4937931
Injector Fuel Supply Tube
Cummins®

The Injector Fuel Supply Tube, identified by part number 4937931, is a component manufactured by Cummins, a renowned name in the diesel engine industry. This part is integral to the fuel system of diesel engines, particularly in commercial trucks. Its role is to facilitate the delivery of fuel from the fuel tank to the injectors, ensuring that the engine operates efficiently and effectively ¹.

Basic Concepts of Injector Fuel Supply Tube

The Injector Fuel Supply Tube operates on the fundamental principle of delivering fuel under pressure from the fuel tank to the injectors. It is a critical component in maintaining consistent fuel pressure and flow, which are vital for the proper functioning of the fuel injection system ². The tube ensures that fuel is delivered at the correct pressure and volume, allowing the injectors to atomize the fuel properly for combustion.

Role and Operation in Truck Engines

In the context of truck engines, the Injector Fuel Supply Tube plays a significant role in ensuring that fuel is delivered to the injectors in a controlled and consistent manner. This delivery is crucial for the engine’s performance and efficiency. By maintaining the correct fuel pressure and flow, the tube contributes to the engine’s ability to produce power and operate smoothly. It also helps in reducing the risk of fuel starvation, which can lead to engine misfires or stalling ³.

Key Features

The Cummins 4937931 Injector Fuel Supply Tube is designed with several key features that enhance its performance and durability. It is constructed from high-quality materials that are resistant to corrosion and wear, ensuring a long service life. The design of the tube includes precise engineering to maintain fuel pressure and flow, and it may incorporate features such as reinforced sections to withstand the high pressures within the fuel system.

Benefits

Using the Cummins 4937931 Injector Fuel Supply Tube offers several benefits. It contributes to improved fuel efficiency by ensuring that fuel is delivered to the injectors with minimal loss of pressure or flow. This efficiency can lead to reduced fuel consumption and lower operating costs. Additionally, the tube’s reliable performance enhances engine efficiency and can contribute to lower maintenance costs by reducing the frequency of fuel system-related issues ⁴.

Troubleshooting and Maintenance

To maintain the Injector Fuel Supply Tube’s performance, it is important to follow recommended maintenance practices. Regular inspections can help identify signs of wear or damage, such as leaks or corrosion, which may indicate a failing tube. Troubleshooting common issues may involve checking for proper fuel pressure and flow, and ensuring that there are no obstructions or leaks in the fuel supply line. If issues are detected, it is advisable to replace the tube to prevent potential engine problems.

Installation Considerations

When installing the 4937931 Injector Fuel Supply Tube, it is important to consider compatibility with the specific engine model. The installation process should be carried out with the necessary tools and following the manufacturer’s guidelines to ensure a proper fit and function. Careful attention to detail during installation can help prevent future issues and ensure the tube operates as intended.

Cummins: A Brief 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 commitment to quality, Cummins has established a reputation for producing reliable and high-performance components for the diesel engine industry. The company’s focus on customer satisfaction and continuous improvement underscores its position as a leader in the field.

Cummins Injector Fuel Supply Tube (Part 4937931) Compatibility

The Cummins Injector Fuel Supply Tube (Part 4937931) is a critical component for maintaining the integrity of the fuel delivery system in various Cummins engine models. This part is designed to fit seamlessly with several engine variants, ensuring optimal performance and reliability.

Compatible Engines

• ISC CM2150
• ISC8.3 CM2250
• ISL CM2150
• ISL9 CM2250
• QSC9 CM2250/QSL9 CM2250
• QSL9 CM2250

These engines are part of Cummins’ extensive lineup, each tailored for specific applications, from heavy-duty trucks to industrial power solutions. The Injector Fuel Supply Tube is engineered to interface with the fuel injectors in these engines, ensuring that fuel is delivered efficiently and accurately.

Grouping of Compatible Engines

• ISC Series:

  • ISC CM2150
  • ISC8.3 CM2250

• ISL Series:

  • ISL CM2150
  • ISL9 CM2250

• QSC/QSL Series:

  • QSC9 CM2250/QSL9 CM2250
  • QSL9 CM2250

Each of these series represents a range of engines designed for different operational needs, from on-highway to off-highway applications. The Injector Fuel Supply Tube is compatible across these series, providing a standardized solution for maintaining the fuel delivery system’s integrity.

By ensuring that the Injector Fuel Supply Tube fits these specific engine models, Cummins maintains a high level of compatibility and ease of maintenance across its product range. This compatibility is crucial for technicians and fleet managers who rely on consistent parts to keep their engines running smoothly.

Role of Part 4937931 Injector Fuel Supply Tube in Engine Systems

The 4937931 Injector Fuel Supply Tube is a pivotal component in the fuel delivery system of various engine setups. It is specifically engineered to facilitate the precise and efficient transfer of fuel from the supply lines to the injectors.

In the context of injector plumbing, this tube ensures a seamless connection between the fuel supply and the injectors, minimizing the risk of fuel leaks and maintaining consistent fuel pressure. Its design allows for easy integration into the existing plumbing, enhancing the overall reliability of the fuel system.

When considering injector supply plumbing, the 4937931 tube plays a significant role in maintaining the integrity of the fuel supply. It helps in regulating the fuel flow to each injector, ensuring that each cylinder receives the correct amount of fuel for optimal combustion. This is particularly important in high-performance engines where fuel delivery precision can greatly impact engine efficiency and power output.

In broader plumbing applications within the engine, this tube acts as a vital link in the fuel delivery chain. It connects to various components such as fuel rails and injector manifolds, ensuring that the fuel system operates as a cohesive unit. The tube’s robust construction and precise engineering make it suitable for withstanding the high pressures and temperatures typical in modern engine environments.

For the injector itself, the 4937931 tube provides a direct and unobstructed path for fuel delivery. This direct connection minimizes fuel line resistance, allowing the injector to operate with greater efficiency. The tube’s design also aids in reducing the likelihood of fuel contamination, which can adversely affect injector performance.

In the XPI JV System Cummins MR, the 4937931 Injector Fuel Supply Tube is integral to the system’s operation. The XPI (Electronic Unit Pump) system relies on precise fuel delivery to achieve its high-pressure injection capabilities. The tube ensures that fuel is delivered to the unit pumps with minimal pressure loss, contributing to the system’s overall performance and reliability.

Overall, the 4937931 Injector Fuel Supply Tube is a key component in ensuring that the fuel delivery system operates efficiently and reliably, supporting the performance and longevity of the engine.

Conclusion

The Injector Fuel Supply Tube, part number 4937931, is a critical component in the fuel delivery system of Cummins diesel engines. Its role in maintaining consistent fuel pressure and flow is essential for the efficient operation of the engine. The tube’s design, featuring high-quality materials and precise engineering, ensures durability and reliability. Regular maintenance and proper installation are crucial for maximizing the benefits of this Cummins part, which include improved fuel efficiency and reduced maintenance costs. Compatibility with various Cummins engine models further enhances its utility in the diesel engine industry.