4936007
Fan Clutch
Cummins®

Introduction

The Cummins 4936007 Fan Clutch is a component designed for use in the cooling systems of heavy-duty trucks. It is engineered to manage the operation of the cooling fan, which plays a role in maintaining optimal engine temperature. By regulating the fan’s speed in response to engine demands, the fan clutch contributes to efficient engine operation and helps in achieving better fuel economy ¹.

Basic Concepts of a Fan Clutch

A fan clutch is a device that connects the engine-driven water pump to the cooling fan. It operates by allowing the fan to spin at variable speeds, depending on the engine’s cooling needs. There are two primary types of fan clutches: mechanical and viscous. Mechanical fan clutches use a thermostatic spring to engage and disengage the fan, while viscous fan clutches utilize a silicone-based fluid that changes viscosity with temperature, allowing for a more gradual and precise control of fan speed ².

Purpose of the 4936007 Fan Clutch

The 4936007 Fan Clutch is integral to the operation of a truck’s engine cooling system. It manages engine temperature by adjusting the fan speed to match the cooling requirements. This adaptive function not only helps in maintaining engine efficiency but also contributes to improved fuel economy by reducing the parasitic load on the engine when full fan speed is not necessary ³.

Key Features

The 4936007 Fan Clutch is characterized by its robust design and the use of high-quality materials that ensure durability and reliable performance. It incorporates advanced technological features such as a temperature-sensitive viscous coupling, which allows for precise control of fan speed. This design enhances the clutch’s ability to respond to varying engine loads and ambient temperatures.

Benefits of Using the 4936007 Fan Clutch

Utilizing the 4936007 Fan Clutch offers several advantages. It contributes to improved engine performance by ensuring that the engine operates within its optimal temperature range. This can lead to reduced wear on engine components and potentially lower fuel consumption. Additionally, the efficient operation of the fan clutch can result in less strain on the engine, promoting longer engine life.

Installation Process

Installing the 4936007 Fan Clutch requires careful attention to ensure proper fitting and function. The process involves removing the old fan clutch, cleaning the mounting surface, and then securing the new clutch in place. Specific tools may be required, and it is important to follow the manufacturer’s guidelines to ensure the clutch is installed correctly and operates as intended.

Troubleshooting Common Issues

Common issues with fan clutches may include overheating or unusual noises. These problems can often be traced to a malfunctioning clutch or improper installation. Diagnosing these issues may involve checking the clutch for signs of wear or damage, ensuring it is correctly installed, and verifying that it engages and disengages as designed.

Maintenance Tips

Regular maintenance of the 4936007 Fan Clutch is key to ensuring its longevity and efficient operation. This includes periodic inspections for signs of wear or damage, ensuring that the clutch engages and disengages smoothly, and checking for any leaks in the viscous coupling. Adhering to recommended inspection intervals can help in identifying potential issues before they lead to more significant problems.

Performance Under Various Conditions

The 4936007 Fan Clutch is designed to perform effectively under a range of driving conditions. Whether the truck is under heavy load or operating in extreme temperatures, the clutch’s ability to adjust fan speed helps in maintaining engine efficiency. In some cases, adjustments may be necessary to optimize performance under specific conditions, such as in particularly hot climates or when the truck is consistently operating under heavy load.

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including diesel and natural gas engines, as well as related technologies. With a strong reputation in the automotive industry, Cummins is known for its commitment to quality, innovation, and customer satisfaction. The company’s product range includes engines, filtration, emissions solutions, and power generation equipment, making it a comprehensive provider of power systems for various applications.

Compatibility with Cummins Engines

The Cummins Fan Clutch part number 4936007 is designed to fit a variety of Cummins engines, ensuring optimal cooling performance across different engine models. This part is engineered to maintain the efficiency of the engine’s cooling system by regulating the speed of the fan based on the engine’s temperature.

ISB Series

• ISB CM2150
• ISB CM850
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101

The ISB series engines, including the ISB CM2150, ISB CM850, ISB/ISD6.7 CM2150 SN, ISB6.7 CM2250, and ISB6.7 CM2350 B101, are all compatible with the Fan Clutch 4936007. This compatibility ensures that the fan clutch can effectively manage the cooling requirements of these engines, enhancing their longevity and performance.

ISBE Series

• ISBE CM2150
• ISBE4 CM850

The ISBE series engines, specifically the ISBE CM2150 and ISBE4 CM850, also support the use of the Fan Clutch 4936007. This compatibility is crucial for maintaining the cooling efficiency of these engines, ensuring they operate within optimal temperature ranges.

By fitting the Fan Clutch 4936007 to these engines, users can expect improved cooling efficiency, which helps in maintaining the engine’s performance and reducing the risk of overheating.

Role of 4936007 Fan Clutch in Engine Systems

The 4936007 fan clutch is a component in the thermal management of engine systems, working in conjunction with the drive and fan to maintain optimal operating temperatures.

When the engine is running, the drive system, typically connected to the crankshaft via a pulley, imparts rotational force to the fan. The fan, in turn, draws air through the radiator to cool the engine coolant. The 4936007 fan clutch acts as a mediator between the drive and the fan, modulating the fan’s speed based on the engine’s thermal needs.

During cold starts or low-temperature conditions, the fan clutch disengages, allowing the fan to spin freely with minimal resistance. This reduces parasitic load on the engine, enhancing fuel efficiency and allowing the engine to warm up more quickly. As the engine temperature rises, the fan clutch gradually engages, increasing the fan’s speed to enhance airflow through the radiator. This dynamic adjustment ensures that the engine maintains a stable operating temperature, preventing overheating while optimizing performance and fuel economy.

Conclusion

The 4936007 fan clutch plays a significant role in balancing the demands of engine cooling with the efficiency of the drive system, ensuring that both the fan and drive operate harmoniously to support the engine’s thermal management needs.