4936440
Belt Tensioner
Cummins®

The Cummins 4936440 Belt Tensioner is a component designed to maintain the appropriate tension on drive belts within commercial truck engines. This part ensures the efficient operation of various engine-driven accessories, contributing to the overall performance and reliability of the vehicle.

Basic Concepts of Belt Tensioners

A belt tensioner is a device used in engine systems to keep drive belts at the correct tension. It operates by applying consistent pressure to the belt, which prevents slippage and ensures that power is effectively transmitted to components such as the alternator, water pump, and air conditioning compressor. Maintaining proper belt tension is important for the longevity of the belts and the efficient operation of the engine system ¹.

Purpose of the 4936440 Belt Tensioner

The Cummins 4936440 Belt Tensioner plays a role in the operation of a truck by maintaining the correct tension on drive belts. This ensures that the belts remain in optimal contact with the pulleys they drive, which is important for the efficient transfer of power and the smooth operation of engine accessories.

Key Features

The Cummins 4936440 Belt Tensioner is characterized by several design elements and materials that enhance its performance. It is constructed from durable materials to withstand the rigors of commercial truck operation. Unique characteristics may include a self-adjusting mechanism that maintains consistent belt tension under varying conditions ².

Benefits of Using the 4936440 Belt Tensioner

The Cummins 4936440 Belt Tensioner offers several advantages. It contributes to improved engine efficiency by ensuring that drive belts operate within their optimal tension range. This can lead to reduced wear on belts and enhanced reliability of the engine system. Additionally, proper belt tension can help prevent unexpected belt failures, which can be particularly important in the demanding environment of commercial trucking ³.

Installation Process

Installing the Cummins 4936440 Belt Tensioner involves several steps. The process typically requires specific tools and careful attention to detail to ensure proper setup. It is important to follow manufacturer guidelines for installation to avoid complications and ensure the tensioner functions correctly within the engine system.

Troubleshooting Common Issues

Common problems associated with belt tensioners can include noise from the tensioner area, belt slippage, or visible wear on the tensioner components. These issues may be caused by factors such as improper installation, wear and tear, or insufficient lubrication. Addressing these problems may involve inspecting the tensioner for signs of damage, ensuring it is correctly installed, or applying lubrication as recommended by the manufacturer.

Maintenance Tips

To ensure the optimal performance of the Cummins 4936440 Belt Tensioner, regular inspections are recommended. Signs of wear, such as cracks or excessive play in the tensioner arm, should be addressed promptly. Maintenance procedures may include cleaning the tensioner area, checking for proper belt tension, and ensuring that all components are securely fastened.

Compatibility and Applications

The Cummins 4936440 Belt Tensioner is designed to fit specific types of commercial trucks and engine models. It is important to consult the manufacturer’s guidelines for compatibility information to ensure the tensioner is suitable for the intended application.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established a reputation for quality and innovation in the commercial truck industry. The company offers a wide range of products designed to meet the needs of various applications, from on-highway to off-highway and industrial uses.

Belt Tensioner Part 4936440 in Cummins Engines

The Belt Tensioner part number 4936440, manufactured by Cummins, is a component in maintaining the functionality of the engine’s belt system. This part is designed to ensure that the engine’s belts are held at the correct tension, which is important for the proper operation of various engine accessories such as the alternator, water pump, and air conditioning compressor.

Compatibility with Cummins Engines

• ISB/ISD6.7 CM2150 SN: The Belt Tensioner part 4936440 is compatible with the ISB/ISD6.7 CM2150 SN engines. This part ensures that the serpentine belt in these engines maintains the correct tension, which is important for the efficient operation of the engine’s accessories.

• ISBE CM800 and ISBE4 CM850: The Belt Tensioner part 4936440 also fits the ISBE CM800 and ISBE4 CM850 engines. These engines, known for their robust performance, benefit from the precise tensioning provided by this part, ensuring that the engine’s belts operate smoothly and without slippage.

The Belt Tensioner part 4936440 is engineered to withstand the rigors of continuous engine operation, providing reliable performance and longevity. Its design ensures that the belt system remains in optimal condition, reducing the risk of belt failure and the associated downtime and repair costs.

Role of Part 4936440 Belt Tensioner in Engine Systems

The 4936440 Belt Tensioner is integral to maintaining the optimal performance of several key engine components.

Drive System

In the drive system, the 4936440 Belt Tensioner ensures that the drive belt is properly tensioned. This is important for the efficient transfer of power from the engine to various auxiliary components. Proper tensioning prevents slippage, which can lead to inefficient power transmission and increased wear on the belt. The tensioner automatically adjusts to maintain the correct tension, accommodating for belt stretch and wear over time.

Water Pump

For the water pump, the 4936440 Belt Tensioner plays a significant role in ensuring consistent operation. The water pump relies on a drive belt to rotate its impeller, which circulates coolant through the engine. If the belt is not properly tensioned, the water pump may not operate efficiently, leading to inadequate coolant flow. This can result in overheating and potential engine damage. The 4936440 Belt Tensioner maintains the necessary tension on the belt, ensuring the water pump functions correctly and the engine remains at an optimal operating temperature.

Conclusion

The Cummins 4936440 Belt Tensioner is a vital component in the maintenance and operation of commercial truck engines. By ensuring the correct tension on drive belts, this part contributes to the efficient operation of engine accessories, enhances engine reliability, and reduces the risk of belt failure. Regular maintenance and proper installation are key to maximizing the performance and longevity of this Cummins part.