206354
Head Locking Screw
Cummins®

Introduction

The Head Locking Screw 206354, a component manufactured by Cummins, is crucial for securing the cylinder head to the engine block in heavy-duty trucks. Its design and function are integral to maintaining the structural integrity and operational efficiency of the engine ².

Basic Concepts of Head Locking Screws

Head locking screws are essential fasteners in internal combustion engines, securing the cylinder head to the engine block. They operate under high pressure and temperature conditions, ensuring a tight seal between the head and block. This seal is vital for maintaining compression within the cylinders, which is necessary for efficient combustion ¹. The screws must withstand significant stress and thermal expansion, making their material and design critical for engine performance.

Role of the 206354 Head Locking Screw in Truck Operation

This Cummins part contributes to the engine assembly by providing a secure attachment point for the cylinder head. This attachment is crucial for maintaining the engine’s structural integrity under the high pressures and temperatures generated during operation. By ensuring a tight seal, the screw helps in preserving the compression within the cylinders, which is fundamental for the engine’s combustion process and overall performance ².

Key Features

The 206354 is engineered with specific features to enhance its functionality and durability. It is made from high-strength materials that can withstand the extreme conditions within an engine. The design includes precise threading and a robust head configuration to ensure secure fastening. Additionally, the screw may feature coatings or treatments to resist corrosion and wear, further enhancing its longevity in the demanding environment of a heavy-duty truck engine ³.

Benefits

Utilizing this part offers several advantages. Its high-strength material composition and precise design contribute to improved engine performance by ensuring a reliable seal between the cylinder head and engine block. This reliability enhances the durability and efficiency of the engine, reducing the likelihood of leaks or failures. Furthermore, the screw’s resistance to corrosion and wear supports its longevity, providing a dependable component for heavy-duty applications ².

Troubleshooting and Maintenance

Common issues with head locking screws include loosening over time due to engine vibrations and thermal cycling, or corrosion that can compromise their integrity. Regular inspection and maintenance are recommended to ensure the screws remain in optimal condition. This may involve checking for signs of wear or corrosion, ensuring proper torque during reinstallation, and replacing screws that show signs of damage or excessive wear. Adhering to manufacturer guidelines for maintenance can help in preserving the effectiveness and longevity of the 206354 ¹.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines, as well as related technologies. With a history spanning over a century, Cummins has established itself as a pioneer in engine technology, committed to innovation, quality, and customer satisfaction. The company’s expertise in diesel engine manufacturing is evident in its comprehensive range of components, including the 206354, designed to meet the rigorous demands of heavy-duty applications ².

Compatibility with Cummins Engines

This part is designed to be compatible with a variety of Cummins engines, each engineered for specific applications and performance characteristics.

G855 Series

• G855
• G855 CM558
• GTA855 CM558 (CM2358) G101

K19 Series

• K19
• QSK19 CM2350 K105
• QSK19 CM2350 K114
• QSK19 CM500
• QSK19 CM850 MCRS

N14 Series

• N14 CELECT
• N14 CELECT PLUS
• N14 G
• N14 MECHANICAL

NH/NT 855

• NH/NT 855

QSN14 Series

• QSN14 CM876 N103

V903 and VTA903 Series

• V903
• VTA903 CM2250 V105

Role in Engine Systems

The 206354 is instrumental in ensuring the secure assembly and operation of various engine components. It is used in fastening the compressor head in air compressors, securing the flange to the crankshaft in crank flange & pulley mounting, and attaching the damper to the pulley in damper and pulley assemblies. Additionally, it plays a critical role in securing the vibration damper to the crankshaft or flywheel, contributing to the overall stability and balance of the engine within its mounting framework ³.

Conclusion

The 206354 Head Locking Screw by Cummins is a vital component in the assembly and operation of heavy-duty diesel engines. Its high-strength design, precise engineering, and compatibility with various Cummins engines make it an essential part for maintaining engine performance, durability, and efficiency. Regular maintenance and adherence to manufacturer guidelines are crucial for ensuring the longevity and reliability of this part in demanding applications.