4946237
Filler Cap
Cummins®

Introduction

The Cummins 4946237 Filler Cap is a component designed for use in commercial trucks. Its primary role is within the vehicle’s fuel system, where it facilitates the addition of fuel to the tank while ensuring that spills and contamination are minimized. This part is integral to maintaining the efficiency and safety of the truck’s fuel system ¹.

Purpose and Functionality

The Cummins 4946237 Filler Cap serves a function in the truck’s fuel system by allowing fuel to be added to the tank in a controlled manner. It is engineered to create a seal that prevents fuel from spilling out during the refueling process. Additionally, the cap is designed to keep contaminants out of the fuel tank, which helps maintain the quality of the fuel and the overall performance of the truck’s engine ².

Key Features

The Cummins 4946237 Filler Cap is characterized by its robust design and the materials used in its construction. It is typically made from durable plastics or metals that can withstand the rigors of commercial truck use. The cap may include features such as a spring-loaded valve that opens upon insertion of the fuel nozzle, ensuring a secure fit and effective sealing. Its design may also incorporate anti-static properties to reduce the risk of sparks during refueling ³.

Benefits

The use of the Cummins 4946237 Filler Cap offers several advantages. It contributes to the integrity of the fuel system by providing a reliable seal that prevents fuel loss and contamination. The cap is designed for ease of use, allowing for quick and efficient refueling. Furthermore, it is compatible with Cummins fuel tanks, ensuring a proper fit and function within the system ⁴.

Installation and Usage

Proper installation of the Cummins 4946237 Filler Cap is important to maintain the integrity of the fuel system. The cap should be securely fastened to the fuel tank to ensure a tight seal. Users should follow the manufacturer’s guidelines for installation to avoid common pitfalls that could lead to fuel leaks or improper sealing ⁵.

Maintenance and Troubleshooting

Routine maintenance of the Cummins 4946237 Filler Cap is recommended to ensure its long-term performance. This may include checking for signs of wear or damage and cleaning the cap to remove any buildup that could affect its sealing capabilities. Common issues with filler caps can include leaks or difficulty in opening, which may be addressed by inspecting the cap for damage or ensuring that it is properly seated on the tank ⁶.

Safety Considerations

When handling and maintaining the Cummins 4946237 Filler Cap, it is important to observe safety precautions to prevent fuel spills, fires, and other hazards. This includes ensuring that the area is well-ventilated during refueling and that static electricity is discharged before fuel transfer begins. Users should also be aware of the potential for fuel vapors and take steps to avoid ignition sources ⁷.

Environmental Impact

The use of filler caps in commercial trucks has environmental considerations, particularly in preventing fuel spills and contamination. The Cummins 4946237 Filler Cap is designed with these considerations in mind, providing a barrier against spills and helping to protect the environment from the effects of fuel contamination ⁸.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and a diverse product range, Cummins is committed to providing reliable and efficient solutions for the automotive industry, including components like the Cummins 4946237 Filler Cap that contribute to the performance and safety of commercial trucks ⁹.

Cummins Engine Filler Cap Compatibility

The Cummins part number 4946237, a Filler Cap, is designed to fit a variety of Cummins engines. Below is a detailed description of the compatibility of this filler cap across different engine models.

B4.5 Series Engines

• B4.5 CM2350 B129B
• ISB4.5 CM2350 B104

D4.0 Series Engines

• D4.0 CM2620 D103B

F2.8 Series Engines

• F2.8 CM2620 F135B
• ISF2.8 CM2220 F117
• ISF2.8 CM2220 F129

F3.8 Series Engines

• F3.8 CM2350 F120B
• F3.8 CM2350 F128C
• F3.8 CM2620 F137B
• F3.8 F102
• ISF3.8 CM2220 AN
• ISF3.8 CM2220 F103
• ISF3.8 CM2350 F109
• QSF3.8 CM2350 F107
• QSF3.8 CM2880 F112

F4.5 Series Engines

• F4.5 CM2620 F139B
• F4.5 CM2620 F141C

ISF4.5 Series Engines

• ISF4.5 CM2220 F123

QSF2.8 Series Engines

• QSF2.8 CM2880 F104
• QSF2.8 CM2880 F105
• QSF2.8 CM2880 F108
• QSF2.8 CM2880 F114

R2.8 Series Engines

• R2.8 CM2220 R101B

This filler cap is engineered to ensure a secure and leak-proof seal, maintaining the integrity of the engine’s fuel system. It is compatible with the listed engine models, providing a standardized fit across various Cummins engine series ¹⁰.

Role of Part 4946237 Filler Cap in Engine Systems

The part 4946237 Filler Cap is a component in the arrangement of various engine systems, ensuring the smooth operation and maintenance of the engine.

Oil Fill Arrangement

In the oil fill arrangement, the Filler Cap plays a role by providing a secure and sealed point for adding oil to the engine. This ensures that the oil level is maintained at the optimal level, which is necessary for the lubrication of moving parts within the engine. The seal provided by the Filler Cap prevents oil leaks and contamination, maintaining the integrity of the oil and the efficiency of the lubrication system ¹¹.

Valve Cover Arrangement

The Filler Cap is also integral to the valve cover arrangement. The valve cover protects the valve train components and retains engine oil within the crankcase. The Filler Cap, when properly installed on the valve cover, ensures that the valve cover remains sealed, preventing oil leaks and the ingress of contaminants. This seal is vital for maintaining the cleanliness and performance of the valve train components ¹².

Valve and Valve Cover Interaction

Furthermore, the interaction between the Filler Cap and the valve cover is important for the overall health of the valve system. The Filler Cap allows for the periodic checking of the oil level without disturbing the sealed environment of the valve cover. This is particularly important during maintenance checks, where the Filler Cap can be removed to assess the oil level and condition without exposing the valve components to potential contaminants ¹³.

Conclusion

In summary, the part 4946237 Filler Cap is a key component in maintaining the integrity and efficiency of the oil fill and valve cover arrangements within engine systems. Its proper installation and maintenance are essential for the optimal performance and longevity of the engine.