4937420
Round Head Cap Screw
Cummins®

Introduction

The 4937420 Round Head Cap Screw is a component manufactured by Cummins, a prominent entity in the commercial truck industry. This screw is designed for 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 shaft. It is commonly used in mechanical assemblies to secure components together. The rounded head provides a larger surface area for distribution of clamping force, which helps in preventing damage to the material being fastened. Additionally, the head design allows for easy removal and installation using common tools ¹.

Purpose of the 4937420 Round Head Cap Screw in Truck Operations

This Cummins part plays a role in the operation and maintenance of commercial trucks by securing various components within the truck’s systems. Its applications can range from fastening engine components to securing parts of the truck’s frame and body. The screw ensures that these components remain firmly in place, which is vital for the truck’s performance and longevity.

Key Features

The 4937420 Round Head Cap Screw is crafted from high-quality materials, ensuring durability and reliability. It features a specific thread type that provides a strong grip, enhancing the security of the fastened components. The rounded head is designed for efficient torque application, and the screw may include special coatings or treatments to improve resistance to corrosion and wear ².

Benefits

Using the 4937420 Round Head Cap Screw offers several advantages. Its durable material composition ensures long-term performance, while any corrosion-resistant coatings enhance its suitability for use in various environments. The design of the screw facilitates easy installation, and its reliable fastening capability is particularly beneficial in high-stress applications typical in commercial truck operations.

Installation Guidelines

Proper installation of the 4937420 Round Head Cap Screw involves several steps to ensure secure fastening. It is important to use the correct torque specifications provided by the manufacturer to avoid over-tightening or under-tightening. Best practices include cleaning the fastening area to remove any debris and using the appropriate tools to apply even pressure during installation ³.

Troubleshooting and Maintenance

Common issues with Round Head Cap Screws, such as loosening, corrosion, or damage, can be addressed through regular maintenance and inspection. If a screw shows signs of wear or corrosion, it should be replaced to maintain the integrity of the assembly. Regular checks can help identify and resolve issues before they lead to more significant problems.

Cummins: Manufacturer Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a broad product range and a strong reputation in the commercial truck industry, Cummins is known for its commitment to quality and innovation. The company’s extensive history and expertise in engine technology underscore the reliability and performance of its components, including the 4937420 Round Head Cap Screw.

Cummins Engine Compatibility with Part 4937420

The Round Head Cap Screw, part number 4937420, manufactured by Cummins, is a versatile component that fits into various engine models. This screw is integral to the assembly and maintenance of several engine types, ensuring secure fastening and stability. Here’s how it aligns with different Cummins engines:

B-Series Engines

• B4.5 RGT
• B6.7 CM2350 B135B
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C
• B6.7 G CMOH6.0 B125

The B-Series engines, including the B4.5 RGT and various B6.7 models, utilize the 4937420 screw in their construction. This screw is essential for securing components such as valve covers and other critical parts, ensuring the engine operates smoothly and efficiently.

ISB Engines

• ISB CM2150
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104
• ISB5.9 CM2880 B110
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

The ISB engines, ranging from the ISB CM2150 to the ISBE4 CM850, incorporate the 4937420 screw in their design. This screw is used in various applications, including securing engine blocks, cylinder heads, and other structural components, ensuring the engine maintains its integrity under operational stress.

ISD Engines

• ISD4.5 CM2220 D108

The ISD4.5 CM2220 D108 engine also employs the 4937420 screw. This screw is critical in maintaining the structural integrity of the engine, particularly in securing components that are subject to high stress and vibration.

QSB Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850(CM2850)
• QSB5.9 CM2880 B115
• QSB6.7 CM2250
• QSB6.7 CM850(CM2850)
• QSB6.7 M CM2250
• QSB7 CM2880 B117

The QSB engines, from the QSB4.5 CM2250 EC to the QSB7 CM2880 B117, use the 4937420 screw in their assembly. This screw is vital for securing various engine components, ensuring the engine operates reliably and efficiently in demanding conditions.

Role of Part 4937420 Round Head Cap Screw in Engine Systems

The 4937420 Round Head Cap Screw is an essential fastening component utilized in various engine systems to ensure secure assembly and reliable operation.

Breather and Crankcase

In the breather and crankcase assembly, the 4937420 Round Head Cap Screw is employed to fasten critical components, ensuring that the breather system remains sealed and functions correctly. This screw helps maintain the integrity of the crankcase ventilation, which is vital for managing pressure and preventing the buildup of harmful gases.

Flywheel Housing Kit

Within the flywheel housing kit, the 4937420 Round Head Cap Screw plays a significant role in securing the housing to the engine block. This ensures that the flywheel is properly aligned and that the housing remains intact under operational stress, contributing to the smooth rotation of the flywheel and consistent engine performance.

Harness and Electronic Control Module Wiring

For the harness and electronic control module (ECM) wiring, the 4937420 Round Head Cap Screw is used to secure wiring harnesses and ECM components. This ensures that electrical connections remain stable and protected, reducing the risk of wire fatigue or disconnection, which could lead to engine malfunctions.

Housing and Flywheel

In the housing and flywheel assembly, the 4937420 Round Head Cap Screw is instrumental in attaching the housing to the engine, providing a robust connection that withstands the dynamic forces generated during engine operation. This secure attachment is essential for the flywheel’s balanced rotation and the overall stability of the engine.

Lever and Rocker

The 4937420 Round Head Cap Screw is also utilized in the lever and rocker mechanisms. It secures these components in place, ensuring that they operate with precision and reliability. Proper fastening of the lever and rocker is vital for accurate valve timing and efficient engine performance.

Conclusion

The 4937420 Round Head Cap Screw by Cummins is a critical component in the assembly and maintenance of commercial truck engines. Its durable construction, reliable fastening capabilities, and compatibility with various Cummins engine models make it an indispensable part in ensuring the performance and longevity of these engines.