4984876
Temperature Switch
Cummins®

The Cummins 4984876 Temperature Switch is a component designed for use in commercial trucks. It serves to monitor and regulate engine temperature, ensuring optimal performance and longevity of the engine. This switch is integral to maintaining the engine’s operational efficiency by providing accurate temperature readings and facilitating timely responses to temperature changes.

Basic Concepts of Temperature Switches

A temperature switch is a device that opens or closes an electrical circuit in response to temperature changes. It consists of a sensing element that detects temperature variations and a switching mechanism that activates or deactivates the circuit based on predefined temperature thresholds. In automotive systems, temperature switches are commonly used to manage engine cooling, ensuring that the engine operates within safe temperature ranges ¹.

Purpose of the Cummins 4984876 Temperature Switch

The Cummins 4984876 Temperature Switch plays a role in the engine cooling system by monitoring the engine’s temperature and activating the cooling fan or other cooling mechanisms when necessary. It helps prevent overheating by ensuring that the engine maintains an optimal operating temperature. Additionally, this switch can be integrated into other systems to provide temperature-related data for engine management and diagnostic purposes ².

Key Features

The Cummins 4984876 Temperature Switch is characterized by its robust design and high-quality materials, which contribute to its durability and reliability. Key features include a precision-engineered sensing element, a durable housing that resists corrosion and mechanical stress, and a reliable switching mechanism. These design elements ensure accurate temperature detection and consistent performance under various operating conditions.

Benefits

Using the Cummins 4984876 Temperature Switch offers several benefits. It contributes to improved engine performance by ensuring that the engine operates within the optimal temperature range. This helps enhance fuel efficiency and reduce the risk of engine damage due to overheating. Additionally, the switch’s durable construction and reliable operation contribute to its long service life, providing consistent temperature management over time.

Installation and Integration

Proper installation of the Cummins 4984876 Temperature Switch involves mounting it in a location where it can accurately sense the engine temperature, typically near the engine block or coolant passages. It should be connected to the appropriate electrical circuits according to the vehicle’s wiring diagram. Ensuring a secure and correct installation is important for the switch to function effectively and provide accurate temperature readings.

Troubleshooting and Maintenance

Common issues with the Cummins 4984876 Temperature Switch may include inaccurate temperature readings or failure to activate cooling mechanisms. Troubleshooting involves checking the switch’s connections, ensuring it is properly mounted, and verifying that the electrical circuit is intact. Regular maintenance, such as inspecting for corrosion or damage and ensuring the switch operates within specified parameters, can help ensure its longevity and optimal performance.

Performance in Various Conditions

The Cummins 4984876 Temperature Switch is designed to perform reliably under a range of operating conditions, including extreme temperatures and heavy-duty usage. Its robust construction and precise sensing capabilities allow it to provide accurate temperature readings and effective control of cooling systems, even in demanding environments.

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, innovation, and reliability 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.

Compatibility of Temperature Switch Part 4984876 with Cummins Engines

The Temperature Switch part number 4984876, manufactured by Cummins, is designed to be compatible with a range of Cummins engines. This part is essential for maintaining optimal engine performance by regulating the engine’s temperature.

Compatibility with Specific Engine Models

• 4B3.9 and 6B5.9 Engines: The Temperature Switch part 4984876 is specifically engineered to fit seamlessly with the 4B3.9 and 6B5.9 engines. These engines are known for their robust performance and reliability, and the temperature switch ensures that they operate within safe temperature limits. By monitoring and regulating the engine’s temperature, this part helps prevent overheating and ensures efficient engine operation.

• 6C8.3 Engine: Similarly, the 6C8.3 engine is also compatible with the Temperature Switch part 4984876. This engine model is designed for heavy-duty applications, and the temperature switch plays a crucial role in maintaining the engine’s performance under demanding conditions. The switch helps in detecting any temperature fluctuations and takes corrective actions to maintain the engine’s optimal operating temperature.

Grouping of Compatible Engines

The Temperature Switch part 4984876 is designed to fit a variety of Cummins engines, including the 4B3.9, 6B5.9, and 6C8.3 models. These engines, while differing in specifications and applications, share a common requirement for precise temperature regulation. The compatibility of the temperature switch with these engines ensures that they can all benefit from the same high-quality component, providing consistent performance and reliability across different engine types.

By ensuring that the Temperature Switch part 4984876 is compatible with these specific engine models, Cummins maintains a high standard of quality and performance for its engine components. This compatibility allows for easier maintenance and replacement, ensuring that the engines continue to operate efficiently and reliably.

Role of Part 4984876 Temperature Switch in Engine Systems

The part 4984876 Temperature Switch is an integral component in the thermal management system of engine operations. It works in conjunction with the coolant temperature sensor to monitor the temperature of the engine coolant. When the coolant reaches a specific temperature, the switch activates, signaling the engine control unit (ECU) to make necessary adjustments.

This switch is typically connected to the engine’s cooling system, where it interfaces with the thermostat and radiator. Its activation can trigger the radiator fan to turn on, enhancing coolant circulation and dissipating heat more effectively. Additionally, the switch may also interact with the vehicle’s heating system, ensuring that the cabin remains comfortable for occupants.

In more advanced engine systems, the Temperature Switch may also communicate with the fuel injection system. By providing temperature data, it helps optimize fuel delivery based on engine temperature, thereby improving fuel efficiency and reducing emissions.

Furthermore, the switch plays a role in preventing engine overheating. If the coolant temperature exceeds safe limits, the switch can cut off the fuel supply or reduce engine power, protecting the engine from potential damage.

Overall, the part 4984876 Temperature Switch is a key element in maintaining engine performance and efficiency across various operating conditions ³.

Conclusion

The Cummins 4984876 Temperature Switch is a vital component in the engine cooling system of commercial trucks. Its role in monitoring and regulating engine temperature ensures optimal performance and longevity of the engine. With its robust design, precise sensing capabilities, and compatibility with various Cummins engines, this switch provides reliable temperature management under a range of operating conditions. Proper installation, regular maintenance, and troubleshooting are essential to ensure the switch’s longevity and optimal performance.