and optimize truck performance.

Basic Concepts of Threaded Spacers

Threaded spacers are mechanical components used to create distance between two parts in an assembly. They are threaded on one or both ends, allowing them to be screwed into place. In the automotive industry, threaded spacers serve multiple functions, including adjusting clearances, aligning components, and distributing loads evenly ¹. They are essential in ensuring that parts fit together correctly and function as intended.

Purpose of the 3945240 Threaded Spacer

The 3945240 Threaded Spacer plays a specific role in the operation of commercial trucks. It is used to maintain proper spacing and alignment between components within the truck’s mechanical system. This ensures that parts operate within their designed parameters, reducing wear and enhancing overall performance. The spacer helps in distributing loads evenly, which is vital for the longevity and reliability of the truck’s mechanical components ².

Key Features

The 3945240 Threaded Spacer is engineered with several key features that enhance its performance and durability. It is made from high-quality materials, typically metal alloys, which provide strength and resistance to wear. The thread specifications are designed to ensure a secure fit, preventing loosening over time. Additionally, the spacer’s design includes features that facilitate easy installation and removal, making it a practical choice for fleet maintenance ³.

Benefits

Using the 3945240 Threaded Spacer offers several advantages. It contributes to improved mechanical performance by ensuring that components are properly aligned and spaced. This can lead to reduced wear and tear on other parts, enhancing the overall durability of the truck. Additionally, by maintaining optimal performance, the spacer can help in reducing maintenance costs and downtime for fleet operators.

Installation and Usage

Proper installation of the 3945240 Threaded Spacer is vital for its effective function. It should be installed using the appropriate tools to ensure a secure fit. Technicians should follow manufacturer guidelines to avoid over-tightening, which can damage the threads, or under-tightening, which can lead to improper spacing. Correct installation ensures that the spacer performs its intended role without issues.

Troubleshooting and Maintenance

Common issues with threaded spacers include loosening over time and wear due to vibrations. Regular inspections can help identify these problems early. If a spacer shows signs of wear or loosening, it should be replaced to maintain the integrity of the mechanical system. Proper maintenance, including checking for proper torque and ensuring no damage to the threads, can prolong the lifespan of the 3945240 Threaded Spacer.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has built a reputation for quality and reliability in the commercial truck industry. Their product range includes a variety of components and systems designed to enhance the performance and efficiency of commercial vehicles.

Compatibility with Cummins Engines

The Threaded Spacer part number 3945240, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is integral in ensuring proper assembly and functionality of the engine components.

ISC Series Engines

• ISC CM2150
• ISC8.3 CM2250

The Threaded Spacer 3945240 is compatible with the ISC series engines, including the ISC CM2150 and ISC8.3 CM2250. This part is essential for maintaining the structural integrity of the engine by providing a secure connection between threaded components.

ISL Series Engines

• ISL CM2150
• ISL CM554
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

The ISL series engines, such as the ISL CM2150, ISL CM554, ISL9 CM2150 SN, ISL9 CM2250, and ISL9.5 CM2880 L138, also utilize the Threaded Spacer 3945240. This part ensures that the threaded components are properly spaced and aligned, contributing to the overall efficiency and durability of the engine.

QSC and QSL Series Engines

• QSC9 CM2250/QSL9 CM2250
• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM2350 L102
• QSL9 CM850 (CM2850)

The Threaded Spacer 3945240 is also compatible with the QSC and QSL series engines. This includes the QSC9 CM2250/QSL9 CM2250, QSL8.9 CM2150 L141, QSL9 CM2250, QSL9 CM2350 L102, and QSL9 CM850 (CM2850). This part is crucial for these engines as it helps in maintaining the precise alignment and spacing of threaded components, ensuring optimal engine performance.

Role of Part 3945240 Threaded Spacer in Engine Systems

The 3945240 Threaded Spacer is an essential component in various engine systems, providing precise spacing and alignment that ensures optimal performance and efficiency.

Integration with Brake Systems

In brake systems, the 3945240 Threaded Spacer is utilized to maintain the correct distance between the brake caliper and the rotor. This spacing is vital for ensuring that the brake pads engage the rotor surface uniformly, which enhances braking efficiency and reduces wear on both the pads and the rotor. Proper alignment facilitated by the threaded spacer also minimizes vibrations and noise during braking, contributing to a smoother driving experience.

Application in Engine Assemblies

Within engine assemblies, the 3945240 Threaded Spacer plays a significant role in maintaining the integrity of the engine’s internal components. It is often used to ensure that sensors, such as the crankshaft position sensor or camshaft position sensor, are positioned at the correct distance from the rotating parts they monitor. This precise spacing is necessary for accurate readings, which in turn ensures the engine control unit (ECU) can make timely and correct adjustments to the engine’s operation.

Use in Engine Brake (12V) Kits

In engine brake (12V) kits, the 3945240 Threaded Spacer is employed to maintain the proper gap between the actuator and the valve it controls. This gap is essential for the actuator to function correctly, engaging and disengaging the engine brake as needed. The threaded spacer ensures that the actuator’s movement is smooth and within the specified tolerances, which is critical for the reliable operation of the engine brake system.

Function in Engine Brake Kits

For engine brake kits, the 3945240 Threaded Spacer is integral in ensuring that the components of the engine brake system are aligned correctly. It helps in maintaining the necessary clearance between the butterfly valve and the housing, allowing for efficient modulation of the exhaust flow. This precise spacing ensures that the engine brake can effectively reduce vehicle speed without causing undue stress on the engine or exhaust system.

Conclusion

The 3945240 Threaded Spacer, through its applications in various engine systems, demonstrates its versatility and importance in ensuring the smooth and efficient operation of automotive components. Its role in maintaining proper spacing and alignment between components is crucial for the longevity and reliability of commercial trucks. Proper installation, regular maintenance, and understanding its compatibility with different Cummins engines are essential for maximizing the benefits of this Cummins part.