4890634
Regular Hexagon Nut
Cummins®

The Cummins Part #4890634 Regular Hexagon Nut is a critical component in the maintenance and operation of commercial trucks. It secures various truck components, contributing to the vehicle’s overall integrity and functionality. Understanding its specifications and applications is essential for maintaining the performance and safety of commercial trucks.

Basic Concepts of Regular Hexagon Nuts

A regular hexagon nut is a fastener characterized by its six-sided shape. This design offers several advantages, including enhanced grip and resistance to turning when tightened. The hexagonal shape allows for more consistent and secure fastening compared to other shapes, making it a popular choice in various mechanical applications. The design facilitates the use of common tools, such as wrenches and sockets, for installation and removal.

Purpose of the 4890634 Regular Hexagon Nut in Truck Operation

The 4890634 Regular Hexagon Nut serves a specific function in the operation and maintenance of commercial trucks. It is used to secure components within truck assemblies, ensuring that parts remain firmly in place under various operating conditions. Common applications include fastening engine components, securing chassis parts, and attaching body panels. Its role is to provide a reliable connection that can withstand the stresses and vibrations encountered in truck operation.

Key Features

The 4890634 Regular Hexagon Nut is designed with several key features that enhance its performance and durability. It is typically made from high-strength materials, such as alloy steel, to ensure it can withstand significant loads and stresses. The nut features a specific thread type that matches the bolts or studs it is intended to secure. Additionally, it may have special coatings or treatments to improve corrosion resistance and reduce the risk of seizing.

Benefits

Using the 4890634 Regular Hexagon Nut offers several benefits. Its design provides improved fastening security, helping to prevent loosening due to vibration. The material and coatings used enhance its resistance to corrosion and wear, contributing to its longevity in harsh operating conditions. These features make it a reliable choice for maintaining the integrity of truck components.

Installation Guidelines

Proper installation of the 4890634 Regular Hexagon Nut is essential to ensure its effectiveness. It should be installed using the correct tools, such as a torque wrench, to achieve the specified torque settings. This ensures that the nut is tightened to the appropriate level, providing a secure connection without over-tightening, which could damage the threads or the component being fastened. Following manufacturer guidelines for installation helps to maintain the performance and safety of the truck.

Troubleshooting and Maintenance

Regular inspection and maintenance of the 4890634 Regular Hexagon Nut can help identify and address common issues. Signs of wear, corrosion, or loosening should be addressed promptly to prevent failure. Maintenance tips include checking torque settings periodically and replacing nuts that show signs of damage or excessive wear. Proper lubrication can also help maintain the nut’s performance and extend its service life.

Safety Considerations

When working with the 4890634 Regular Hexagon Nut, it is important to follow safety protocols to prevent accidents. This includes using the correct tools and techniques for installation and removal, wearing appropriate personal protective equipment, and ensuring that the work area is clean and free from hazards. Adhering to these safety practices helps to protect both the technician and the vehicle.

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and commitment to quality, Cummins serves customers in approximately 190 countries and territories through a network of more than 600 company-owned and independent distributor facilities and more than 7,200 dealer locations. The company’s product range includes diesel and natural gas engines, as well as related technologies that enhance engine performance and efficiency. Cummins is dedicated to providing reliable and efficient solutions for its customers, supporting the operation of commercial vehicles, industrial equipment, and power generation systems.

Cummins Regular Hexagon Nut 4890634 Compatibility

The Cummins Regular Hexagon Nut part number 4890634 is a versatile component designed to fit various Cummins engine models. This nut is engineered to meet the stringent requirements of Cummins’ diverse engine lineup, ensuring compatibility and reliability across different engine types.

B-Series Engines

• B4.5 CM2350 B129B
• B4.5 RGT
• B6.7 CM2670 B153B
• B6.7 CM2670 B164C

The B-Series engines, including the B4.5 and B6.7 variants, utilize the 4890634 nut in several critical applications. This nut is essential for securing various components within these engines, ensuring proper assembly and function.

F-Series Engines

• F2.8 CM2620 F135B
• F4.5 CM2620 F139B

The F-Series engines, such as the F2.8 and F4.5, also incorporate the 4890634 nut. This part is used in these engines to maintain the integrity of the assembly, providing a secure fastening solution for various engine components.

ISB Engines

• ISB (Chrysler)
• ISB CM2150
• ISB CM850
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB4.5 CM2350 B104
• ISB6.7 CM2250
• ISB6.7 CM2350 B101

The ISB engines, including both the 4.5 and 6.7-liter variants, are designed to use the 4890634 nut. This part is crucial for the assembly and maintenance of these engines, ensuring that all components are securely fastened.

ISBE Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

The ISBE engines, such as the CM2150 and CM800, also require the 4890634 nut. This part is integral to the assembly process, providing a reliable fastening solution for various engine components.

ISD Engines

• ISD4.5 CM2220 D108

The ISD4.5 engine utilizes the 4890634 nut in its assembly. This part is essential for securing components within the engine, ensuring proper function and reliability.

ISF Engine

• ISF3.8 CM2220 AN

The ISF3.8 engine incorporates the 4890634 nut. This part is crucial for the assembly and maintenance of the engine, providing a secure fastening solution for various components.

ISG Engines

• ISG11 CM2880 G108
• ISG12 CM2880 G107

The ISG engines, including the ISG11 and ISG12, use the 4890634 nut. This part is essential for the assembly and maintenance of these engines, ensuring that all components are securely fastened.

ISV Engine

• ISV (Nissan)

The ISV engine, designed for Nissan applications, also utilizes the 4890634 nut. This part is integral to the assembly process, providing a reliable fastening solution for various engine components.

QSB Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB5.9 CM850

The QSB engines, including the 4.5 and 5.9-liter variants, incorporate the 4890634 nut. This part is essential for the assembly and maintenance of these engines, ensuring that all components are securely fastened.

Role of Part 4890634 Regular Hexagon Nut in Engine Systems

Part 4890634, the Regular Hexagon Nut, is integral to the assembly and functionality of various engine components. Its primary role is to secure and maintain the integrity of connections within the engine system.

In the Accessory Drive system, this nut is employed to fasten components such as pulleys and brackets, ensuring they remain firmly attached to the engine block or other supporting structures. This secure attachment is vital for the smooth operation of accessories driven by the engine, such as alternators and air conditioning compressors.

Within the Camshaft Drive mechanism, the Regular Hexagon Nut is used to secure the camshaft sprocket or gear to the camshaft itself. This ensures precise timing and reliable operation of the valve train, which is essential for the engine’s performance and efficiency.

For the Front Sprocket Drive, this nut plays a role in attaching the front sprocket to the crankshaft or other drive components. This connection is fundamental for transmitting power from the engine to the accessory drive system, ensuring all connected accessories function correctly.

In the context of the Fuel Injection Pump and Fuel Pump, the Regular Hexagon Nut is utilized to secure these components to their mounting points. This secure attachment is necessary for the stable operation of the fuel system, ensuring consistent fuel delivery to the engine.

For the Fuel Pump Mounting, this nut is critical in attaching the fuel pump to its designated location within the engine bay or fuel tank. Proper mounting is essential for the fuel pump’s efficiency and longevity, directly impacting the engine’s fuel supply.

In Long Block Kit assemblies, the Regular Hexagon Nut is used throughout the kit to secure various components, from engine blocks to cylinder heads and ancillary parts. This ensures the structural integrity and operational reliability of the engine.

Within the Pump Fuel Injection system, this nut secures components of the fuel injection pump, ensuring they are correctly positioned and operate under the required pressures and timings for optimal fuel delivery.

Lastly, in the Rear Gear Train Accessory Drive, the Regular Hexagon Nut is used to secure gears and shafts, ensuring the reliable transmission of power from the engine to rear-mounted accessories. This is essential for the operation of components such as power steering pumps and other rear-mounted accessories.

Conclusion

The Cummins Part #4890634 Regular Hexagon Nut is a vital component in the maintenance and operation of commercial trucks and various Cummins engine models. Its design, featuring high-strength materials and specific thread types, ensures secure and reliable fastening of engine components. Proper installation, regular maintenance, and adherence to safety protocols are essential to maximize the performance and longevity of this part. Understanding its role and applications can significantly contribute to the overall efficiency and safety of commercial vehicles.