4078617
Studded Flange Cap Screw
Cummins®

Studded flange cap screws are essential components in the assembly and maintenance of commercial trucks. They are widely used for their ability to provide secure fastening in various applications. The 4078617 Studded Flange Cap Screw by Cummins is a prime example of such a component, designed to meet the demanding requirements of heavy-duty truck operations.

Basic Concepts

A studded flange cap screw is a type of fastener that includes a threaded shank and a flanged head. The flange provides a larger surface area for distribution of clamping force, which helps in securing components more effectively. This screw type is particularly useful in applications where vibration and dynamic loads are common, as the flange helps to resist loosening. Within a truck’s mechanical system, these screws play a role in securing critical components, ensuring that parts remain firmly in place under various operating conditions ¹.

Purpose and Function

The 4078617 Studded Flange Cap Screw by Cummins is specifically designed to secure components in truck operations. Its primary function is to provide a reliable fastening solution that ensures structural integrity. By securing parts such as engine components, transmission parts, and chassis elements, this screw helps maintain the overall stability and performance of the truck. The flanged design enhances the screw’s ability to withstand the rigors of heavy-duty use, making it a valuable component in truck maintenance and repair ².

Key Features

The 4078617 Studded Flange Cap Screw boasts several key features that enhance its performance and durability. It is constructed from high-strength materials, ensuring it can withstand significant stress and strain. The threading type is designed to provide a secure fit, reducing the likelihood of loosening over time. Additionally, the screw’s design specifications include a flange that distributes clamping force more effectively, further enhancing its reliability in demanding applications ³.

Benefits

Using the 4078617 Studded Flange Cap Screw offers several advantages. Its robust construction and design contribute to improved reliability, ensuring that fastened components remain secure under various operating conditions. The screw’s ease of installation is another benefit, as its design allows for quick and efficient fastening. Moreover, the maintenance benefits are notable, as the screw’s durable construction reduces the need for frequent replacements, contributing to lower overall maintenance costs.

Troubleshooting and Maintenance

Common issues associated with studded flange cap screws include loosening due to vibration and corrosion over time. To troubleshoot these problems, regular inspections are recommended to ensure that screws remain tight and free from corrosion. Maintenance practices such as applying an anti-seize compound can help prevent corrosion and make future removal easier. Additionally, replacing screws that show signs of wear or damage is crucial for maintaining optimal performance and safety ⁴.

Compatibility with Cummins Engines

The Studded Flange Cap Screw 4078617, manufactured by Cummins, is a critical component used in various engine assemblies. This part is designed to secure flanges and other components, ensuring a tight and reliable connection. Below is a detailed look at how this part fits with different Cummins engines.

B5.6 CM2670 Series

• B5.6 CM2670 B152B
• B6.7 CM2670 B153B

These engines utilize the Studded Flange Cap Screw 4078617 in several applications, particularly for securing flanges in the exhaust system and other critical areas.

D4.0 and F Series

• D4.0 CM2620 D103B
• F3.8 CM2620 F137B
• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

The Flange Cap Screw 4078617 is integral to these engines, providing the necessary fastening for various flanges, including those in the fuel system and turbocharger housings.

ISB Series

• ISB CM2150
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118

These engines incorporate the Studded Flange Cap Screw 4078617 in multiple locations, such as securing the cylinder head covers and other critical components.

ISBE and ISC Series

• ISBE CM2150
• ISBE4 CM850
• ISC CM2150
• ISC CM850
• ISC8.3 CM2250

The 4078617 part is used extensively in these engines, particularly for securing the intake manifold and other components that require a robust fastening solution.

ISL Series

• ISL CM2150
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250
• ISL9.5 CM2880 L138

These engines utilize the Studded Flange Cap Screw 4078617 for securing various flanges and covers, ensuring the integrity of the engine’s structure.

ISX Series

• ISX CM871
• ISX12 CM2350 X102
• ISX12 G CM2180 EJ

The ISX series engines also rely on the 4078617 part for securing critical components, including those in the exhaust and turbocharger systems.

Role of Part 4078617 Studded Flange Cap Screw in Engine Systems

The Part 4078617 Studded Flange Cap Screw is integral to the secure assembly and operation of various engine components. It ensures robust connections and maintains the integrity of the engine system under dynamic conditions.

Accessory Drive Shaft

In the accessory drive shaft arrangement, the Studded Flange Cap Screw secures the shaft to the engine block or other mounting points. This ensures that the drive shaft remains aligned and operates smoothly, transferring power to accessories like the alternator and water pump.

Actuator Housing

For the actuator housing, particularly in systems involving exhaust recirculation or other control mechanisms, the screw provides a firm attachment to the engine or chassis. This stability is essential for the precise operation of the actuator, which relies on consistent positioning and minimal movement.

Lifting and Breather Arrangements

In lifting arrangements, the Studded Flange Cap Screw is used to attach lifting brackets securely to the engine block. This is vital for safe engine removal and installation during maintenance or repair. In crankcase breather systems, it ensures that the breather cover is tightly sealed, preventing oil leaks and maintaining proper ventilation of the crankcase.

Compressor Systems

For both air and refrigerant compressors, the screw plays a role in securing the compressor housing to the engine or frame. This is important for maintaining the structural integrity of the compressor and ensuring it operates within specified parameters.

Hand Hole and Doser Fluid Cover

The screw is also used to secure hand hole covers, providing safe access points for maintenance without compromising the engine’s seal. In doser fluid systems, it ensures that the fluid cover is properly sealed, preventing leaks and contamination.

Gauge and Harness Attachments

In applications involving oil level gauges and electronic control module wiring harnesses, the Studded Flange Cap Screw ensures these components are firmly attached. This is important for accurate readings and reliable electrical connections.

Housing and Manifold Attachments

For flywheel housing, thermostat housing, and air intake manifolds, the screw provides a secure attachment to the engine block. This is essential for maintaining the structural integrity of these components and ensuring they function correctly.

Plumbing and Pump Systems

In various plumbing arrangements, such as crankcase breather, fuel lines, fuel drain, and turbocharger systems, the screw ensures that all connections are tight and secure. This is vital for maintaining system pressure, preventing leaks, and ensuring efficient operation of pumps and turbochargers.

Recirculation and Turbocharger Systems

In exhaust recirculation and turbocharger systems, the screw secures components like the recirculation valve and turbocharger housing. This ensures that these systems operate efficiently and contribute to the overall performance and emissions control of the engine.

Conclusion

The 4078617 Studded Flange Cap Screw by Cummins is a critical component in the assembly and maintenance of heavy-duty truck engines. Its robust design, ease of installation, and compatibility with various Cummins engine models make it an invaluable part for ensuring the structural integrity and performance of truck engines. Regular maintenance and proper use of this part contribute to the reliability and efficiency of truck operations.