3967611
Accessory Drive Gear
Cummins®

Introduction

The Cummins 3967611 Accessory Drive Gear is a component designed for use in commercial trucks. It plays a role in the operation of these vehicles by facilitating the transfer of power from the engine to various accessories. This gear is integral to the efficient functioning of the truck’s engine system, ensuring that essential components receive the necessary power to operate correctly.

Basic Concepts of Accessory Drive Gear

An Accessory Drive Gear is a mechanical component that transmits rotational force from the engine to various accessories. Within an engine system, it interacts with components such as belts, pulleys, and the crankshaft to drive accessories like alternators, water pumps, and compressors. The gear’s design allows it to convert the engine’s rotational energy into the specific movements required by these accessories, ensuring they function as intended ¹.

Purpose of the Cummins 3967611 Accessory Drive Gear

The Cummins 3967611 Accessory Drive Gear is specifically designed to drive accessories within a truck’s engine system. Its role includes powering the alternator to generate electricity, the water pump to circulate coolant, and the compressor for air conditioning systems. By ensuring these accessories receive the necessary power, the gear contributes to the overall efficiency and reliability of the truck’s operation.

Key Features

The Cummins 3967611 Accessory Drive Gear is characterized by several key features that enhance its performance and durability. Its design incorporates precise engineering to ensure smooth operation and efficient power transfer. The gear is constructed from high-quality materials to withstand the demanding conditions of commercial truck engines. Additionally, it may feature unique characteristics such as specialized tooth profiles or coatings that reduce wear and improve longevity ².

Benefits

The Cummins 3967611 Accessory Drive Gear offers several benefits, including improved efficiency in power transmission, enhanced reliability under demanding conditions, and compatibility with Cummins engines. Its design and construction contribute to the overall performance of the truck, ensuring that accessories operate smoothly and efficiently. The gear’s compatibility with Cummins engines also ensures seamless integration into the engine system, maintaining the manufacturer’s standards for quality and performance.

Installation Considerations

Proper installation of the Cummins 3967611 Accessory Drive Gear is crucial for its effective operation. Guidelines for installation may include ensuring the engine is at the correct temperature, using the appropriate tools for tightening, and verifying that all connections are secure. Special tools or prerequisites may be required to ensure the gear is installed correctly and functions as intended within the engine system.

Troubleshooting Common Issues

Common issues with the Cummins 3967611 Accessory Drive Gear may include noise during operation, reduced efficiency in power transmission, or physical damage to the gear. Troubleshooting steps may involve inspecting the gear for signs of wear or damage, checking the alignment and tension of belts and pulleys, and ensuring that all connections are secure. Solutions may range from simple adjustments to replacement of the gear if significant damage is present.

Maintenance Tips

Regular maintenance of the Cummins 3967611 Accessory Drive Gear is important for ensuring optimal performance and longevity. Maintenance tips may include periodic inspection for signs of wear or damage, ensuring proper lubrication to reduce friction and wear, and following manufacturer recommendations for inspection intervals. Adhering to these maintenance practices can help prevent issues and ensure the gear continues to function efficiently.

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, reliability, and innovation in the commercial truck industry. The company’s commitment to excellence is reflected in its products, including the Cummins 3967611 Accessory Drive Gear, which is designed to meet the high standards of performance and durability expected by commercial truck operators ³.

Accessory Drive Gear 3967611 Compatibility with Cummins Engines

The Accessory Drive Gear 3967611, manufactured by Cummins, is designed to fit a variety of their engine models. This part plays a role in the engine’s operation by driving various accessories such as the alternator, water pump, and air conditioning compressor. Below is a detailed breakdown of the engines with which this part is compatible.

Cummins 4B3.9 Engines

The Accessory Drive Gear 3967611 is compatible with the Cummins 4B3.9 engines. This engine model is known for its robust performance and reliability, often used in various industrial and commercial applications.

Cummins 6B5.9 Engines

This part is also suitable for the Cummins 6B5.9 engines. The 6B5.9 is a high-performance engine, widely used in heavy-duty applications where durability and power are paramount.

Cummins 6C8.3 Engines

The Accessory Drive Gear 3967611 fits the Cummins 6C8.3 engines. These engines are recognized for their efficiency and are often used in applications requiring both power and fuel economy.

Cummins B5.6 CM2670 B152B Engines

The part is compatible with the Cummins B5.6 CM2670 B152B engines. These engines are engineered for specific applications where a balance of power and efficiency is needed.

Cummins B5.9 G and B5.9 GAS PLUS CM556 Engines

The Accessory Drive Gear 3967611 is designed to fit both the Cummins B5.9 G and B5.9 GAS PLUS CM556 engines. These engines are known for their versatility and are used in a variety of applications, from industrial to commercial.

Cummins ISB Engines

The part is compatible with several ISB engine models:

• ISB CM550
• ISB5.9 CM2880 B110
• ISB5.9 CM2880 B140
• ISB5.9 CM2880 B149
• ISB5.9G CM2180

These engines are known for their reliability and are widely used in various sectors, including transportation and construction.

Cummins QSB Engines

The Accessory Drive Gear 3967611 fits the following QSB engine models:

• QSB3.9 30 CM550
• QSB5.9 30 CM550
• QSB5.9 44 CM550

These engines are designed for applications requiring high power and efficiency, often found in agricultural and industrial settings.

Cummins QSC8.3 CM850 (CM2850) Engines

The part is also compatible with the Cummins QSC8.3 CM850 (CM2850) engines. These engines are known for their robust performance and are used in heavy-duty applications.

By ensuring compatibility with these various engine models, the Accessory Drive Gear 3967611 provides a reliable solution for maintaining the functionality of essential engine accessories across different Cummins engine types.

Role of Part 3967611 Accessory Drive Gear in Engine Systems

The Accessory Drive Gear, identified by part number 3967611, is integral to the efficient operation of various engine-driven components. This gear is responsible for transmitting rotational force from the engine to auxiliary systems, ensuring they function in harmony with the engine’s operation.

Integration with Air Compressor Systems

In air compressor and air compressor kit setups, the Accessory Drive Gear is a key component. It engages with the compressor’s drive mechanism, allowing the compressor to draw power directly from the engine. This direct power transfer is essential for the compressor to generate the necessary pressure for its operations, whether it’s for powering tools, inflating tires, or operating pneumatic systems.

Functionality in Compressor and Engine Installations

When considering compressor, air, and kit applications within an engine installation, the Accessory Drive Gear’s role becomes even more pronounced. It ensures that the compressor operates at the optimal speed and efficiency, directly influenced by the engine’s RPM. This gear’s precise engagement with the compressor’s drive system is what allows for the seamless integration of air compression needs within the engine’s operational parameters.

Enhancing Engine Performance and Reliability

The efficient operation of the Accessory Drive Gear within these systems not only enhances the performance of the air compressor but also contributes to the overall reliability and efficiency of the engine installation. By ensuring that auxiliary components like the air compressor receive consistent and adequate power, the gear plays a significant role in maintaining the balance and performance of the entire engine system.

Conclusion

The Cummins 3967611 Accessory Drive Gear is a critical component in the operation of commercial truck engines, ensuring the efficient transfer of power to essential accessories. Its design, compatibility with various Cummins engines, and role in enhancing engine performance and reliability make it a valuable part for maintaining the functionality and efficiency of truck engine systems.