3945520
Round Head Cap Screw
Cummins®

The 3945520 Round Head Cap Screw is a component manufactured by Cummins, a well-established name in the commercial truck industry. This screw is designed for use in various applications within commercial trucks, contributing to the secure assembly of different mechanical components.

Basic Concepts of Round Head Cap Screws

A Round Head Cap Screw is a type of fastener characterized by a rounded head and a threaded shank. It is commonly used in mechanical assemblies to secure components together. The rounded head provides a larger surface area for distribution of clamping force, reducing the risk of damage to the fastened materials. Additionally, the head design allows for easy installation and removal using common tools ¹.

Purpose of the 3945520 Round Head Cap Screw in Truck Operation

The 3945520 Round Head Cap Screw plays a role in the operation and maintenance of commercial trucks by securing various components in place. It is utilized in areas where reliable fastening is required to ensure the structural integrity and functionality of the truck’s assemblies. Its application areas include, but are not limited to, engine components, chassis parts, and other critical assemblies where secure fastening is necessary ².

Key Features

The 3945520 Round Head Cap Screw is crafted from high-quality materials, ensuring durability and reliability in demanding truck environments. It features a specific thread type that provides strong clamping force, and its rounded head is designed for efficient torque application. Additionally, the screw may have special coatings or treatments to enhance its performance, such as corrosion resistance, which is vital for longevity in various operating conditions ³.

Benefits

Using the 3945520 Round Head Cap Screw offers several advantages. It provides improved fastening security due to its design and material properties. The screw’s resistance to corrosion ensures longevity, even in harsh environments. Furthermore, its design allows for ease of installation and removal, facilitating maintenance procedures ⁴.

Installation Guidelines

For proper installation of the 3945520 Round Head Cap Screw, it is recommended to follow specific torque specifications provided by the manufacturer to ensure optimal clamping force without over-tightening. Using the appropriate tools, such as a torque wrench, is advised to achieve the desired torque settings. Careful alignment and gradual tightening in stages can help prevent cross-threading and ensure a secure fit.

Troubleshooting and Maintenance

Common issues with Round Head Cap Screws include loosening over time, corrosion, or damage from over-tightening. Regular inspection and maintenance can help identify these issues early. If loosening is detected, re-tightening to the specified torque is recommended. In cases of corrosion, cleaning the affected area and applying a corrosion-resistant coating may be necessary. Damaged screws should be replaced to maintain the integrity of the assembly.

Compatibility and Application

The 3945520 Round Head Cap Screw is designed for use in specific applications within commercial truck assemblies. It is important to ensure compatibility with other components or systems to maintain the intended performance and reliability. When replacing or installing this screw, verifying its suitability for the application is crucial.

Cummins: Manufacturer Overview

Cummins Inc. is a leading manufacturer in the commercial truck industry, known for its wide range of products and commitment to quality and reliability. With a rich history of innovation and excellence, Cummins has established a strong reputation for producing high-quality components, including the 3945520 Round Head Cap Screw. The company’s focus on durability, performance, and customer satisfaction underscores the quality and reliability of its products.

Cummins Round Head Cap Screw 3945520 in Engine Applications

The Cummins Round Head Cap Screw part number 3945520 is a critical component in various Cummins engine models, ensuring secure fastening and structural integrity. This part is designed to withstand the demanding conditions within the engine environment, providing reliable performance and durability.

Application in Specific Engine Models

• 6B5.9 and QSB5.9 44 CM550 Engines

  In the 6B5.9 and QSB5.9 44 CM550 engines, the Round Head Cap Screw 3945520 is used to secure various engine components. Its application includes fastening parts that require precise alignment and tight tolerances, ensuring the engine operates smoothly and efficiently. The screw’s design allows for easy installation and removal, which is crucial during maintenance and repair operations.

• ISB CM550 Engine

  The ISB CM550 engine also utilizes the Round Head Cap Screw 3945520 for securing critical engine parts. This screw is integral to the assembly of components that must maintain their position under high stress and vibration. Its robust construction and precise fit are essential for the engine’s overall performance and longevity.

Importance in Engine Assembly

The Round Head Cap Screw 3945520 plays a vital role in the assembly of these engines by providing a dependable method to fasten and secure various parts. Its use in these models highlights its importance in maintaining the structural integrity and operational efficiency of the engines. The screw’s design and material ensure it can endure the harsh conditions within the engine compartment, contributing to the engine’s reliability and performance.

Role of Part 3945520 Round Head Cap Screw in Engine Systems

The Part 3945520 Round Head Cap Screw is integral to the assembly and maintenance of various engine components. Its primary function is to provide secure fastening, ensuring that parts remain firmly in place under operational stress.

Drive System

In the drive system, the Round Head Cap Screw is used to attach the drive components securely. This ensures that the drive mechanism operates smoothly without any slippage or misalignment, which is essential for the efficient transfer of power from the engine to the wheels.

Water Pump

For the water pump, the Round Head Cap Screw plays a key role in mounting the pump housing to the engine block. This secure attachment is vital for maintaining the integrity of the cooling system, ensuring that coolant flows efficiently to regulate engine temperature.

Fuel Pump Mounting

When it comes to the fuel pump, the Round Head Cap Screw is employed to mount the fuel pump securely within the fuel system. This attachment is important for maintaining the fuel pump’s position and ensuring consistent fuel delivery to the engine.

Idler Pulley

In the context of the idler pulley, the Round Head Cap Screw is used to fasten the pulley to its bracket. This secure fitting is necessary for the proper tensioning of the belt drive system, which in turn ensures the efficient operation of ancillary components like the alternator and air conditioning compressor.

General Mounting Applications

Across various mounting applications, the Round Head Cap Screw provides a reliable means of attaching components to the engine or chassis. Whether securing brackets, covers, or other ancillary parts, its role is to ensure that these components remain in place and function as intended.

Service Kit Integration

In service kits, the Round Head Cap Screw is often included to replace worn or damaged fasteners. This ensures that during maintenance or repair procedures, the technician has the correct hardware to reassemble the engine components securely.

Conclusion

Overall, the 3945520 Round Head Cap Screw is a fundamental component in the assembly and maintenance of engine systems, providing the necessary secure fastening for a wide range of applications. Its design, material, and application ensure reliable performance and durability in demanding truck environments.