109558
Lock Nut
Cummins®

Introduction

The Cummins 109558 Lock Nut is a specialized component designed for use in commercial trucks. Its primary function is to secure various components, ensuring they remain firmly in place despite the dynamic forces encountered during operation. This lock nut is integral to maintaining the integrity and safety of truck systems by preventing unwanted loosening of fasteners.

Basic Concepts of Lock Nuts

Lock nuts, also known as prevailing torque nuts, are designed to resist loosening under vibration and dynamic loads. They achieve this through various mechanisms such as nylon inserts, deformed threads, or locking patches. In mechanical systems, lock nuts play a vital role in securing components that are subject to movement or vibration, thereby enhancing the reliability and safety of the system ¹.

Purpose of the Cummins 109558 Lock Nut

The Cummins 109558 Lock Nut is specifically engineered to address the challenges posed by the harsh operating conditions of commercial trucks. It secures components by creating a locking mechanism that resists loosening due to vibration or other dynamic forces. This ensures that critical parts remain tightly fastened, which is essential for the safe and efficient operation of the vehicle ².

Key Features

The Cummins 109558 Lock Nut boasts several key features that enhance its performance and reliability. Its design incorporates a nylon insert that provides a prevailing torque, which helps to keep the nut securely in place. The material composition is robust, ensuring durability under demanding conditions. Additionally, the nut is precision-engineered to meet the specific requirements of commercial truck applications ³.

Benefits

Utilizing the Cummins 109558 Lock Nut offers several advantages. It contributes to improved safety by ensuring that critical components remain securely fastened. The enhanced durability of the lock nut reduces the need for frequent replacements, leading to cost savings. Moreover, its design facilitates easier maintenance, as it simplifies the process of securing and adjusting components.

Installation Guidelines

Proper installation of the Cummins 109558 Lock Nut is crucial for optimal performance. Begin by ensuring the mating threads are clean and free of debris. Apply the appropriate torque specifications to tighten the nut, taking care not to over-tighten, which could damage the threads or the component being secured. Verify the nut is properly seated and that the locking mechanism is engaged.

Troubleshooting and Maintenance

Common issues with lock nuts include loosening due to inadequate torque or environmental factors. Regular inspection and maintenance are recommended to identify any signs of wear or damage. If loosening is detected, re-tighten the nut to the specified torque and ensure the locking mechanism is functioning correctly. In cases of significant wear, replacement may be necessary to maintain system integrity.

Compatibility and Application

The Cummins 109558 Lock Nut is designed for use in various commercial truck systems where secure fastening is required. It is compatible with a range of components and applications within these systems. When selecting a lock nut for a specific application, it is important to consider the environmental conditions, dynamic loads, and the specific requirements of the system.

Manufacturer Overview - Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history spanning over a century, Cummins has established a strong reputation for quality, reliability, and customer satisfaction in the commercial truck industry. Their product range includes a variety of components designed to enhance the performance and durability of commercial vehicles.

Cummins Lock Nut 109558 Compatibility

The Cummins Lock Nut 109558 is a critical component designed to ensure secure fastening in various engine applications. This part is compatible with a wide range of Cummins engines, providing reliability and durability across multiple models.

Compatible Engines

G-Series Engines

The Lock Nut 109558 is suitable for the following G-Series engines:

• G5.9
• G8.3
• G8.3 CM558
• G855

K-Series Engines

This lock nut also fits the following K-Series engines:

• K38
• K50

QSK-Series Engines

The Lock Nut 109558 is compatible with several QSK-Series engines, including:

• QSK38 CM2150 MCRS
• QSK38 CM850 MCRS
• QSK45 CM500
• QSK50 CM2150 MCRS
• QSK60 CM500

QSL-Series Engines

The following QSL-Series engines can utilize the Lock Nut 109558:

• QSL8.9 CM2150 L141
• QSL9 CM850 (CM2850)
• QSL9 G CM558

QSN-Series Engines

The Lock Nut 109558 is also suitable for the QSN-Series engines:

• QSNT14 CM876 N102

Other Series Engines

Additionally, this lock nut fits the following engines:

• 4B3.9
• 6C8.3
• KTA19GC
• KTA19GC CM558
• L10 GAS
• N14 G
• NH/NT 855
• QSB4.5 CM850 (CM2850)
• V28

This compatibility ensures that the Lock Nut 109558 can be used across a broad spectrum of Cummins engines, providing a reliable fastening solution for various applications.

Role of Part 109558 Lock Nut in Engine Systems

The Part 109558 Lock Nut is an essential component utilized across various engine systems to ensure secure fastening and reliable operation. Its applications span multiple critical areas within the engine, contributing to the overall efficiency and safety of the system.

Actuator Assembly

In the actuator assembly, the lock nut is employed to secure the actuator to its mounting points. This ensures that the actuator remains firmly in place, allowing for precise control of engine functions such as valve timing and fuel injection.

Air Cleaner Systems

For the air cleaner bracket mounting and air cleaner mounting, the lock nut plays a vital role in maintaining the integrity of the air intake system. By securely fastening the air cleaner components, it ensures that the engine receives a consistent airflow, which is essential for optimal combustion and performance.

Air Intake and Intercooler

Within the air intake intercooler system, the lock nut is used to fasten the intercooler to the manifold and other components. This secure attachment is necessary to prevent leaks and ensure that the air entering the engine is properly cooled, enhancing engine efficiency and power output.

Belt Guard and Engine Cooling System

The belt guard, which protects the engine’s drive belts, utilizes lock nuts to maintain its position. Similarly, in the engine cooling system, lock nuts are employed to secure components such as the water pump and radiator hoses, ensuring a leak-free and efficient cooling process.

Turbo and Exhaust Brake Systems

In turbo applications, lock nuts are critical for securing the turbocharger to the engine and exhaust system. For the exhaust brake NTC350 and NTC400 kits, lock nuts ensure that the brake components are firmly attached, providing reliable engine braking performance.

Lubricating Oil Suction Tube and Manifold

The lubricating oil suction tube, which draws oil from the sump to the engine, relies on lock nuts to maintain a secure connection. Similarly, in the air intake manifold, lock nuts are used to ensure that the manifold is tightly sealed to the engine, preventing air leaks that could affect engine performance.

Engine Control Module and Oil Filter/Cooler

The engine control module (ECM) mounting often involves lock nuts to ensure that the ECM remains securely in place, unaffected by engine vibrations. For the oil filter and cooler, lock nuts are used to maintain a tight seal, ensuring efficient oil filtration and cooling.

Pressure Regulator Valve

In systems involving a pressure regulator valve, such as the ether system or the oil replenishing system, lock nuts are utilized to secure the valve in place. This ensures consistent pressure regulation, which is vital for the proper functioning of these systems.

Front Engine Guard and Linkage

The front engine guard, designed to protect the engine from debris, uses lock nuts to ensure it remains securely attached. Additionally, in the linkage for governor control, lock nuts are essential for maintaining the precise mechanical connections necessary for accurate engine speed regulation.

Overhaul and Performance Kits

In overhaul kits and performance parts, lock nuts are frequently used to secure newly installed components, ensuring that they remain in place during engine operation. This is particularly important in high-performance applications where engine components are subjected to greater stresses.

Conclusion

The Cummins 109558 Lock Nut plays a significant role in ensuring the reliability and performance of various engine systems. Its versatile applications across different components contribute to the smooth, efficient, and safe operation of commercial trucks. Proper installation, regular maintenance, and understanding its compatibility with various Cummins engines are crucial for maximizing the benefits of this part.