3914738
Oil Filler Tube
Cummins®

The Oil Filler Tube 3914738 is a component manufactured by Cummins, designed for use in commercial trucks. This article provides an overview of the oil filler tube, its function, key features, benefits, and maintenance suggestions.

Basic Concepts of an Oil Filler Tube

An oil filler tube is a part of the lubrication system in an engine. It allows for the addition of engine oil into the crankcase. The tube is typically connected to the oil cap and extends into the engine, ensuring that oil is directed properly into the system ¹.

Purpose of the 3914738 Oil Filler Tube

This Cummins part plays a role in the lubrication system by providing a pathway for adding engine oil. It ensures that oil is introduced into the crankcase efficiently, maintaining the necessary lubrication for engine components ².

Key Features

• Designed for durability and long-term use in heavy-duty applications.
• Manufactured to precise specifications to ensure proper fit and function.
• Constructed from high-quality materials to resist corrosion and wear.
• Engineered to handle the pressures and temperatures within the engine compartment.

Benefits

• Reliable oil addition to the engine, ensuring consistent lubrication.
• Durable construction reduces the need for frequent replacements.
• Designed to integrate seamlessly with Cummins engines, enhancing overall performance.
• Helps maintain engine efficiency and longevity by ensuring proper oil levels.

Troubleshooting and Maintenance

• Regularly inspect the oil filler tube for signs of wear, cracks, or leaks.
• Ensure the tube is securely connected to avoid oil spills or insufficient lubrication.
• Clean the area around the filler tube to prevent contaminants from entering the engine.
• If damage is detected, replace the tube to maintain the integrity of the lubrication system.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Known for their reliability and performance, Cummins components are widely used in various industries, including transportation, construction, and power generation.

Cummins Oil Filler Tube Part 3914738 Compatibility

This part is designed to fit a variety of Cummins engines, ensuring a secure and efficient oil filling process. It is compatible with the following engines:

Cummins M Series Engines

• 15N CM2380
• M104B

Cummins B Series Engines

• 4B3.9
• B4.5
• B5.9
• B5.9 G
• B5.9 GAS PLUS CM556

Cummins C Series Engines

• C GAS PLUS CM556

Cummins 6 Series Engines

• 6B5.9
• 6C8.3
• C8.3 G

Cummins ISB Series Engines

• ISB CM2150
• ISB CM550
• ISB CM850
• ISB5.9G CM2180
• ISB6.7 CM2250
• ISB6.7 CM2350 B101

Cummins ISC Series Engines

• ISC CM2150
• ISC CM554
• ISC CM850
• ISC8.3 CM2250

Cummins ISL Series Engines

• ISL CM2150
• ISL CM554
• ISL G CM2180
• ISL9 CM2150 SN
• ISL9 CM2250

Cummins ISF Series Engines

• ISF2.8 CM2220 F129

This comprehensive compatibility ensures that the Oil Filler Tube part 3914738 can be used across a wide range of Cummins engines, providing a reliable solution for maintaining proper oil levels and ensuring engine health.

Role of Part 3914738 Oil Filler Tube in Engine Systems

The Oil Filler Tube 3914738 is an essential component in the lubrication system of an engine. It facilitates the process of adding oil to the engine, ensuring that all moving parts are adequately lubricated for optimal performance and longevity.

Integration with Engine Components

1. Oil Fill Arrangement: The oil filler tube is a key part of the oil fill arrangement. It provides a direct pathway for oil to be introduced into the engine. This arrangement typically includes the oil filler cap, which is mounted on the tube. The cap is designed to be easily removable, allowing for convenient oil changes and top-ups.

2. Cylinder Block: The cylinder block houses the engine’s cylinders, pistons, and other critical components. The oil filler tube is strategically positioned to ensure that oil can flow directly into the cylinder block. This ensures that the oil reaches the crankshaft, connecting rods, and other internal components, providing necessary lubrication.

3. Cover: The engine cover, often made of metal or plastic, protects the internal components from external elements. The oil filler tube penetrates this cover, allowing access to the lubrication system while maintaining the integrity of the engine’s sealed environment.

4. Housing: Within the engine housing, the oil filler tube connects to the oil gallery or passages that distribute oil throughout the engine. This ensures that oil is evenly distributed to all necessary parts, including the valve train, camshaft, and bearings.

5. Flywheel: Although the flywheel is primarily responsible for storing rotational energy, it is part of the overall engine system that benefits from proper lubrication. The oil filler tube ensures that the lubrication system is adequately filled, indirectly supporting the flywheel’s function by maintaining the health of the crankshaft and other connected components.

Conclusion

In summary, the Oil Filler Tube 3914738 plays a significant role in the engine’s lubrication system by providing a direct and efficient means of adding oil. Its integration with the oil fill arrangement, cylinder block, cover, housing, and indirectly with the flywheel, ensures that the engine remains well-lubricated, promoting smooth operation and extended component life.