3930774
Oil Filler Tube
Cummins®

Introduction

The Cummins 3930774 Oil Filler Tube is a component designed for use in heavy-duty truck engines. Its primary role is to facilitate the addition of oil to the engine, ensuring that the lubrication system functions correctly. Proper lubrication is vital for the efficient operation and longevity of the engine, making the oil filler tube a significant part of the engine’s maintenance and operation ¹.

Purpose and Function

This Cummins part plays a role in the lubrication system by providing a pathway for oil to be added to the engine. It is positioned to allow for easy access during oil changes and top-ups. The tube ensures that oil is directed into the engine’s crankcase, where it lubricates moving parts, reduces friction, and helps in cooling the engine by carrying away heat. This component is integral to maintaining the engine’s performance and protecting it from wear and damage.

Key Features

The Cummins 3930774 is characterized by its robust design and high-quality material composition. It is typically made from durable materials that can withstand the high temperatures and pressures within the engine compartment. The tube is designed to be corrosion-resistant, ensuring longevity and reliable performance. Additionally, it may feature a secure fitting mechanism to prevent oil leaks and ensure a tight seal when in use.

Benefits

The use of this part offers several advantages. It contributes to improved engine lubrication, which is crucial for the smooth operation of the engine. The tube’s durable construction enhances the overall durability of the lubrication system. Furthermore, its design allows for ease of use during maintenance, enabling quick and efficient oil changes and top-ups.

Installation and Usage

Installing the Cummins 3930774 involves several steps to ensure it is correctly positioned and secured. First, the old tube, if present, should be removed carefully to avoid damaging surrounding components. The new tube should then be aligned with the engine’s oil fill port and secured in place according to the manufacturer’s instructions. It is important to ensure that the tube is properly sealed to prevent oil leaks. When adding oil, the tube should be used in conjunction with a funnel to ensure accurate and clean oil addition.

Maintenance and Troubleshooting

To maintain the Cummins 3930774, regular inspections should be conducted to check for signs of wear, corrosion, or damage. Any issues should be addressed promptly to prevent oil leaks or other complications. Common problems may include loose fittings or cracks in the tube, which can be resolved by tightening the fittings or replacing the tube if necessary. Regular maintenance of the tube contributes to the overall efficiency and reliability of the engine’s lubrication system.

Safety Considerations

When working with the Cummins 3930774, it is important to observe several safety precautions. Always ensure that the engine is cool before attempting any maintenance or installation procedures to avoid burns from hot surfaces. Use appropriate personal protective equipment, such as gloves and safety glasses, to protect against spills and debris. Additionally, dispose of used oil and filters in accordance with local environmental regulations to prevent harm to the environment.

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, reliability, and customer satisfaction in the automotive industry. The company offers a wide range of products and services designed to meet the needs of various industries, including transportation, construction, and power generation.

Compatibility

The Cummins Oil Filler Tube part number 3930774 is designed to fit seamlessly with a variety of engine models. This part is crucial for maintaining the proper oil levels and ensuring the engine operates efficiently. Here’s a breakdown of its compatibility with the specified engines:

4B3.9 and 6C8.3 Engines

The 4B3.9 and 6C8.3 engines are part of the same family and share many components, including the oil filler tube. The 3930774 part number is specifically engineered to fit these engines, ensuring a snug and secure connection. This compatibility is due to the shared design and engineering principles between these two engine models, which allows for interchangeable parts in many cases.

B4.5 Engine

The B4.5 engine, while distinct from the 4B3.9 and 6C8.3, also benefits from the use of the Cummins Oil Filler Tube part number 3930774. This part is designed to fit the B4.5 engine, providing a reliable means of checking and maintaining oil levels. The design ensures that the oil filler tube integrates smoothly with the engine’s architecture, facilitating ease of maintenance and ensuring the engine’s longevity.

By using the 3930774 oil filler tube across these engines, Cummins ensures that mechanics and operators can easily maintain their engines with a standardized part, reducing the need for multiple inventory items and simplifying the maintenance process.

Conclusion

The Cummins 3930774 Oil Filler Tube is an essential component in the arrangement of various engine systems, facilitating the smooth operation and maintenance of these systems. In the context of the oil fill system, this tube serves as the primary conduit for introducing lubricant into the engine. It is strategically positioned to allow for easy access during routine maintenance, ensuring that the oil fill process is both efficient and contamination-free. When considering the cover of the engine, the Oil Filler Tube is often integrated into the design to provide a sealed environment. This integration helps in maintaining the integrity of the engine’s lubrication system by preventing oil leaks and ensuring that the oil level is accurately monitored. In relation to the cylinder block, the Oil Filler Tube plays a supportive role by ensuring that the lubrication system is adequately supplied with oil. This is vital for the cylinder block’s components, such as the pistons and bearings, which rely on a consistent oil supply to operate smoothly and reduce wear. Overall, the Oil Filler Tube is a key element in the cohesive functioning of these engine components, contributing to the reliability and performance of the engine system.