3910739
Ball Bearing
Cummins®

Introduction

Ball bearings are essential components in the mechanical systems of commercial trucks, facilitating smooth operation and efficiency. Among the various models available, the 3910739 ball bearing produced by Cummins is particularly significant. This bearing is designed to meet the demanding requirements of heavy-duty applications, contributing to the reliable performance of commercial trucks.

Basic Concepts of Ball Bearings

Ball bearings are mechanical components used to reduce friction between moving parts. They consist of an inner ring, an outer ring, rolling elements (balls), and a cage that keeps the balls evenly spaced. When one ring rotates, the balls roll between the rings, minimizing friction and allowing for smooth motion. Ball bearings are widely used in various mechanical systems due to their efficiency and durability ¹.

Role of 3910739 Ball Bearing in Truck Operation

The 3910739 ball bearing plays a specific role within the operation of a commercial truck. It is commonly used in applications such as wheel hubs, transmission systems, and other rotating assemblies. By reducing friction in these systems, the bearing contributes to the overall performance and efficiency of the vehicle. Its design allows for high-speed operation and supports significant loads, which are typical in heavy-duty truck applications ².

Key Features

The 3910739 ball bearing is characterized by several key features that make it suitable for demanding applications. Its design includes precision-machined rings and high-quality steel balls, ensuring smooth operation and durability. The bearing is engineered to handle substantial radial and axial loads, making it ideal for heavy-duty use. Additionally, the use of a robust cage material enhances its performance under high-stress conditions.

Benefits

Using the 3910739 ball bearing in commercial trucks offers several benefits. It provides improved efficiency by reducing friction in rotating assemblies, which can lead to enhanced fuel economy. The bearing’s durable construction ensures long service life, reducing the need for frequent replacements. Moreover, its reliable performance contributes to the overall safety and efficiency of the truck, potentially leading to cost savings over time ³.

Troubleshooting and Maintenance

Common issues with ball bearings, including the 3910739 model, may include noise, vibration, or reduced performance. These issues can often be traced to contamination, improper lubrication, or excessive load. Regular maintenance practices, such as checking for proper lubrication, inspecting for signs of wear, and ensuring correct installation, can help prevent these issues. Additionally, following the manufacturer’s guidelines for maintenance intervals can ensure the longevity and optimal performance of the ball bearing.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history in the automotive industry, Cummins is renowned for its commitment to producing high-quality components for commercial vehicles. The company’s expertise in engine and component design ensures that its products, including the 3910739 ball bearing, meet the rigorous demands of heavy-duty applications.

Compatibility with Cummins Engines

The Ball Bearing part number 3910739, manufactured by Cummins, is compatible with various engine models. This bearing is designed to facilitate smooth rotational motion and reduce friction, ensuring optimal engine performance and longevity. Below is a detailed breakdown of the engines with which this bearing is compatible:

4B3.9 and 6B5.9 Engines

The Ball Bearing 3910739 is compatible with the 4B3.9 and 6B5.9 engines. These engines are known for their robust design and reliability, often used in heavy-duty applications. The bearing ensures that the rotational components within these engines operate smoothly, minimizing wear and tear.

B4.5 Series Engines

The Ball Bearing 3910739 fits the B4.5, B4.5 CM2350 B129B, and B4.5 RGT engines. These engines are typically used in a variety of applications, from agricultural to industrial use. The bearing’s precision engineering ensures that the rotational parts function seamlessly, contributing to the engine’s overall efficiency.

B5.6 and B5.9 Series Engines

This bearing is also compatible with the B5.6 CM2670 B152B, B5.9 CM2670 B166C, B5.9 G, B5.9 GAS PLUS CM556, and B5.9 engines. These engines are known for their versatility and performance in demanding environments. The Ball Bearing 3910739 plays a role in maintaining the smooth operation of the engine’s rotating assemblies.

B6.7 Series Engines

The Ball Bearing 3910739 is suitable for the B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 CM2670 B164C, B6.7 G CMOH6.0 B125, B6.7S, and B6.7 engines. These engines are widely used in various sectors due to their durability and efficiency. The bearing ensures that the engine’s rotating components function without excessive friction, enhancing the engine’s lifespan and performance.

C Series Engines

The Ball Bearing 3910739 is also compatible with the C GAS PLUS CM556 and C8.3 G engines. These engines are designed for high-performance applications, and the bearing’s precision ensures that the rotating parts operate smoothly, contributing to the engine’s overall reliability.

D4.0 and F Series Engines

Finally, the Ball Bearing 3910739 fits the D4.0 CM2620 D103B, F2.8 CM2620 F135B, F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102, F4.5 CM2620 F139B, and F4.5 CM2620 F141C engines. These engines are used in a variety of applications, from construction to transportation. The bearing ensures that the engine’s rotating components operate with minimal friction, enhancing the engine’s efficiency and longevity.

Role of Part 3910739 Ball Bearing in Engine Systems

The 3910739 Ball Bearing is integral to the smooth operation of various engine components. It facilitates efficient power transmission and reduces friction in the following systems:

Accessory Drive Pulley

In the accessory drive pulley system, the 3910739 Ball Bearing ensures that the pulley rotates with minimal resistance. This allows for consistent power transfer to accessories such as the alternator and water pump, enhancing their performance and longevity.

Alternator Drive

For the alternator drive mechanism, the 3910739 Ball Bearing plays a significant role in maintaining the rotational efficiency of the alternator. This ensures stable electrical output, which is essential for powering the vehicle’s electrical systems and recharging the battery.

Alternator Mounting

When integrated into the alternator mounting system, the 3910739 Ball Bearing helps in securing the alternator in place while allowing it to spin freely. This reduces wear on the mounting brackets and enhances the overall stability of the alternator.

Fan Drive

In the fan drive system, the 3910739 Ball Bearing contributes to the efficient operation of the engine cooling fan. By minimizing friction, it ensures that the fan can operate at optimal speeds, providing adequate cooling to the engine.

Fan Drive Mounting

For the fan drive mounting, the 3910739 Ball Bearing ensures that the fan drive mechanism is securely mounted while allowing for smooth rotation. This is vital for maintaining the structural integrity of the fan drive system and ensuring consistent cooling performance.

Fan Hub Kit

Within the fan hub kit, the 3910739 Ball Bearing enables the fan hub to rotate with minimal friction. This is essential for the efficient operation of the cooling fan, which helps in maintaining the engine’s optimal temperature.

Fan Pulley

In the fan pulley system, the 3910739 Ball Bearing ensures that the pulley can spin freely and efficiently. This is important for the proper functioning of the fan, which relies on the pulley to transfer power from the engine to the fan blades.

Fan Support

The 3910739 Ball Bearing, when used in the fan support system, helps in maintaining the structural integrity of the fan while allowing it to rotate smoothly. This is crucial for the effective operation of the engine’s cooling system.

Refrigerant Compressor Drive

In the refrigerant compressor drive system, the 3910739 Ball Bearing ensures that the compressor can operate efficiently. This is vital for the proper functioning of the vehicle’s air conditioning system, which relies on the compressor to circulate refrigerant.

Water Pump Drive

Finally, in the water pump drive system, the 3910739 Ball Bearing ensures that the water pump can rotate with minimal friction. This is essential for the efficient circulation of coolant through the engine, which helps in maintaining its optimal temperature and preventing overheating.

Conclusion

The 3910739 Ball Bearing by Cummins is a critical component in the mechanical systems of commercial trucks and various engine models. Its design and features make it suitable for heavy-duty applications, contributing to the efficient and reliable operation of the vehicle. Regular maintenance and proper installation are essential to ensure the longevity and optimal performance of this Cummins part.