3919736
Belt Tensioner Bracket
Cummins®

Introduction

The Belt Tensioner Bracket 3919736, manufactured by Cummins, is a critical component in the commercial truck industry. This part ensures the efficient operation of drive belts, which are essential for the functioning of various engine components such as alternators, water pumps, and air conditioning compressors. Understanding its design, purpose, and benefits can enhance maintenance practices and overall vehicle performance.

Basic Concepts

Belt tensioner brackets are designed to maintain the correct tension in drive belts, which is vital for the operation of engine components. Proper tension ensures efficient belt operation, reducing the risk of slippage, wear, and potential failure. The Belt Tensioner Bracket 3919736 is engineered to provide consistent tension, supporting the reliable performance of the drive belt system ¹.

Purpose and Role

The Belt Tensioner Bracket 3919736 ensures that drive belts remain under the correct amount of tension, which is necessary for the optimal performance of engine-driven accessories. By maintaining proper belt tension, this Cummins part helps reduce belt wear, enhance power transmission efficiency, and ensure that engine components operate smoothly and reliably.

Key Features

The Belt Tensioner Bracket 3919736 is constructed from high-quality materials to withstand the rigors of commercial truck operations. Its precise engineering ensures accurate tension maintenance, while its design allows for easy installation and compatibility with Cummins engines. These features contribute to the bracket’s reliability and effectiveness in supporting the drive belt system ².

Benefits

Utilizing the Belt Tensioner Bracket 3919736 offers several benefits. Improved belt longevity is one of the primary advantages, as consistent tension reduces wear and tear on the belts. Enhanced engine efficiency is another benefit, as properly tensioned belts ensure that engine-driven accessories operate at their intended performance levels. Additionally, the use of this bracket can lead to reduced maintenance requirements, as it helps prevent issues related to belt slippage and failure.

Installation Considerations

Proper installation of the Belt Tensioner Bracket 3919736 is crucial for its effective operation. It is important to align the bracket correctly with the engine components to ensure that the drive belts are tensioned appropriately. Following the manufacturer’s torque specifications during installation helps in securing the bracket firmly in place, which is essential for maintaining consistent belt tension. Compatibility with existing components should also be verified to ensure a seamless integration into the truck’s engine system.

Troubleshooting and Maintenance

Regular inspection and maintenance of the Belt Tensioner Bracket 3919736 are recommended to ensure its continued optimal performance. Common issues such as belt slippage or unusual noises can often be traced back to problems with the tensioner bracket. Troubleshooting may involve checking the alignment and tension of the belts, as well as inspecting the bracket for signs of wear or damage. Routine maintenance, including lubrication of moving parts and verification of tension settings, can help in preventing issues and ensuring the longevity of the bracket and the drive belt system ³.

Cummins Overview

Cummins is a renowned manufacturer in the commercial truck industry, known for its high-quality engines and components. With a rich history of innovation and excellence, Cummins offers a wide range of products designed to meet the demanding requirements of commercial trucking. The company’s reputation for reliability and performance makes its components, like the Belt Tensioner Bracket 3919736, a preferred choice for truck operators and maintenance professionals.

Compatibility with Cummins Engines

The Belt Tensioner Bracket 3919736 is designed to fit a variety of Cummins engines. This bracket plays a crucial role in maintaining the proper tension of the engine’s serpentine belt, ensuring efficient power transmission and optimal performance of engine accessories.

Compatible Engines

• 4B3.9
• 6B5.9
• B3.9 G
• B4.5
• B5.9 G
• B5.9 GAS PLUS CM556
• G5.9
• G5.9 CM558
• ISB CM550
• QSB5.9 44 CM550

The Belt Tensioner Bracket 3919736 is engineered to fit seamlessly with these engines, providing a reliable solution for maintaining belt tension across different engine configurations. This compatibility ensures that the bracket can be used across a range of applications without requiring specific modifications, making it a versatile choice for maintenance and repair.

Interaction with Key Components

The Belt Tensioner Bracket, identified by part number 3919736, is integral to the proper functioning of various engine components. This bracket securely mounts the tensioner, which is responsible for maintaining the correct tension on the drive belt.

1. Alternator Drive: The Belt Tensioner Bracket ensures that the drive belt remains properly tensioned as it wraps around the alternator pulley. This tension is vital for the alternator to generate electricity efficiently, which is essential for powering the vehicle’s electrical systems and recharging the battery.

2. Water Pump Drive: Similarly, the bracket plays a role in keeping the belt taut around the water pump pulley. Proper belt tension ensures that the water pump operates effectively, circulating coolant through the engine to prevent overheating.

3. Tensioner: The bracket provides a stable mounting point for the tensioner mechanism. The tensioner automatically adjusts the belt tension as the engine operates, compensating for belt stretch and wear, thereby ensuring consistent performance of all driven components.

4. Pulleys: By maintaining optimal belt tension, the bracket indirectly supports the function of all pulleys in the system, including those for the alternator, water pump, and other auxiliary components. This ensures smooth operation and reduces the risk of belt slippage or failure.

Conclusion

The Belt Tensioner Bracket 3919736 is a foundational component that supports the reliable operation of the drive belt system, impacting the performance of the alternator, water pump, and other engine-driven accessories. Its design, purpose, and benefits make it an essential part for maintaining the efficiency and reliability of commercial truck engines.