137890
Hexagon Head Cap Screw
Cummins®

The Cummins Hexagon Head Cap Screw (Part #137890) is a specialized fastener designed for heavy-duty truck applications. It is engineered to provide reliable and robust fastening solutions, ensuring the integrity and performance of various truck components. This screw is significant in maintaining the structural and functional aspects of heavy-duty trucks, contributing to their overall efficiency and durability.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a type of fastener characterized by its hexagonal head, which allows for efficient tightening and loosening using a wrench or socket. The design of the hexagon head provides a secure grip, minimizing the risk of cam-out during installation. These screws are commonly used in applications requiring high torque and secure fastening, making them ideal for heavy-duty environments ¹.

Role of the 137890 Hexagon Head Cap Screw in Truck Operations

This Cummins part plays a role in the operation and maintenance of heavy-duty trucks by securing various components such as engine parts, chassis elements, and other critical assemblies. Its applications include fastening engine blocks, transmission components, and structural supports, ensuring that these parts remain securely in place under demanding conditions.

Key Features of the 137890 Hexagon Head Cap Screw

The 137890 features a robust material composition, typically consisting of high-grade steel, which provides excellent strength and durability. It has a specific thread type that ensures a tight and secure fit, reducing the likelihood of loosening over time. The head design is optimized for tool engagement, facilitating easy installation and removal. These features collectively contribute to the screw’s performance and longevity in heavy-duty applications ².

Benefits of Using the 137890 Hexagon Head Cap Screw

Using this part offers several benefits. Its enhanced strength ensures that it can withstand high loads and stresses common in heavy-duty truck operations. The screw’s corrosion resistance prolongs its service life, even in harsh environments. Additionally, its design allows for ease of installation, reducing downtime during maintenance procedures.

Installation and Usage Guidelines

Proper installation of the 137890 involves several steps. First, ensure that the mating surfaces are clean and free of debris. Use the appropriate wrench or socket to tighten the screw to the specified torque settings, which can be found in the manufacturer’s guidelines. It is recommended to use a torque wrench to achieve the correct tightening force, ensuring optimal performance and safety ³.

Maintenance and Troubleshooting

To maintain the 137890, regular inspections should be conducted to check for signs of wear, corrosion, or loosening. If any issues are detected, the screw should be tightened or replaced as necessary. Common troubleshooting methods include re-torquing the screw to the manufacturer’s specifications and applying a thread locker to prevent loosening.

Safety Considerations

When handling and installing the 137890, it is important to follow safety practices. This includes wearing personal protective equipment (PPE) such as gloves and safety glasses to protect against injuries. Additionally, ensure that the work area is clean and free of hazards, and follow all recommended safety guidelines provided by the manufacturer.

Cummins: A Brief Overview

Cummins Inc. is a renowned manufacturer with a long-standing reputation for producing high-quality automotive components. The company has a history of innovation and excellence in the industry, providing reliable and durable parts for various applications. Cummins’ commitment to quality is evident in their range of products, including the 137890, which is designed to meet the demanding requirements of heavy-duty truck operations.

Hexagon Head Cap Screw 137890 in Cummins Engines

The Cummins Hexagon Head Cap Screw part number 137890 is a versatile component that plays a role in the assembly and maintenance of various Cummins engines. This screw is designed to provide a secure fastening solution, ensuring that parts are held together firmly and reliably.

G-Series Engines

The G-Series engines, including the G855, G855 CM558, GTA855 CM558 (CM2358), and NH/NT 855, utilize the 137890 screw in several critical applications. These engines are known for their robust design and are often used in heavy-duty applications. The screw’s ability to withstand high torque and stress makes it an ideal choice for securing various components within these engines.

K-Series Engines

In the K-Series engines, such as the K19, K38, and K50, the 137890 screw is used to fasten parts that require a high level of precision and strength. These engines are designed for durability and efficiency, and the screw’s design ensures that all fastened parts remain securely in place under demanding conditions.

QSK-Series Engines

The QSK-Series engines, which include the QSK19 CM500, QSK19 CM850 MCRS, QSK19G, QSK38 CM2150 MCRS, QSK38 CM850 MCRS, QSK50 CM2150 K107, QSK50 CM2150 MCRS, and QSK50 CM2350 K108, also benefit from the use of the 137890 screw. These engines are engineered for high performance and reliability, and the screw’s design ensures that all components are fastened securely, contributing to the overall efficiency and longevity of the engine.

N-Series Engines

The N-Series engines, specifically the N14 G and N14 MECHANICAL, incorporate the 137890 screw in their assembly. These engines are known for their power and efficiency, and the screw’s design ensures that all parts are held together firmly, allowing the engine to operate smoothly and reliably.

KTA38GC CM558 G101

The KTA38GC CM558 G101 engine also utilizes the 137890 screw in its construction. This engine is designed for heavy-duty applications, and the screw’s ability to provide a strong and reliable fastening solution makes it an essential component in ensuring the engine’s performance and durability.

Role of Part 137890 Hexagon Head Cap Screw in Engine Systems

Part 137890 is integral to the assembly and functionality of various engine components. Its application spans across multiple systems, ensuring secure fastening and reliable operation.

Corrosion Mounting Resistor and Corrosion Resistor Mounting

In the corrosion mounting resistor and corrosion resistor mounting setups, Part 137890 is used to secure components that are exposed to corrosive environments. This ensures that the resistors remain firmly in place, maintaining electrical integrity and preventing failure due to environmental factors.

EBM: Location and Turbo

For the EBM (Electric Blower Motor) location and turbo applications, the Hexagon Head Cap Screw plays a role in securing the EBM to its designated position and fastening turbo components. This is essential for the proper functioning of the turbo, enhancing engine performance and efficiency.

Exhaust Manifold Mounting and Exhaust Mounting Manifold

In the exhaust manifold mounting and exhaust mounting manifold systems, Part 137890 is utilized to secure the exhaust manifold to the engine block. This ensures a tight seal, preventing exhaust leaks and maintaining optimal engine performance.

Fan Drive Arrangement and Filter Hose

The fan drive arrangement relies on the Hexagon Head Cap Screw to secure the fan to the engine, ensuring efficient cooling. Similarly, in the filter hose system, it is used to attach the hose to the filter housing, maintaining a secure connection and preventing leaks.

L.O. Bypass, Gear Cover Mounting, and Lubricating Oil Suction Mounting

For the L.O. (Lubricating Oil) bypass, gear cover mounting, and lubricating oil suction mounting, Part 137890 ensures that these critical components are securely fastened. This is vital for maintaining the integrity of the lubrication system, which is essential for engine longevity.

Lubricating Oil Tube and Lubricating Suction Tube

In the lubricating oil tube and lubricating suction tube systems, the Hexagon Head Cap Screw is used to secure these tubes in place. This ensures a consistent flow of lubricating oil, which is crucial for reducing friction and wear within the engine.

Marine Gear Mounting and Mounting Pulley

For marine gear mounting and mounting pulley applications, Part 137890 is essential for securing these components. This ensures that the marine gear and pulleys operate smoothly, contributing to the overall efficiency of the engine system.

MTG. Alternator and MTG. Exhaust Manifold

In the MTG. (Mounting) alternator and MTG. exhaust manifold systems, the Hexagon Head Cap Screw is used to secure these components to the engine. This ensures that the alternator functions correctly and that the exhaust manifold is properly attached, preventing leaks and maintaining performance.

Oil Gauge Tube, Oil Pan, and Raw Water Pump

For the oil gauge tube, oil pan, and raw water pump, Part 137890 is utilized to secure these components. This ensures accurate oil level readings, maintains the integrity of the oil pan, and ensures the raw water pump operates efficiently.

Right Bank Cam Cover, Sea Water Pump Support, and Tube Lubricating Oil Suction Mounting

In the right bank cam cover, sea water pump support, and tube lubricating oil suction mounting systems, the Hexagon Head Cap Screw is essential for securing these components. This ensures the cam cover remains in place, the sea water pump is supported correctly, and the lubricating oil suction tube is securely mounted.

Turbocharger and Turbocharger Conversion Kit

Finally, in the turbocharger and turbocharger conversion kit applications, Part 137890 is used to secure turbocharger components. This ensures that the turbocharger operates efficiently, contributing to enhanced engine performance and power output.

Conclusion

The Cummins Hexagon Head Cap Screw (Part #137890) is a critical component in the assembly and maintenance of heavy-duty trucks and various Cummins engines. Its robust design, high-grade material, and secure fastening capabilities ensure the integrity and performance of critical engine components. Proper installation, maintenance, and adherence to safety guidelines are essential for maximizing the benefits of this part in heavy-duty applications.