3904950
Belt Tensioner Bracket
Cummins®

The Belt Tensioner Bracket 3904950 by Cummins is a component designed to support the proper functioning of belts within the engine system of commercial trucks. Its role is to maintain the correct tension on the belts, ensuring efficient operation of the engine’s accessory drive system ³.

Basic Concepts of Belt Tensioner Brackets

A Belt Tensioner Bracket is a part of the engine system that holds the belt tensioner in place. It functions by providing a stable mounting point for the tensioner, which in turn keeps the belt at the optimal tension. This is important for the smooth and efficient operation of the engine’s accessory drive system, which includes components such as the alternator, water pump, and air conditioning compressor ¹.

Purpose of the 3904950 Belt Tensioner Bracket

The 3904950 Belt Tensioner Bracket is specifically designed to support the belt tensioner in the engine’s accessory drive system of a truck. It ensures that the belt remains at the correct tension, which is necessary for the efficient transfer of power to the engine’s accessories. This part plays a role in maintaining the reliability and performance of the accessory drive system by ensuring that the belt does not slip or become too loose ².

Key Features

The 3904950 Belt Tensioner Bracket is constructed from durable materials to withstand the rigors of commercial truck operation. Its design includes features that enhance its performance, such as precise mounting points for the tensioner and a robust structure that can handle the dynamic forces exerted by the belt. These features contribute to the bracket’s ability to maintain proper belt tension under various operating conditions ³.

Benefits

The use of the 3904950 Belt Tensioner Bracket can lead to improved engine efficiency, as it helps to ensure that the belt operates within the optimal tension range. This can result in reduced wear on the belts and accessories, leading to longer service intervals and lower maintenance costs. Additionally, the reliable performance of the accessory drive system contributes to the overall dependability of the truck ¹.

Installation Process

Installing the 3904950 Belt Tensioner Bracket requires careful attention to ensure proper fitting and function. The process involves securing the bracket to the engine block using the appropriate fasteners, aligning it with the tensioner, and ensuring that it is properly torqued. Following the manufacturer’s instructions for installation is important to achieve the correct tension and avoid potential issues ².

Troubleshooting Common Issues

Common problems associated with Belt Tensioner Brackets can include noise, vibration, or belt slippage. These issues may arise from improper installation, wear, or damage to the bracket or tensioner. Troubleshooting steps may involve inspecting the bracket and tensioner for signs of wear, ensuring that the bracket is securely mounted, and checking the belt tension to confirm that it is within the specified range ³.

Maintenance Tips

Regular maintenance of the 3904950 Belt Tensioner Bracket is important to ensure its longevity and optimal performance. This includes periodic inspection for signs of wear or damage, ensuring that the bracket remains securely mounted, and checking the belt tension to confirm that it is within the manufacturer’s specifications. Addressing any issues promptly can help to prevent more serious problems down the line ¹.

Compatibility and Applications

The 3904950 Belt Tensioner Bracket is designed for use in a variety of commercial truck applications. Its versatility allows it to be used across different truck models and engine types, making it a valuable component in the maintenance and repair of commercial vehicles ².

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a strong reputation in the commercial truck industry, Cummins is known for its high-quality and reliable products. The 3904950 Belt Tensioner Bracket is part of Cummins’ extensive range of components designed to enhance the performance and reliability of commercial trucks ³.

Belt Tensioner Bracket 3904950 Compatibility with Cummins Engines

The Belt Tensioner Bracket part number 3904950, manufactured by Cummins, is designed to fit seamlessly with several engine models. This bracket plays a role in maintaining the proper tension of the engine’s serpentine belt, ensuring efficient operation and longevity of the belt and associated components ¹.

6C8.3 Engine

The 6C8.3 engine is one of the models that benefit from the precise fit and functionality of the 3904950 Belt Tensioner Bracket. This engine is known for its robust performance and reliability, often used in heavy-duty applications. The bracket’s design ensures that it aligns perfectly with the engine’s layout, providing the necessary support and tension to the belt system ².

Grouping of Compatible Engines

While the 6C8.3 is a notable example, the 3904950 Belt Tensioner Bracket is engineered to be compatible with a range of Cummins engines. This compatibility extends to other models within the same engine family, where similar design and engineering principles are applied. The bracket’s universal fit across these engines underscores Cummins’ commitment to providing high-quality, interchangeable parts that enhance engine performance and durability ³.

Role of Part 3904950 Belt Tensioner Bracket in Engine Systems

The 3904950 Belt Tensioner Bracket is an integral component in maintaining the optimal performance of the drive system and ensuring the efficient operation of the alternator.

In the drive system, the Belt Tensioner Bracket secures the belt tensioner, which is responsible for maintaining the correct tension on the drive belt. Proper tension is essential for the smooth transfer of power from the engine to various components, such as the alternator, water pump, and air conditioning compressor. Without adequate tension, the belt may slip, leading to reduced efficiency and potential damage to the drive components ¹.

For the alternator, the Belt Tensioner Bracket plays a significant role in ensuring consistent power generation. The alternator relies on a steady and proper belt tension to spin its rotor and generate electricity. If the belt is too loose or too tight, it can affect the alternator’s ability to charge the battery effectively, leading to potential electrical issues within the vehicle ².

Overall, the 3904950 Belt Tensioner Bracket contributes to the reliability and efficiency of the engine system by ensuring that the drive belt maintains the correct tension, thereby supporting the seamless operation of connected components like the alternator ³.

Conclusion

The 3904950 Belt Tensioner Bracket by Cummins is a critical component for maintaining the efficiency and reliability of commercial truck engine systems. Its proper installation, maintenance, and compatibility with various Cummins engines ensure optimal performance of the accessory drive system, contributing to the overall dependability of the vehicle.