3979531
Plain Hose Coupling
Cummins®

Introduction

The Cummins 3979531 Plain Hose Coupling is a component designed for commercial truck operations, serving as a connector in fluid transfer systems. It ensures efficient operation by providing a reliable connection that can withstand heavy-duty use.

Basic Concepts of Plain Hose Couplings

Plain hose couplings join two hoses or a hose to a fitting without clamps or additional fasteners. They operate on the principle of compression, creating a seal that prevents leaks. These couplings are widely used in fluid transfer systems for their simplicity, ease of use, and effectiveness in creating secure connections ¹.

Purpose of the Cummins 3979531 Plain Hose Coupling

This Cummins part connects hoses within the truck’s fluid systems, including those for coolant, fuel, and other essential fluids. It ensures efficient and leak-proof fluid transfer, contributing to the truck’s overall performance and reliability ².

Key Features

The 3979531 is constructed from high-quality, corrosion-resistant materials, ensuring longevity under demanding conditions. Its design allows for easy installation and removal, and its compression fitting mechanism ensures a tight seal that prevents leaks.

Benefits

Advantages of using this part include ease of installation, reducing downtime during maintenance. Its reliable performance ensures consistent fluid transfer, contributing to the efficiency of the truck’s systems. The coupling’s design also allows for quick disconnection and reconnection, facilitating easier maintenance and repair processes.

Installation and Usage

Proper installation involves ensuring hoses are clean and free from debris. The coupling should be tightened according to the manufacturer’s specifications to ensure a secure seal. It is used in coolant, fuel, and hydraulic systems within commercial trucks.

Troubleshooting and Maintenance

Common issues with plain hose couplings include leaks, which may be caused by improper installation, wear and tear, or damage. Regular inspection and maintenance can help identify and address these issues before they lead to more significant problems. Signs that a coupling may need replacement include visible damage, persistent leaks, or difficulty in achieving a secure connection ³.

Safety Considerations

When installing, maintaining, or replacing the Cummins 3979531 Plain Hose Coupling, it is important to observe safety guidelines to prevent injury and ensure the safe operation of the truck. This includes wearing appropriate personal protective equipment, ensuring that the truck is turned off and the system is depressurized before beginning work, and following all manufacturer instructions for installation and maintenance.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins is committed to quality, innovation, and customer satisfaction. The company’s extensive product range includes engines and components for on-highway, off-highway, and stationary applications, demonstrating its versatility and expertise in the automotive industry.

Cummins Engine Compatibility with Plain Hose Coupling Part 3979531

The Cummins Plain Hose Coupling part number 3979531 is designed to fit various Cummins engine models, ensuring secure and leak-free connections between hoses and engine components.

ISB Series Engines

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

ISBE and ISBE4 Series Engines

• ISBE CM2150
• ISBE4 CM850

QSB Series Engines

• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB6.7 CM2250
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

This compatibility ensures that the Plain Hose Coupling part 3979531 can be used across a wide range of Cummins engines, providing a reliable and secure connection for critical engine systems.

Role of Part 3979531 Plain Hose Coupling in Engine Systems

The 3979531 Plain Hose Coupling is an essential component in various engine systems, facilitating the secure and efficient connection of hoses to different parts of the engine.

Plumbing System Integration

In the plumbing system of an engine, the Plain Hose Coupling ensures a reliable connection between hoses that transport fluids such as coolant, oil, or fuel. This connection is vital for the continuous circulation of these fluids, which is necessary for the engine’s lubrication, cooling, and overall operation.

Cabin Heater System Functionality

Within the cabin heater system, the Plain Hose Coupling plays a significant role in connecting hoses that carry hot coolant from the engine to the heater core. This connection is fundamental for the transfer of heat, which is then used to warm the cabin.

In both applications, the Plain Hose Coupling demonstrates its importance in maintaining the integrity and efficiency of engine systems. Its role in facilitating secure connections and enabling easy maintenance underscores its value in the overall operation and longevity of these systems.

Conclusion

The Cummins 3979531 Plain Hose Coupling is a critical component in commercial truck operations, ensuring secure and efficient fluid transfer across various engine systems. Its design, compatibility with a wide range of Cummins engines, and the benefits it offers in terms of installation, maintenance, and performance make it an invaluable part for ensuring the reliability and efficiency of truck operations.