3903035
Banjo Connector Screw
Cummins®

The 3903035 Banjo Connector Screw is a critical component manufactured by Cummins, designed for use in commercial trucks. This article provides an overview of this Cummins part, its function, key features, benefits, and maintenance suggestions.

Basic Concepts of Banjo Connector Screws

A Banjo Connector Screw is a type of fitting used in hydraulic and fuel systems to connect hoses or pipes. It typically consists of a banjo bolt, a sealing washer, and a banjo fitting. The design allows for secure and leak-proof connections, ensuring the efficient transfer of fluids under pressure ¹.

Function and Role in Truck Operation

The 3903035 plays a vital role in the hydraulic and fuel systems of commercial trucks by providing a reliable connection point for hoses and pipes. It ensures that fluids such as hydraulic oil or fuel are delivered efficiently and without leaks, contributing to the overall performance and safety of the vehicle ².

Key Features

• Constructed from high-quality materials to withstand high pressure and temperature.
• Designed for easy installation and removal.
• Features a sealing washer to prevent leaks.
• Compatible with various hydraulic and fuel system components.

Benefits

• Enhances the reliability of fluid transfer systems.
• Reduces the risk of leaks, which can lead to system failures or safety hazards.
• Designed for durability, ensuring long-term performance.
• Simplifies maintenance and repair processes.

Troubleshooting and Maintenance

Regular inspection of the Banjo Connector Screw for signs of wear or damage is recommended. If leaks are detected, the sealing washer may need to be replaced. Ensuring that the connector is properly tightened during installation can prevent common issues. Following manufacturer guidelines for maintenance can extend the lifespan of the component ³.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a strong commitment to innovation and quality, Cummins provides reliable solutions for commercial vehicles, including a wide range of components such as the 3903035.

Cummins Engine Compatibility with Part 3903035

The 3903035, a Banjo Connector Screw, is designed to fit a variety of Cummins engines. This part is integral in securing hoses and connections in the engine’s fuel and hydraulic systems. Below is a detailed breakdown of the engines that are compatible with this part:

4B3.9 and 6B5.9 Engines

The 4B3.9 and 6B5.9 engines, both part of the Cummins B Series, are medium-duty engines known for their reliability and performance. The Banjo Connector Screw is used in these engines to ensure secure connections in the fuel and hydraulic systems.

6C8.3 and B4.5 Series

The 6C8.3 engine, along with the B4.5 series (including B4.5 CM2350 B129B, B4.5 RGT, and ISB4.5 CM2350 B104), are medium-duty engines that benefit from the secure connections provided by the Banjo Connector Screw. This part is crucial for maintaining the integrity of the fuel and hydraulic lines.

B5.9 and B6.7 Series

The B5.9 and B6.7 series engines, which include models such as B5.9 CM2880 B110, B6.7 CM2250, B6.7 CM2350 B101, B6.7 CM2670 B153B, and B6.7 CM2670 B164C, are medium to heavy-duty engines. The Banjo Connector Screw is essential in these engines for securing connections in both fuel and hydraulic systems.

ISB Series

The ISB series engines, including ISB CM2150, ISB CM550, ISB CM850, ISB/ISD6.7 CM2150 SN, ISB5.9 CM2880 B110, ISB6.7 CM2250, ISB6.7 CM2350 B101, and ISBE CM2150, are designed for a range of applications from medium to heavy-duty. The Banjo Connector Screw is used to ensure secure and reliable connections in these engines.

ISC Series

The ISC series engines, such as ISC CM2150, ISC CM554, and ISC CM850, are medium-duty engines that also utilize the Banjo Connector Screw for securing hoses and connections in the fuel and hydraulic systems.

GTA855 CM558 (CM2358) G101

The GTA855 CM558 (CM2358) G101 engine, a high-performance engine, also requires the Banjo Connector Screw for secure connections in its fuel and hydraulic systems.

This part is critical in maintaining the operational integrity of these engines by ensuring that all connections are secure and leak-free.

Role of Part 3903035 Banjo Connector Screw in Engine Systems

The 3903035 is integral to the efficient operation of various engine systems. It facilitates secure connections in several key components, ensuring optimal performance and reliability.

Fuel System Integration

In the fuel system, the Banjo Connector Screw is utilized in the fuel filter assembly kit and fuel filter location. It ensures a tight seal between the fuel pump and the fuel strainer, preventing fuel leaks and maintaining consistent fuel pressure. Additionally, it plays a role in the fuel transfer pump system, where it connects the fuel pump coupling to the fuel drain plumbing. This secure connection is vital for the efficient transfer of fuel from the tank to the engine.

Turbocharger and Plumbing

For the turbocharger and its associated plumbing, the Banjo Connector Screw is employed to connect the turbocharger plumbing to the engine’s intake and exhaust systems. This ensures that the turbocharger receives the necessary airflow to operate efficiently, contributing to improved engine performance and power output.

Crankcase and Breather Systems

In the crankcase breather and crankcase breather arrangement, the Banjo Connector Screw is used to connect the breather system to the engine block. This connection allows for the release of pressure build-up within the crankcase, preventing damage to engine components and maintaining engine integrity.

Cooling and Venting Systems

The Banjo Connector Screw is also found in the engine coolant vent system, where it connects the vent to the engine block. This connection allows for the release of excess pressure from the cooling system, ensuring that the engine operates within safe temperature ranges.

Oil and Fluid Systems

In the oil system, the Banjo Connector Screw is used in the oil filler tube to ensure a secure connection for oil refilling. Additionally, it is utilized in the fluid doser system, where it connects the doser to the engine, allowing for precise fluid delivery to various engine components.

Certification and Compliance

The Banjo Connector Screw is also integral in systems requiring ISBe certification and MR certification. It ensures that all connections meet the stringent standards required for these certifications, maintaining the engine’s compliance with regulatory requirements.

Additional Applications

Beyond the primary systems, the Banjo Connector Screw is used in various other components such as the corrosion resistor location, fuel cooler, lift pump, priming pump, and kit assemblies. Each application ensures secure and reliable connections, contributing to the overall efficiency and durability of the engine systems.

Conclusion

The 3903035 Banjo Connector Screw is a vital component in the operation of Cummins engines, ensuring secure and leak-free connections in various engine systems. Its robust design, ease of installation, and compatibility with multiple engine models make it an essential part for maintaining the performance and reliability of commercial trucks.