3914766
Oil Filler Tube
Cummins®

The Cummins 3914766 Oil Filler Tube is a component designed for use in commercial trucks. It serves a specific function within the engine’s lubrication system, contributing to the overall efficiency and reliability of the vehicle. Understanding its purpose and operation is beneficial for maintaining the truck’s performance and longevity.

Basic Concepts of Oil Filler Tubes

An oil filler tube is a part of the lubrication system in an engine. Its primary function is to provide a pathway for adding oil to the engine, ensuring that the lubrication system maintains the correct oil level. This is vital for the engine’s performance, as proper lubrication reduces friction between moving parts, minimizes wear, and helps in dissipating heat. A well-maintained lubrication system contributes to the engine’s overall performance and extends its operational life ¹.

Purpose of the Cummins 3914766 Oil Filler Tube

This Cummins part plays a role in the lubrication system by allowing for the addition of oil to the engine. It ensures that the oil level remains within the manufacturer’s specified range, which is necessary for optimal engine operation. By facilitating easy and accurate oil addition, it helps in maintaining the engine’s efficiency and reliability ².

Key Features

The Cummins 3914766 Oil Filler Tube is constructed from materials that offer durability and resistance to the harsh conditions within an engine compartment. Its design includes features that enhance its longevity, such as a secure fitting to prevent leaks and a robust construction to withstand high pressures and temperatures. These characteristics differentiate it from other oil filler tubes, providing a reliable solution for commercial truck engines ³.

Benefits

Using this Cummins part can lead to improved engine performance due to its role in maintaining proper oil levels. Its durable construction contributes to the longevity of the engine’s lubrication system, potentially reducing the need for frequent replacements. Additionally, by ensuring efficient oil addition and maintenance, it may offer cost savings over time through enhanced engine reliability and performance ⁴.

Installation Process

Installing the Cummins 3914766 Oil Filler Tube requires following a series of steps to ensure it is securely and correctly fitted. This process involves preparing the engine compartment, using the appropriate tools to remove the old tube (if applicable), and carefully installing the new tube. Safety precautions, such as ensuring the engine is cool and disconnected from any power source, should be observed throughout the installation process.

Maintenance Tips

To ensure the optimal performance and longevity of the Cummins 3914766 Oil Filler Tube, regular maintenance is recommended. This includes inspecting the tube for signs of wear or damage, cleaning it as necessary to remove any debris that could affect its operation, and following the manufacturer’s guidelines for replacement schedules. Proper maintenance helps in preventing issues such as leaks or blockages, ensuring the lubrication system operates efficiently.

Troubleshooting Common Issues

Common issues with the Cummins 3914766 Oil Filler Tube may include leaks or blockages. These can often be identified through regular inspections and maintenance checks. Troubleshooting steps may involve cleaning the tube to remove any obstructions, checking for proper fitting to ensure there are no leaks, and, if necessary, replacing the tube to restore the lubrication system’s functionality.

Cummins Overview

Cummins Inc. is a well-established company in the automotive and heavy-duty truck industry, known for its commitment to producing high-quality components. With a history of innovation and excellence, Cummins has built a reputation for reliability and performance in the components it manufactures. The company’s dedication to quality is evident in its wide range of products, including the Cummins 3914766 Oil Filler Tube, designed to meet the demanding requirements of commercial truck engines.

Cummins Oil Filler Tube Part 3914766 Compatibility

The Cummins Oil Filler Tube part number 3914766 is designed to fit a variety of Cummins engines, ensuring proper oil management and maintenance. This part is integral for the oiling system, facilitating the addition of oil to the engine crankcase. Below is a detailed overview of the engines with which this oil filler tube is compatible.

Compatible Engines

• 4B3.9
• 6B5.9
• 6C8.3
• B5.9 G
• B5.9 GAS PLUS CM556
• C8.3 G
• ISB CM2150
• ISB CM550
• ISB CM850
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISBE CM2150
• ISBE4 CM850
• ISL G CM2180
• ISX CM570
• ISX CM870
• ISX CM871
• QSB4.5 CM850 (CM2850)
• QSB5.9 44 CM550
• QSB6.7 CM850 (CM2850)

Grouping of Compatible Engines

ISB Series

• ISB CM2150
• ISB CM550
• ISB CM850
• ISB6.7 CM2250
• ISB6.7 CM2350 B101

The ISB series engines are known for their reliability and performance, often used in heavy-duty applications. The oil filler tube part 3914766 ensures these engines maintain optimal oil levels.

ISBE Series

• ISBE CM2150
• ISBE4 CM850

The ISBE series engines are designed for both on-highway and off-highway applications, providing robust power and efficiency. The compatibility with part 3914766 ensures seamless oil management.

ISX Series

• ISX CM570
• ISX CM870
• ISX CM871

The ISX series engines are among Cummins’ most powerful offerings, used in various industries. The oil filler tube part 3914766 is crucial for maintaining the high performance of these engines.

QSB Series

• QSB4.5 CM850 (CM2850)
• QSB5.9 44 CM550
• QSB6.7 CM850 (CM2850)

The QSB series engines are versatile and widely used in agricultural and construction equipment. The oil filler tube part 3914766 is essential for these engines’ efficient operation.

Other Models

• 4B3.9
• 6B5.9
• 6C8.3
• B5.9 G
• B5.9 GAS PLUS CM556
• C8.3 G

These engines, while less common, still benefit from the precision and reliability of the oil filler tube part 3914766, ensuring they operate smoothly and efficiently.

Role of Part 3914766 Oil Filler Tube in Engine Systems

The Part 3914766 Oil Filler Tube is a 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. Arrangement and Oil Fill: The Oil Filler Tube is strategically positioned in the engine arrangement to allow for easy access during the oil fill process. It is typically located on the valve cover or directly on the cylinder block, depending on the engine design. This placement ensures that oil can be efficiently added to the system without spillage or contamination.

2. Valve Cover and Cylinder Block: The tube is often mounted on the valve cover, which houses the engine’s valves and camshaft. In some designs, it may be directly attached to the cylinder block. This direct connection ensures that oil flows seamlessly into the engine’s lubrication system, reaching critical components such as the crankshaft, pistons, and bearings.

3. Oil Filler Connection: The Oil Filler Tube is designed to connect with the oil filler cap, which is usually equipped with a dipstick for measuring oil levels. This connection point is vital for maintaining the correct oil level within the engine. The tube guides the oil from the filler cap into the engine, preventing leaks and ensuring that the oil reaches its intended destination.

4. Lubrication System Efficiency: By providing a dedicated pathway for oil to enter the engine, the Oil Filler Tube enhances the efficiency of the lubrication system. It ensures that oil is distributed evenly throughout the engine, reducing friction and wear on moving parts. This consistent lubrication is key to maintaining engine performance and reliability.

Conclusion

In summary, the Part 3914766 Oil Filler Tube plays a significant role in the engine’s lubrication system by facilitating the oil fill process, ensuring proper connection to critical components, and enhancing overall system efficiency. Its durable construction and compatibility with a wide range of Cummins engines make it a reliable choice for maintaining optimal engine performance and longevity.