3912256
Oil Filler Tube
Cummins®

Introduction

The Cummins 3912256 Oil Filler Tube is a component designed for use in commercial trucks. It serves a specific function within the engine’s lubrication system, ensuring that the engine operates efficiently and maintains proper oil levels. This part is integral to the overall performance and maintenance of the engine, playing a significant role in the truck’s operation ².

Basic Concepts of Oil Filler Tubes

An oil filler tube is a component that facilitates the addition of oil to an engine. It is part of the lubrication system, which is vital for reducing friction between moving parts, cooling the engine, and removing contaminants ³. The oil filler tube allows for easy access to add oil, ensuring that the engine maintains the necessary lubrication for optimal performance and longevity.

Purpose of the Cummins 3912256 Oil Filler Tube

The Cummins 3912256 Oil Filler Tube is designed to play a role in the lubrication system by providing a pathway for oil to be added to the engine. It ensures that the engine maintains the correct oil levels, which is crucial for the efficient operation of the truck. By facilitating the addition of oil, this component helps in maintaining the engine’s performance and protecting it from wear and damage ³.

Key Features

The Cummins 3912256 Oil Filler Tube is constructed from high-quality materials, ensuring durability and resistance to wear. Its design includes features that enhance its performance, such as a secure fitting to prevent oil leaks and a straightforward structure that simplifies the oil addition process. These attributes contribute to the tube’s reliability and effectiveness in commercial truck applications ¹.

Benefits

Using the Cummins 3912256 Oil Filler Tube offers several benefits. It contributes to improved engine performance by ensuring consistent oil levels, which reduces friction and wear on engine components. The design of the tube makes it easy to use, simplifying the process of adding oil. Additionally, its durable construction ensures longevity, providing a reliable solution for maintaining engine lubrication ³.

Installation Process

Installing the Cummins 3912256 Oil Filler Tube requires careful attention to ensure a proper fit. The process involves removing the old tube, if present, and securing the new tube in its place using the appropriate tools. It is important to follow the manufacturer’s guidelines to ensure that the tube is correctly installed, which will help prevent oil leaks and ensure the engine receives the necessary lubrication ².

Maintenance Tips

To ensure the optimal performance of the Cummins 3912256 Oil Filler Tube, regular maintenance is recommended. This includes inspecting the tube for signs of wear or damage, ensuring that it is securely fitted, and cleaning it as necessary to prevent the accumulation of dirt or debris. Regular maintenance will help extend the life of the tube and ensure that the engine continues to operate efficiently ³.

Troubleshooting Common Issues

Common issues with oil filler tubes can include leaks, difficulty in adding oil, or damage to the tube. Troubleshooting these problems may involve checking the tube for proper fitting, ensuring that it is not damaged, and addressing any leaks promptly. Regular inspections and maintenance can help identify and resolve these issues before they lead to more significant problems ³.

Cummins Overview

Cummins Inc. is a well-established company in the commercial truck industry, known for its wide range of products and strong reputation for quality and reliability. With a history of innovation and commitment to excellence, Cummins provides solutions that meet the demanding requirements of commercial trucking, ensuring that vehicles operate efficiently and reliably ².

Cummins Oil Filler Tube Part 3912256 Compatibility

The Cummins Oil Filler Tube part number 3912256 is designed to fit a variety of Cummins engines, ensuring compatibility across multiple models. Here is a detailed breakdown of the engines that this part is compatible with:

Cummins B Series Engines

• B5.9 G
• B5.9 GAS PLUS CM556

Cummins ISB Series Engines

• ISB CM2150
• ISB CM550
• ISB CM850
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118

Cummins ISBE Series Engines

• ISBE CM2150
• ISBE CM800
• ISBE4 CM850

Cummins QSB Series Engines

• QSB4.5 CM850 (CM2850)
• QSB5.9 CM550
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

This part is engineered to ensure a proper fit and function across these engines, providing a reliable solution for maintaining the integrity of the engine’s oil system ².

Role of Part 3912256 Oil Filler Tube in Engine Systems

The oil filler tube, identified as part 3912256, is an essential component in the lubrication system of an engine. It is strategically positioned to facilitate the smooth and efficient filling of oil into the engine’s lubrication system ³.

Integration with Key Components

• Arrangement: The oil filler tube is part of a well-thought-out arrangement within the engine’s lubrication system. It is typically located on the cylinder block cover, ensuring that oil can be added directly into the crankcase. This arrangement allows for easy access during maintenance routines, ensuring that the oil level can be checked and topped up as needed.

• Oil Fill Process: During the oil fill process, the tube serves as the primary entry point for oil. It is designed to align with the oil fill cap, which is usually situated on the cylinder block cover. This alignment ensures that oil is directed into the crankcase without spillage, maintaining the cleanliness of the engine compartment.

• Cover: The cylinder block cover plays a dual role in this system. It not only houses the oil filler tube but also protects the internal components from contaminants. The cover is usually equipped with a gasket to ensure a tight seal, preventing oil leaks and maintaining the integrity of the lubrication system.

• Cylinder Block: The cylinder block is the heart of the engine, where the pistons move up and down. The oil filler tube ensures that the cylinder block receives a consistent supply of oil, which is vital for reducing friction between moving parts, cooling the engine, and carrying away contaminants.

• Cylinder Block Cover: This cover is essential for protecting the cylinder block and its components. The oil filler tube is typically mounted on this cover, allowing for easy access during oil changes or top-ups. The cover also helps in maintaining the pressure within the crankcase, which is important for the proper functioning of the engine’s lubrication system.

In summary, part 3912256 oil filler tube is a well-integrated component that ensures the efficient and clean filling of oil into the engine’s lubrication system. Its placement on the cylinder block cover and alignment with the oil fill cap are designed to facilitate easy maintenance while protecting the engine’s internal components ³.

Conclusion

The Cummins 3912256 Oil Filler Tube is a critical component in the lubrication system of commercial truck engines. Its design and construction ensure durability, ease of use, and reliable performance. Regular maintenance and proper installation are essential to maximize the benefits of this part, ensuring the engine operates efficiently and reliably. By understanding the role and integration of the oil filler tube within the engine system, truck operators and maintenance personnel can better maintain their vehicles and ensure optimal performance.