3800679
Fuel Shutoff Valve Kit
Cummins®

Introduction

The Fuel Shutoff Valve Kit 3800679, produced by Cummins, is designed for commercial trucks to enhance operational safety and efficiency. This Cummins part is integral to the truck’s fuel system, ensuring a safe and effective engine shutdown ¹.

Purpose and Function

This part controls the flow of fuel to the engine, allowing for a precise and immediate cutoff of fuel supply. This function is important for safe shutdown procedures, preventing engine damage during emergencies, and ensuring the truck can be halted without risk of fire or other hazards ².

Key Features

The Fuel Shutoff Valve Kit 3800679 is known for its robust design and quality materials. It is engineered to withstand the demanding conditions of commercial truck operations. The kit includes precision-machined components for a tight seal and reliable operation, and it is designed for easy installation and integration with the truck’s existing fuel system ³.

Benefits

Using the Fuel Shutoff Valve Kit offers several advantages, including improved safety through reliable fuel cutoff, enhanced engine protection by preventing fuel system leaks, and increased operational efficiency due to precise control of fuel flow. These benefits contribute to the overall performance and longevity of the truck’s engine.

Installation and Integration

When installing the Fuel Shutoff Valve Kit, it is important to follow guidelines for compatibility with the truck’s engine type and fuel system. Professional installation is recommended to maintain the integrity of the fuel system.

Maintenance and Troubleshooting

Regular maintenance is advised to ensure the optimal performance of the Fuel Shutoff Valve Kit. This includes periodic inspections for wear or damage, checking for proper operation, and addressing any issues promptly. Common problems may include leaks or difficulty in actuating the shutoff mechanism, which can often be resolved through routine maintenance or minor repairs.

Safety Considerations

When working with the Fuel Shutoff Valve Kit, it is important to observe safety protocols. This includes proper handling of the kit components, secure storage to prevent damage, and understanding the emergency shutdown procedures. Safety data sheets and manufacturer guidelines should be consulted to ensure that all safety measures are followed.

Cummins Overview

Cummins is a company with a long-standing reputation in the commercial truck industry. It has a diverse product range that includes engines, filtration systems, and aftermarket parts. Cummins is known for its commitment to quality and innovation, which is reflected in the design and performance of products like the Fuel Shutoff Valve Kit 3800679.

Components of Cummins 3800679 Fuel Shutoff Valve Kit

The Cummins 3800679 Fuel Shutoff Valve Kit comprises several components, each playing a specific role in ensuring the proper function and reliability of the fuel shutoff valve system.

• Hexagon Flange Head Cap Screws (3900628, 3901937, 3936683): These screws secure various components within the kit. Their flanged heads provide additional surface area for torque application, ensuring a tight and secure fit.

• Clips (3907741): These clips retain or position components within the assembly, helping maintain structural integrity and alignment during operation.

• Lock Nuts (3910959): Lock nuts prevent loosening of threaded fasteners due to vibration or other dynamic forces, ensuring that connections remain secure over time.

• Banjo Fittings (3911447): Banjo fittings connect hoses or pipes in the fuel system, providing a sealed connection that allows for the transfer of fuel while withstanding pressure and vibration.

• Sealing Washers (3918192, 3963988): Sealing washers are placed between mating surfaces to create a tight seal, preventing leaks of fuel or other fluids. Their role is vital in maintaining the integrity of the fuel system.

• Mounting Spacers (3933393): These spacers provide the correct distance between components, ensuring proper alignment and function. They help in maintaining the designed clearances and tolerances within the assembly.

• Fuel Pump Solenoid (3935456): The fuel pump solenoid controls the operation of the fuel pump, enabling precise control of fuel flow, which is essential for the efficient and safe operation of the engine.

• Solenoid Brackets (3937234, 3937235, 3937236): These brackets mount the solenoid in the correct position, ensuring it is securely held in place and properly aligned with other components in the system.

Conclusion

The Fuel Shutoff Valve Kit 3800679 by Cummins is a critical component for the safe and efficient operation of commercial trucks. Its robust design, precise function, and integration with the fuel system make it an essential part for maintaining engine performance and safety.