3999758
Filler Cap
Cummins®

The Cummins Fuel Filler Cap, part number 3999758, is a component specifically designed for heavy-duty trucks. Cummins, a prominent name in diesel engine manufacturing, produces this fuel filler cap to meet the rigorous demands of commercial vehicles. Fuel filler caps are integral to the fuel systems of trucks, ensuring the safe and efficient transfer of fuel into the vehicle’s tank while preventing spillage and maintaining system integrity.

Purpose and Function

The Cummins Fuel Filler Cap 3999758 is engineered to perform multiple functions within the fuel system of a truck. It allows for the secure and controlled introduction of fuel into the tank. Additionally, it prevents fuel spillage during the refueling process. The cap also helps maintain the system’s pressure, which is essential for the efficient operation of the fuel system. By sealing the fuel tank, it prevents the escape of fuel vapors, contributing to both safety and environmental protection.

Key Features

This Cummins part is constructed from durable materials that ensure longevity and reliable performance under the demanding conditions faced by heavy-duty trucks. Its design includes advanced sealing mechanisms that provide a tight seal, preventing fuel leakage and the escape of fuel vapors. Unique design elements enhance its performance, ensuring it can withstand the rigors of frequent use and exposure to various environmental conditions.

Benefits

Utilizing the Cummins Fuel Filler Cap 3999758 offers several advantages. It contributes to improved fuel system integrity by ensuring a secure seal on the fuel tank. Enhanced safety features are incorporated into its design, reducing the risk of fuel spillage and associated hazards. Additionally, the cap can lead to potential cost savings through reduced fuel loss and lower maintenance requirements, making it a valuable component for fleet operators.

Installation and Compatibility

Proper installation of the Fuel Filler Cap 3999758 is crucial for ensuring optimal performance and safety. Guidelines for installation should be followed to secure the cap correctly and ensure it functions as intended. Compatibility with various truck models and fuel systems is a key consideration, ensuring that the cap fits securely and operates effectively across different applications.

Maintenance and Troubleshooting

To ensure the longevity and reliable operation of the Fuel Filler Cap 3999758, regular maintenance is recommended. This includes checking for signs of wear or damage and ensuring the sealing mechanisms are functioning correctly. Common issues that may arise include difficulty in securing the cap or signs of fuel leakage. Troubleshooting steps can involve inspecting the cap for damage, cleaning the sealing surfaces, and replacing the cap if necessary to maintain system integrity.

Regulatory Compliance

The Fuel Filler Cap 3999758 complies with industry standards and regulations regarding fuel systems in commercial vehicles. Adhering to these standards is important for ensuring safety and legal compliance. The cap’s design and materials meet or exceed these requirements, providing fleet operators with confidence in its use.

Environmental Impact

Using a high-quality fuel filler cap like the 3999758 contributes to reduced fuel evaporation emissions, playing a part in minimizing the environmental impact of heavy-duty trucks. By preventing the escape of fuel vapors, it helps in maintaining overall fleet efficiency and reducing the carbon footprint of commercial vehicle operations.

Cummins Overview

Cummins Inc. is a leader in the diesel engine manufacturing industry, with a history of innovation and expertise in powering commercial vehicles. The company’s commitment to developing reliable and efficient engine components, including the Fuel Filler Cap 3999758, underscores its dedication to enhancing the performance and safety of heavy-duty trucks.

Compatibility of Cummins Fuel Filler Cap 3999758

The Cummins Fuel Filler Cap, part number 3999758, is designed to fit a variety of engine models. This cap is essential for maintaining the integrity of the fuel system by preventing contamination and ensuring proper fuel storage. Below is a detailed look at the compatibility of this part with various Cummins engines.

K38 and K50 Engines

The Cummins Fuel Filler Cap 3999758 is compatible with the K38 and K50 engines. These engines are known for their robust performance and reliability in various applications. The cap ensures a secure seal, preventing fuel evaporation and contamination.

QSK50 CM2150 Engines

The QSK50 CM2150 engines also benefit from the use of the Cummins Fuel Filler Cap 3999758. This cap is engineered to fit seamlessly with the design specifications of the QSK50 CM2150, ensuring optimal performance and longevity of the fuel system.

QSK50 CM2150 MCRS and QSK60 CM850 MCRS Engines

For the more advanced QSK50 CM2150 MCRS and QSK60 CM850 MCRS engines, the Cummins Fuel Filler Cap 3999758 provides a critical component in maintaining the fuel system’s efficiency. These engines are designed for high-performance applications, and the cap ensures that the fuel remains uncontaminated and secure.

K107 Engines

The K107 engine is another model that is compatible with the Cummins Fuel Filler Cap 3999758. This cap is designed to fit the specific requirements of the K107 engine, ensuring that the fuel system operates smoothly and efficiently.

By using the Cummins Fuel Filler Cap 3999758, operators of these engines can be confident that their fuel systems are protected, leading to better overall performance and reliability.

Role of Part 3999758 Fuel Filler Cap in Engine Systems

Part 3999758 Fuel Filler Cap is integral to the efficient operation of several engine systems. It interfaces directly with the fuel tank, ensuring a secure seal that prevents fuel vapors from escaping into the atmosphere. This containment is essential for maintaining the correct fuel pressure within the tank, which in turn supports consistent fuel delivery to the engine ¹.

The Fuel Filler Cap also plays a role in the Evaporative Emission Control (EVAP) system. By sealing the fuel tank, it helps to capture fuel vapors that would otherwise be released into the environment. These vapors are routed through the EVAP system and re-introduced into the engine’s combustion process, enhancing fuel efficiency and reducing emissions ².

In the context of the Heat Exchanger and Engine Cooling System, the proper functioning of the Fuel Filler Cap indirectly supports these systems. Efficient fuel delivery ensures optimal combustion, which is vital for the Heat Exchanger to effectively manage the engine’s thermal output. The Engine Cooling System benefits from stable engine operation, as consistent combustion temperatures help maintain the cooling system’s efficiency ³.

Overall, Part 3999758 Fuel Filler Cap contributes to the seamless interaction between the fuel system and other engine components, promoting efficient and environmentally friendly engine performance.

Conclusion

The Cummins Fuel Filler Cap 3999758 is a critical component for heavy-duty trucks, ensuring the safe and efficient operation of the fuel system. Its durable construction, advanced sealing mechanisms, and compatibility with various Cummins engines make it a valuable asset for fleet operators. By maintaining system integrity, enhancing safety, and contributing to environmental protection, this part plays a significant role in the overall performance and reliability of heavy-duty trucks.