3928304
Filler Cap
Cummins®

The Cummins 3928304 Filler Cap is a component designed for use in commercial trucks, specifically within Cummins fuel systems. Its role is to facilitate the fueling process while ensuring the integrity of the fuel tank is maintained. This part is significant in the operation of heavy-duty trucks, contributing to the efficiency and safety of fuel management ¹.

Basic Concepts of a Filler Cap

A filler cap is a component of a vehicle’s fuel system that covers the opening through which fuel is added to the tank. It operates by sealing the fuel tank to prevent fuel spillage, contamination, and evaporation. The cap typically includes a mechanism to release built-up pressure within the tank, ensuring a smooth fueling process ².

Purpose of the Cummins 3928304 Filler Cap

The Cummins 3928304 Filler Cap is engineered to play a specific role in the fueling process of heavy-duty trucks. It seals the fuel tank, preventing fuel spillage and contamination. Additionally, it is designed to accommodate the fueling nozzle, allowing for efficient and secure refueling. The cap also helps maintain the pressure within the fuel tank, contributing to the overall efficiency of the fuel system ³.

Key Features

The Cummins 3928304 Filler Cap is constructed with materials that offer durability and resistance to the elements. It incorporates a sealing mechanism that ensures a tight fit on the fuel tank, minimizing the risk of leaks. The design may include features such as a pressure release valve and a tamper-evident seal, enhancing its performance and security.

Benefits

The Cummins 3928304 Filler Cap provides several advantages. It offers improved fuel security by preventing unauthorized access and tampering. The design facilitates ease of use during the refueling process. Additionally, it is compatible with Cummins fuel systems, ensuring seamless integration and optimal performance.

Installation Process

Installing the Cummins 3928304 Filler Cap involves several steps. First, ensure the fuel tank opening is clean and free of debris. Align the cap with the tank opening and turn it clockwise until it reaches the designated stop point, indicating a secure fit. Tools required may include a socket wrench for any fasteners present. It is important to follow the manufacturer’s instructions to ensure proper installation.

Maintenance and Care

Regular maintenance of the Cummins 3928304 Filler Cap is recommended to ensure longevity and optimal performance. This includes periodic inspection for signs of wear or damage. Cleaning the cap and the fuel tank opening can prevent buildup that may affect the seal. If any issues are detected, such as a compromised seal, replacement or repair may be necessary.

Troubleshooting Common Issues

Common problems associated with filler caps include leaks and difficulty in opening. If a leak is detected, inspect the cap for damage or misalignment. Difficulty in opening may be due to debris or a stuck mechanism. Gentle cleaning and lubrication may resolve this issue. If problems persist, professional assessment is advised.

Safety Considerations

When handling and maintaining the Cummins 3928304 Filler Cap, it is important to observe safety practices. This includes avoiding smoking or open flames near the fuel tank and ensuring proper ventilation during refueling. Wear protective gloves to prevent contact with fuel, and follow all safety guidelines provided by the manufacturer.

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 and innovation in the commercial truck industry. The company offers a wide range of products designed to meet the demanding requirements of heavy-duty applications.

Compatibility of Cummins Part 3928304 Filler Cap with Various Engine Models

The Cummins part 3928304 Filler Cap is designed to fit a range of engine models, ensuring compatibility across multiple applications. This filler cap is engineered to provide a secure and reliable seal for the fuel tank, preventing leaks and maintaining the integrity of the fuel system.

C GAS PLUS CM556 and L GAS PLUS CM556 Engines

The Filler Cap 3928304 is compatible with both the C GAS PLUS CM556 and L GAS PLUS CM556 engines. These engines are part of Cummins’ lineup of gas-powered engines, known for their efficiency and reliability in various applications.

C8.3 G, G8.3, and G8.3 CM558 Engines

The Filler Cap 3928304 is also suitable for the C8.3 G, G8.3, and G8.3 CM558 engines. These engines are part of Cummins’ G-Series, which are widely used in a variety of industries due to their robust performance and durability.

GTA8.3 CM558 and QSL9 G CM558 Engines

For the GTA8.3 CM558 and QSL9 G CM558 engines, the Filler Cap 3928304 provides a precise fit, ensuring that the fuel tank remains sealed and protected. These engines are part of Cummins’ advanced lineup, designed for high-performance applications.

ISL G CM2180 Engine

Lastly, the Filler Cap 3928304 is compatible with the ISL G CM2180 engine. This engine is known for its power and efficiency, making it a popular choice in heavy-duty applications.

By ensuring compatibility with these various engine models, the Cummins part 3928304 Filler Cap offers a versatile solution for maintaining the integrity of the fuel system across different engine types.

Role of Part 3928304 Filler Cap in Engine Systems

The Part 3928304 Filler Cap is an essential component in the lubrication system of an engine. Its primary function is to provide a secure and sealed point of entry for adding lubricant to the system. This cap interfaces with the valve cover, ensuring that the lubricant is directed into the cylinder block where it is needed most.

Once the lubricant is introduced through the filler cap, it flows into the cover and subsequently into the valve cover. This process ensures that all moving parts within the cylinder block and valve arrangement receive adequate lubrication. The filler cap’s design also prevents contaminants from entering the system during the lubrication process, maintaining the integrity and efficiency of the engine’s operation.

In summary, the Part 3928304 Filler Cap plays a significant role in maintaining the lubrication system’s effectiveness by ensuring proper lubricant addition and contamination prevention.

Conclusion

The Cummins 3928304 Filler Cap is a critical component in the fuel and lubrication systems of heavy-duty trucks. Its design ensures secure and efficient refueling, maintains the integrity of the fuel tank, and prevents contamination. Regular maintenance and proper installation are essential to ensure optimal performance and longevity of this Cummins part. By understanding its features, benefits, and compatibility with various engine models, users can effectively utilize the 3928304 Filler Cap to enhance the efficiency and safety of their vehicle’s fuel management system.