168306
Slotted Set Screw
Cummins®

The Slotted Set Screw, Part #168306, is a fastener produced by Cummins. This article provides an overview of the Slotted Set Screw, its function, key features, benefits, and maintenance suggestions.

Basic Concepts of Slotted Set Screws

A slotted set screw is a type of fastener used to secure an object within or against another object. It features a slot in the head, allowing it to be tightened or loosened with a standard screwdriver. Slotted set screws are commonly used in applications where vibration resistance and secure fastening are required ¹.

Function of the 168306 Slotted Set Screw in Trucks

The 168306 Slotted Set Screw by Cummins is designed to secure components within the truck’s assembly. It ensures that parts remain fixed in place, reducing the risk of loosening due to vibrations commonly experienced in heavy-duty truck operations ².

Key Features

• Material: Typically made from high-tensile steel to provide durability and strength.
• Design: Features a hexagonal socket in the head for secure tightening.
• Thread Type: Usually has a fine or coarse thread depending on the application requirements.
• Length and Diameter: Available in various sizes to accommodate different fastening needs.

Benefits

• Vibration Resistance: The design helps in maintaining a secure fit even under vibrational stress.
• Easy Installation and Removal: The slotted head allows for straightforward installation and removal using common tools.
• Versatility: Suitable for a wide range of applications within the truck’s mechanical systems.

Troubleshooting and Maintenance

• Inspection: Regularly check for signs of wear or damage.
• Tightening: Ensure the screw is properly tightened to maintain secure fastening.
• Replacement: If corrosion or significant wear is observed, replace the screw to prevent failure.
• Lubrication: In some applications, a small amount of lubricant may be applied to reduce friction and ease of tightening.

Compatibility with Cummins Engines

This Cummins part is designed to fit a wide range of Cummins engines, ensuring compatibility and reliability in various applications.

G855 Series Engines

• G855
• G855 CM558

GTA38 Series Engines

• GTA38 G CMEICS G116C
• GTA855 CM558 (CM2358) G101

K Series Engines

• K19
• K38
• K50
• KTA19GC
• KTA19GC CM558
• KTA38GC CM558

L10 Series Engines

• L10 CELECT
• L10 GAS
• L10 MECHANICAL

N14 Series Engines

• N14 CELECT
• N14 G
• N14 MECHANICAL

NH/NT 855 Series Engines

• NH/NT 855

QSK19 Series Engines

• QSK19 CM2350 K105
• QSK19 CM2350 K114
• QSK19 CM2350 K144G
• QSK19 CM500
• QSK19 CM850 MCRS

QSK38 Series Engines

• QSK38 CM2150 MCRS
• QSK38 CM850 MCRS

QSK50 Series Engines

• QSK50 CM2150 K107

Role of Part 168306 Slotted Set Screw in Engine Systems

In the intricate assembly of engine systems, the 168306 plays a pivotal role in ensuring the secure attachment and alignment of various critical parts.

Integration with Base and Block Components

This part is instrumental in affixing base parts to the engine block, ensuring stability under operational stresses and precise alignment of components like the cylinder and camshaft ³.

Application in the EBM-Lever and Rocker Mechanisms

It is used to fasten components such as the engine brake, exhaust brake, and the fuel pump calibration system, ensuring accurate and reliable operation.

Role in the Fuel Rocker and Injector Assemblies

The Slotted Set Screw secures the fuel rocker in place, ensuring consistent fuel delivery, and maintains the integrity of the injector’s position for precise fuel injection.

Usage in the Cylinder Head and Rocker Housing

It is employed to secure the head to the block, ensuring a tight seal and preventing leaks. It also holds the rocker lever housing in place, maintaining the correct operation of the rocker exhaust lever and the rocker exhaust transfer lever.

Application in Performance and Ratio Conversion Kits

For performance parts and kits, such as the RKR Lever Ratio Conversion Kit, the Slotted Set Screw secures components like the rocker lever and the RUR (Rocker Under Ratio) mechanism, ensuring effective implementation and maintenance of performance enhancements.

Role in Engine Bracing and Spare Parts

The Slotted Set Screw provides additional structural support to the engine in the HSG Engine Brace and ensures that replacement parts are securely fitted in sets of spares, maintaining the engine’s operational integrity.

Conclusion

The 168306 Slotted Set Screw is a versatile and essential component in engine systems, playing a key role in the secure assembly and reliable operation of various engine parts. Its compatibility with a wide range of Cummins engines and its critical function in maintaining the integrity and performance of engine components make it an indispensable part in heavy-duty truck and engine applications.