5274887
Thermostat
Cummins®

The Cummins 5274887 Thermostat is a component designed for use in heavy-duty trucks, playing a significant role in the operation of these vehicles. Its primary function is to regulate the engine’s temperature, ensuring it operates within optimal parameters. This regulation is vital for maintaining engine efficiency, reducing wear, and enhancing the overall longevity of the engine ².

Basic Concepts of a Thermostat

A thermostat is a device that senses the temperature of a system and performs actions to maintain that temperature within a set range. In the context of an engine cooling system, the thermostat monitors the engine’s temperature and controls the flow of coolant to the radiator. When the engine is cold, the thermostat remains closed, preventing coolant flow to the radiator and allowing the engine to warm up quickly. As the engine temperature rises, the thermostat gradually opens, allowing coolant to flow through the radiator, where it is cooled before returning to the engine. This process ensures that the engine maintains an optimal operating temperature ¹.

Purpose of the Cummins 5274887 Thermostat

The Cummins 5274887 Thermostat is specifically designed to maintain the optimal operating temperature of heavy-duty truck engines. By regulating the flow of coolant, it ensures that the engine does not overheat during operation or cool down too rapidly when idling. This temperature regulation is crucial for efficient engine operation, as it helps to reduce emissions, improve fuel efficiency, and prevent engine wear. Additionally, maintaining the correct engine temperature enhances the performance of other engine components, contributing to the overall reliability and longevity of the engine ².

Key Features

The Cummins 5274887 Thermostat is engineered with several features that enhance its performance and reliability. It is constructed from high-quality materials that are resistant to corrosion and wear, ensuring durability in harsh operating conditions. The thermostat incorporates a precise sealing mechanism to prevent coolant leaks, which could lead to engine overheating. Additionally, it is designed with temperature sensitivity that allows it to respond accurately to changes in engine temperature, ensuring consistent and reliable performance ².

Benefits of Using the Cummins 5274887 Thermostat

Using the Cummins 5274887 Thermostat offers several advantages. It contributes to improved engine efficiency by ensuring that the engine operates at its optimal temperature, which can lead to better fuel economy and reduced emissions. The thermostat also helps to minimize wear and tear on engine components by preventing overheating, which can cause damage and reduce the engine’s lifespan. Furthermore, its consistent performance under varying operating conditions ensures that the engine remains reliable and efficient, regardless of the environment or workload ².

Installation and Compatibility

Proper installation of the Cummins 5274887 Thermostat is crucial to ensure it functions correctly within the engine cooling system. It should be installed according to the manufacturer’s guidelines to ensure a secure fit and proper operation. The thermostat is compatible with various Cummins engine models, making it a versatile component for heavy-duty truck applications. Ensuring compatibility with the specific engine model is important to maintain the efficiency and reliability of the cooling system ².

Maintenance and Troubleshooting

Regular maintenance of the Cummins 5274887 Thermostat is important to ensure its longevity and effectiveness. This includes checking for signs of wear or damage, such as corrosion or leaks, and replacing the thermostat if necessary. Troubleshooting common issues, such as overheating or inconsistent temperature regulation, may involve inspecting the thermostat for proper operation and ensuring that the cooling system is free of obstructions or leaks. Regular maintenance and prompt attention to any issues can help to prevent more serious problems and ensure the thermostat continues to perform reliably ².

Performance in Various Operating Conditions

The Cummins 5274887 Thermostat is designed to perform reliably under a wide range of operating conditions. Whether facing extreme temperatures, heavy loads, or varying speeds, the thermostat maintains its ability to regulate engine temperature effectively. Its robust construction and precise temperature sensitivity ensure that it can handle the demands of heavy-duty truck applications, providing consistent performance and reliability in diverse environments ².

Cummins Corporation Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions, including 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 automotive and heavy-duty truck industry. The company’s commitment to excellence is evident in its product range, which includes high-performance components designed to meet the demanding requirements of modern engines. Cummins’ dedication to quality and innovation ensures that its products, like the 5274887 Thermostat, deliver reliable performance and durability in challenging applications ².

Compatibility with Cummins Engines

The thermostat part number 5274887, manufactured by Cummins, is designed to fit a variety of Cummins engines. This part is crucial for maintaining the optimal operating temperature of the engine by regulating the flow of coolant. Below is a detailed description of its compatibility with the listed engines:

Compatibility with 6C8.3 and QSC8.3 CM2880 C102

The thermostat 5274887 is compatible with the 6C8.3 engine as well as the QSC8.3 CM2880 C102 engine. These engines share similar thermal management requirements, making this thermostat a suitable fit for both.

Compatibility with L8.9 Series

The thermostat 5274887 is also compatible with several variants of the L8.9 engine, including:

• L8.9
• L8.9 CM2670 L134C
• L8.9 L121
• L8.9G CMOH2.0 L125B

These engines, while differing in some specifications, share a common need for precise temperature regulation, which the 5274887 thermostat effectively provides.

Compatibility with L9 Series

The thermostat 5274887 fits the following L9 engines:

• L9 CM2670 L128B
• L9.3 L105
• L9.5 L117

These engines are part of the same family and have similar thermal management needs, ensuring that the thermostat can maintain the required operating temperatures.

Compatibility with ISL9 Series

The ISL9 CM2150 SN and ISL9.5 CM2880 L138 engines are also compatible with the thermostat 5274887. These engines, while part of the ISL series, share thermal management requirements that this thermostat can meet.

Compatibility with QSL8.9 and QSL9.3 Series

The thermostat 5274887 is compatible with the following QSL engines:

• QSL8.9 CM2150 L141
• QSL9.3 CM2880 L113

These engines, despite being part of the QSL series, have similar thermal management needs that this thermostat can effectively address.

By ensuring compatibility with a wide range of Cummins engines, the thermostat 5274887 provides a reliable solution for maintaining optimal engine temperatures across different engine models ².

Understanding the Role of Part 5274887 Thermostat in Engine Systems

The part 5274887 thermostat is an essential component in maintaining the optimal operating temperature of an engine. Its primary function is to regulate the flow of coolant between the engine and the radiator. 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, reducing wear on engine components during cold starts.

As the engine temperature rises, the thermostat gradually opens, allowing coolant to circulate through the engine block, cylinder head, and radiator. This process effectively dissipates heat, ensuring that the engine operates within its designed temperature range.

The thermostat interacts with several key components within the engine system:

• Coolant passages: The thermostat is positioned in the coolant passages, controlling the flow of coolant based on temperature.
• Water pump: Driven by a belt connected to the engine, the water pump circulates coolant through the system. The thermostat’s position influences how much coolant the pump sends to the radiator.
• Radiator: The radiator dissipates heat from the coolant. The thermostat ensures that coolant only flows to the radiator when the engine has reached operating temperature.
• Temperature sensor: This sensor monitors the engine temperature and sends data to the engine control unit (ECU). The thermostat’s function directly impacts the readings from this sensor.
• ECU: The engine control unit uses temperature data to make adjustments to fuel injection, ignition timing, and other parameters, ensuring efficient engine operation.

In summary, the part 5274887 thermostat plays a significant role in the thermal management of the engine, interacting with various components to maintain optimal performance and efficiency ¹.

Conclusion

The Cummins 5274887 Thermostat is a critical component in the thermal management of heavy-duty truck engines. By regulating the flow of coolant and maintaining optimal engine temperature, it contributes to improved engine efficiency, reduced emissions, and enhanced engine longevity. Its robust construction, precise temperature sensitivity, and compatibility with various Cummins engines make it a reliable and versatile solution for maintaining engine performance in demanding applications ².