4990285
Thermostat
Cummins®

Introduction

The Cummins 4990285 Thermostat is a component designed for use in commercial trucks. It serves a role in the engine cooling system, ensuring that the engine operates within the optimal temperature range. This thermostat is engineered to maintain engine efficiency and protect the engine from potential damage caused by temperature extremes.

Basic Concepts of a Thermostat

A thermostat is a device that regulates temperature within an engine cooling system. It operates by opening and closing in response to the temperature of the engine coolant. When the engine is cold, the thermostat remains closed, preventing coolant from flowing through the radiator. As the engine warms up, the thermostat opens, allowing coolant to circulate and dissipate heat. This process helps maintain the engine at an optimal operating temperature ¹.

Purpose of the Cummins 4990285 Thermostat

This Cummins part plays a role in maintaining optimal engine temperature by regulating the flow of coolant through the engine cooling system. It ensures that the engine reaches and maintains its operating temperature efficiently. This regulation is important for engine performance, fuel efficiency, and the longevity of engine components. By preventing overheating or underheating, the thermostat helps protect the engine from potential damage ².

Key Features

The Cummins 4990285 Thermostat is distinguished by its specific design and the materials used in its construction. It is engineered with precision to ensure accurate temperature regulation. The thermostat incorporates durable materials that withstand the harsh conditions of commercial truck operations. Additionally, it may feature technological advancements that enhance its performance and reliability.

Benefits

Using the Cummins 4990285 Thermostat offers several advantages. It contributes to improved engine performance by ensuring the engine operates within the optimal temperature range. This regulation can lead to better fuel efficiency and reduced emissions. The thermostat also plays a role in extending the longevity of engine components by protecting them from temperature-related stress. Its reliable operation in various operating conditions makes it a valuable component for commercial truck engines ³.

Installation and Compatibility

Proper installation of the Cummins 4990285 Thermostat is important to ensure its effective operation. Installation guidelines should be followed to ensure the thermostat is correctly positioned and secured. It is also important to verify compatibility with the truck’s engine model to ensure optimal performance and reliability.

Troubleshooting and Maintenance

Common issues associated with thermostats include failure to open or close properly, which can lead to overheating or underheating of the engine. Symptoms of a failing thermostat may include fluctuating temperature gauge readings, overheating, or poor engine performance. Troubleshooting steps may involve testing the thermostat’s operation and replacing it if necessary. Regular maintenance, such as inspecting and replacing the thermostat at recommended intervals, can help ensure its longevity and efficient operation.

Cummins Corporation Overview

Cummins Inc. is a renowned manufacturer with a history of innovation and quality in the production of engine components. The company is recognized for its commitment to developing reliable and efficient parts for various applications, including commercial trucks. Cummins’ reputation in the industry is built on its dedication to engineering excellence and customer satisfaction.

Thermostat 4990285 for Cummins Engines

The thermostat 4990285, manufactured by Cummins, is a component designed to maintain the optimal operating temperature of various Cummins engines. This part is integral to ensuring the engine operates efficiently and reliably.

Compatibility with Cummins Engines

• ISB (Chrysler) Engines: The thermostat 4990285 is specifically engineered to fit seamlessly within the ISB engines used in Chrysler vehicles. It ensures that the engine maintains the correct temperature range, preventing overheating and ensuring efficient fuel consumption.

• Other Cummins Engines: This thermostat is also compatible with a range of other Cummins engines, providing the same level of precision and reliability. Its design allows it to integrate smoothly into various engine configurations, ensuring consistent performance across different models.

Functionality and Importance

The thermostat 4990285 plays a role in the engine’s cooling system by regulating the flow of coolant. It opens and closes in response to the engine’s temperature, allowing coolant to circulate when the engine is warm and preventing circulation when the engine is cold. This ensures that the engine reaches its optimal operating temperature quickly and maintains it throughout its operation.

Installation and Maintenance

Installing the thermostat 4990285 requires careful attention to ensure it fits correctly within the engine’s design. Regular maintenance checks should be performed to verify that the thermostat is functioning properly, as a faulty thermostat can lead to engine overheating or inefficient operation.

By ensuring the thermostat 4990285 is correctly installed and maintained, owners of Cummins engines can enjoy reliable performance and longevity of their engines.

Role of Part 4990285 Thermostat in Engine Systems

The thermostat, identified by part number 4990285, is a component in maintaining the optimal operating temperature of an engine. It is strategically positioned between the engine and the radiator within the cooling system.

When the engine is cold, the thermostat remains closed, preventing coolant from flowing to the radiator. This allows the engine to warm up more quickly, enhancing efficiency and reducing emissions during the initial phase of operation.

As the engine temperature rises, the thermostat gradually opens, allowing coolant to circulate through the radiator where it is cooled before returning to the engine. This continuous cycle ensures that the engine maintains a consistent temperature, which is vital for efficient operation and longevity.

The thermostat works in conjunction with several other components:

• Water Pump: Circulates the coolant through the engine and to the radiator.
• Radiator: Dissipates heat from the coolant.
• Coolant Temperature Sensor: Monitors the temperature of the coolant and sends data to the engine control unit (ECU).
• ECU: Adjusts the operation of the engine based on temperature readings to optimize performance and fuel efficiency.

Conclusion

In summary, the thermostat (part 4990285) plays a role in the thermal management of the engine, ensuring it operates within the desired temperature range for optimal performance and durability.