4080398
Accessory Drive Pulley
Cummins®

Introduction

The Accessory Drive Pulley 4080398 is a component manufactured by Cummins, a well-established name in the commercial truck industry. This pulley is designed for use in commercial trucks, where it plays a significant role in the operation of the vehicle’s accessory drive system. Cummins is renowned for its high-quality engine components, and the Accessory Drive Pulley 4080398 is no exception, offering reliable performance and durability in demanding applications ⁴.

Basic Concepts

Accessory drive pulleys are integral to the engine’s accessory drive system. They function by interacting with belts to transfer power from the engine to various components such as the alternator, air conditioning compressor, and power steering pump. The efficiency and reliability of these pulleys are crucial for the proper operation of these accessories, ensuring that they receive the necessary power to function correctly ¹.

Purpose and Role

The Accessory Drive Pulley 4080398 is specifically designed to drive various components within a truck’s engine system. It is responsible for transferring power from the engine to accessories via a belt, ensuring that these components operate efficiently. This pulley contributes to the overall functionality of the vehicle by maintaining the proper operation of critical systems, such as electrical power generation and climate control ².

Key Features

The Accessory Drive Pulley 4080398 is constructed with high-quality materials to ensure durability and performance. Its design specifications are tailored to meet the demands of commercial truck applications, providing a balance of strength and efficiency. Unique attributes of this pulley may include precision machining for smooth operation, corrosion-resistant coatings for longevity, and a design that minimizes noise and vibration ³.

Benefits

Utilizing the Accessory Drive Pulley 4080398 offers several benefits. It enhances the efficiency of the accessory drive system by ensuring smooth and reliable power transfer. The pulley’s design and construction contribute to its reliability, reducing the likelihood of failure under stress. Additionally, its compatibility with Cummins engines ensures seamless integration and optimal performance within the engine system ⁴.

Installation and Compatibility

Proper installation of the Accessory Drive Pulley 4080398 is crucial for its performance and longevity. Installation guidelines should be followed to ensure the pulley is correctly aligned and secured. While specific compatibility information will be provided separately, it is important to note that this pulley is designed to work with certain Cummins engine models, ensuring a precise fit and function ¹.

Maintenance and Troubleshooting

To ensure the Accessory Drive Pulley 4080398 operates at its best, regular maintenance is recommended. This includes inspecting the pulley and associated belts for wear, ensuring proper alignment, and applying lubrication as necessary. Troubleshooting common issues such as belt slippage or pulley misalignment can often be addressed through adjustments or replacements, following manufacturer guidelines for best results ².

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a history spanning over a century, Cummins has established a strong reputation within the commercial truck industry for producing reliable and high-performance engines and components. Their product offerings extend beyond engines to include filtration, emissions, and powertrain technologies, all aimed at enhancing the efficiency and reliability of commercial vehicles ⁴.

Accessory Drive Pulley (Part 4080398) Compatibility with Cummins Engines

The Accessory Drive Pulley, identified by part number 4080398, is a critical component in the engine’s accessory drive system. This part is designed to work seamlessly with various Cummins engine models, ensuring efficient power transfer and reliable operation. Here is a detailed look at its compatibility across different engine series:

QSK45 CM500 and QSK60 CM500

The Accessory Drive Pulley (4080398) is compatible with both the QSK45 CM500 and QSK60 CM500 engines. These engines are part of Cummins’ QSK series, known for their robust design and high performance in marine and industrial applications. The pulley’s design ensures it can handle the specific demands of these engines, providing smooth and consistent operation of the engine’s accessories ⁴.

QSK60 CM850 MCRS and QSK60G

The Accessory Drive Pulley (4080398) also fits the QSK60 CM850 MCRS and QSK60G engines. These engines are part of the QSK60 series, which is designed for heavy-duty applications. The MCRS variant includes Marine Compliance Ready System, making it suitable for marine environments. The QSK60G is another variant optimized for specific industrial needs. The pulley’s compatibility with these engines ensures that it can manage the higher power outputs and operational stresses associated with these models ⁴.

QSK78 CM500

The Accessory Drive Pulley (4080398) is also suitable for the QSK78 CM500 engine. This engine is part of the QSK78 series, which is designed for high-power applications. The CM500 variant is tailored for specific industrial and marine applications. The pulley’s design ensures it can handle the unique demands of this engine, providing reliable power transfer to the engine’s accessories ⁴.

QSK95 CM2350 K111

Finally, the Accessory Drive Pulley (4080398) is compatible with the QSK95 CM2350 K111 engine. This engine is part of the QSK95 series, known for its high power output and efficiency. The CM2350 K111 variant is designed for heavy-duty industrial applications. The pulley’s compatibility with this engine ensures it can manage the high power and operational stresses, providing smooth and reliable operation of the engine’s accessories ⁴.

Accessory Drive Pulley Component Usage

The Accessory Drive Pulley, identified by part number 4080398, is an integral component within engine systems, facilitating the operation of various auxiliary systems that enhance engine performance and vehicle functionality.

Role in Engine Systems

1. Belt Drive System: The Accessory Drive Pulley is mounted on the crankshaft or a dedicated shaft and is engaged by a serpentine belt or V-belt. This pulley transmits rotational force from the engine to multiple accessories, ensuring they operate in sync with the engine’s speed ¹.

2. Alternator: Connected via the Accessory Drive Pulley, the alternator generates electrical power to charge the battery and supply electricity to the vehicle’s electrical systems. Efficient power transmission through the pulley ensures consistent electrical output ².

3. Power Steering Pump: The Accessory Drive Pulley drives the power steering pump, which provides hydraulic assistance for steering. Proper engagement and rotation through the pulley are essential for smooth and responsive steering ³.

4. Air Conditioning Compressor: In systems equipped with air conditioning, the Accessory Drive Pulley powers the compressor. This ensures the refrigerant is circulated and compressed, facilitating effective climate control within the vehicle ¹.

5. Water Pump: In some engine configurations, the Accessory Drive Pulley is responsible for driving the water pump. This ensures coolant circulation through the engine, maintaining optimal operating temperatures and preventing overheating ².

6. Other Auxiliary Systems: Additional components such as the fuel pump (in some designs), vacuum pump, and supercharger (if equipped) may also be driven by the Accessory Drive Pulley. Each of these systems relies on precise and consistent power transmission to function correctly ³.

The Accessory Drive Pulley’s role in coordinating these various components underscores its importance in maintaining overall engine efficiency and vehicle performance ⁴.

Conclusion

The Accessory Drive Pulley 4080398 by Cummins is a vital component in the accessory drive system of commercial trucks. Its high-quality construction, precise design, and compatibility with various Cummins engine models ensure reliable and efficient operation of the vehicle’s auxiliary systems. Proper installation, regular maintenance, and understanding its role within the engine system are essential for maximizing the performance and longevity of this Cummins part.