3420805
Pressure Relief Valve
Cummins®

Introduction

The Cummins 3420805 Pressure Relief Valve is engineered to maintain system integrity in commercial trucks by regulating pressure levels. It ensures that the pressure within a system does not exceed safe operational limits, thereby protecting other components from potential damage due to excessive pressure.

Basic Concepts of Pressure Relief Valves

A Pressure Relief Valve is a safety device that automatically releases excess pressure from a system to prevent damage. It functions by opening when the pressure exceeds a predetermined set point and closing once the pressure has been reduced to a safe level. This mechanism is vital in various systems to maintain operational safety and efficiency ¹.

Purpose of the Cummins 3420805 Pressure Relief Valve

The Cummins 3420805 is specifically designed to play a role in the pressure management of truck systems. It is integrated into systems where pressure regulation is necessary to ensure the longevity and reliability of the components. By addressing conditions of excessive pressure, it helps maintain the optimal performance of the truck’s systems.

Key Features

This Cummins part is characterized by its robust design, which includes precision-machined components and high-quality materials that ensure durability and reliable performance. Its design allows for accurate pressure regulation, and it features a straightforward construction that facilitates easy installation and maintenance.

Benefits

The incorporation of the Cummins 3420805 into truck systems offers several advantages. It contributes to improved system reliability by preventing damage from pressure spikes. Additionally, it enhances safety by ensuring that pressure levels remain within safe operational limits. Efficient operation of the valve can also lead to potential cost savings by reducing the need for repairs and replacements of other system components ².

Installation and Integration

Proper installation of the Cummins 3420805 is crucial for its effective operation. It should be installed according to the manufacturer’s guidelines, ensuring that all connections are secure and that the valve is correctly oriented within the system. Consideration should be given to the system’s specific requirements to ensure optimal performance.

Troubleshooting and Maintenance

Regular maintenance of the Cummins 3420805 is important to ensure its longevity and efficient operation. This includes checking for signs of wear or damage, ensuring that all connections are tight, and verifying that the valve operates within the specified pressure range. Troubleshooting common issues may involve checking for obstructions, verifying the set pressure, and ensuring that the valve is free from contaminants.

Common Applications

The Cummins 3420805 is commonly used in various commercial truck systems where pressure regulation is necessary. It is found in applications such as fuel systems, hydraulic systems, and other pressurized systems within the truck. Its use is widespread across different truck models, contributing to the overall reliability and safety of these vehicles.

Safety Considerations

When working with the Cummins 3420805, it is important to follow safety protocols to prevent injury or damage. This includes ensuring that the system is depressurized before beginning any work, using appropriate personal protective equipment, and adhering to all manufacturer guidelines for handling and maintenance.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes a wide range of power solutions. With a history of innovation and a reputation for producing high-quality components, Cummins is recognized for its expertise in the automotive industry. The company’s commitment to quality and performance is evident in its products, including the 3420805.

Compatibility with Cummins Engines

The Pressure Relief Valve, part number 3420805, manufactured by Cummins, is a critical component in the hydraulic systems of various engines. This part is designed to maintain system pressure within safe limits by diverting excess fluid back to the reservoir, thereby preventing potential damage due to overpressure.

Compatibility with Specific Engine Models

QSV81G, QSV91G, QSW/QSV82, QSW27, QSW36, and QSW73

The Pressure Relief Valve 3420805 is compatible with the following engines:

• QSV81G
• QSV91G
• QSW/QSV82
• QSW27
• QSW36
• QSW73

These engines share similar hydraulic system requirements, making the 3420805 part a suitable fit for maintaining optimal system pressure.

QSV91-G4 CM558/CM700 V102

While the Pressure Relief Valve 3420805 is not explicitly listed for the QSV91-G4 CM558/CM700 V102 engine, it is advisable to consult with Cummins or an authorized dealer to confirm compatibility. Given the similarity in design and function across Cummins engines, it is likely that this part can be used, but verification is recommended to ensure proper fit and function.

General Considerations

When installing the Pressure Relief Valve 3420805, it is essential to follow the manufacturer’s guidelines to ensure proper installation and functionality. This includes checking for any specific torque settings, alignment requirements, and ensuring that the valve is compatible with the engine’s hydraulic fluid specifications. Proper installation will help maintain the integrity of the hydraulic system and extend the lifespan of the engine components.

Role of Part 3420805 Pressure Relief Valve in Engine Systems

The Part 3420805 is an essential component within various engine systems, ensuring optimal performance and protection. It is integrated into the following components:

• Assy, LOM Fee and Assy, LOM FWE: Within these assemblies, the Pressure Relief Valve helps manage the pressure levels, preventing excessive pressure build-up that could damage the system.

• Cooler: The valve is part of the cooler system, where it regulates the pressure of the engine oil as it circulates through the cooler, maintaining efficient heat exchange.

• Engine Oil and Filter Systems: In conjunction with the full flow oil filter and lubricating oil filter, the valve ensures that the oil pressure remains within safe limits, protecting the filter media from damage due to overpressure.

• Filter Assembly Housing and Filter Head Assembly Cover: These components house the Pressure Relief Valve, which plays a role in safeguarding the integrity of the housing and cover by relieving excess pressure.

• Filter Housing and Full Flow Assembly Filter: The valve is incorporated into the filter housing to manage pressure variations, ensuring consistent filtration efficiency and prolonging the life of the filter assembly.

• Lubricating Oil Assembly and Lubricating Oil Module Assembly: Within these assemblies, the Pressure Relief Valve helps maintain the pressure of the lubricating oil, ensuring smooth operation and protection of the moving parts within the engine.

• Oil Filter Assembly Housing: The valve is an integral part of the oil filter assembly housing, where it helps in maintaining the pressure balance, thereby enhancing the overall efficiency of the oil filtration process.

Conclusion

In summary, the Part 3420805 Pressure Relief Valve is a key component in various engine systems, providing essential pressure management to ensure the longevity and efficiency of the engine and its associated components.