4936399
Temperature Switch
Cummins®

The Cummins 4936399 Temperature Switch is a component designed to monitor and regulate temperature within commercial trucks. It plays a role in ensuring the engine operates within safe temperature limits, contributing to the overall efficiency and reliability of the vehicle ¹.

Basic Concepts of Temperature Switches

A temperature switch is a device that opens or closes an electrical circuit in response to a specific temperature. It functions by using a temperature-sensitive element that expands or contracts with temperature changes, activating or deactivating the switch. In heavy-duty trucks, temperature switches are vital for maintaining optimal operating conditions, protecting the engine from overheating, and ensuring the efficiency of various systems ².

Purpose of the 4936399 Temperature Switch

This Cummins part is specifically designed to monitor the temperature within a truck’s engine cooling system. It activates cooling fans or other cooling mechanisms when the engine reaches a predetermined temperature, helping to maintain engine temperature within a safe range. Additionally, it may have applications in other systems where temperature regulation is necessary.

Key Features

This part is characterized by its robust design and high-quality materials, which contribute to its durability and reliability. It features a precise temperature-sensitive element that ensures accurate temperature readings and timely activation of cooling mechanisms. The switch is also designed to withstand the harsh conditions typical of commercial truck environments.

Benefits

Using the 4936399 Temperature Switch offers several benefits, including improved engine performance through effective temperature management, enhanced safety by preventing engine overheating, and increased durability due to its robust construction and reliable operation.

Installation

Installing this part requires careful preparation and adherence to best practices to ensure proper integration into the truck’s system. This includes verifying compatibility with the truck’s engine and cooling system, following manufacturer guidelines for installation, and ensuring all connections are secure and correctly positioned.

Troubleshooting

Common issues with the 4936399 Temperature Switch may include inaccurate temperature readings or failure to activate cooling mechanisms. Troubleshooting steps involve checking the switch’s connections, verifying the integrity of the temperature-sensitive element, and ensuring the switch is correctly positioned within the engine cooling system.

Maintenance

To ensure the long-term reliability and performance of this part, regular maintenance is recommended. This includes periodic checks for signs of wear or damage, ensuring connections remain secure, and replacing the switch according to manufacturer recommendations or if it shows signs of failure.

Safety Considerations

When working with the 4936399 Temperature Switch, it is important to follow safety procedures to avoid damage or injury. This includes ensuring the engine is cool before beginning work, using appropriate tools and protective equipment, and following manufacturer guidelines for handling and installation.

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 is renowned for its innovation, quality, and commitment to customer success in the commercial truck industry and beyond ³.

Temperature Switch Compatibility with Cummins Engines

The Temperature Switch part number 4936399, manufactured by Cummins, is a component in ensuring the optimal performance and longevity of various Cummins engines. This part is designed to monitor and regulate the engine’s temperature, providing feedback to the engine control unit (ECU) to maintain safe operating conditions.

B4.5 RGT Engines

The B4.5 RGT engine series is known for its reliability and efficiency, commonly used in a variety of applications, including agricultural and industrial machinery. The Temperature Switch part number 4936399 is specifically engineered to fit seamlessly within the B4.5 RGT engine architecture. This part ensures that the engine operates within its optimal temperature range, preventing overheating and potential damage. The switch’s precise placement and integration within the engine’s cooling system allow for accurate temperature readings, which are crucial for maintaining engine performance and efficiency.

Grouping of Engines

While the B4.5 RGT engine is a notable example, the Temperature Switch part number 4936399 is also compatible with other Cummins engines that share similar design and operational parameters. This compatibility extends to various engine models within the Cummins portfolio, ensuring that the switch can be utilized across multiple platforms without compromising its functionality or performance. The design and engineering of this part are such that it can be adapted to fit within the specific thermal management systems of different engine models, providing a standardized solution for temperature regulation across Cummins’ engine lineup.

Role of Part 4936399 Temperature Switch in Engine Systems

The part 4936399 temperature switch is an integral component in the regulation and monitoring of engine temperature within various engine systems. This switch operates by sensing the temperature of the engine coolant and signaling the engine control unit (ECU) when the temperature reaches a predetermined threshold.

In fuel pump systems, the temperature switch ensures that the fuel is delivered at an optimal temperature, enhancing combustion efficiency and protecting the fuel pump from overheating. It works in conjunction with the fuel pump to maintain a stable fuel flow, which is essential for consistent engine performance.

When integrated with the main pump, the temperature switch helps in maintaining the overall temperature balance of the engine. It ensures that the pump operates within safe temperature limits, preventing overheating and potential damage to the pump and other engine components.

For fuel systems, the temperature switch plays a significant role in preventing fuel from becoming too hot, which can lead to vaporization and inefficient combustion. By monitoring and regulating the temperature, it helps in maintaining the fuel’s viscosity and ensuring smooth engine operation.

Conclusion

In summary, the part 4936399 temperature switch is a key component in ensuring that engine systems operate within safe temperature ranges, thereby enhancing performance, efficiency, and longevity of the engine and its components.