3687090
Air Transfer Connection
Cummins®

Introduction

The Cummins 3687090 Air Transfer Connection is a component designed for use in commercial trucks. It serves a specific function within the truck’s air system, contributing to the overall efficiency and reliability of air-operated components. Understanding its purpose and significance is key to maintaining and optimizing the performance of commercial vehicles.

Basic Concepts of Air Transfer Connection

An Air Transfer Connection facilitates the movement of compressed air within a truck’s air system. It plays a role in ensuring that air is distributed efficiently to various components that rely on air pressure, such as the brake system, suspension, and other air-operated accessories. The proper function of this connection is vital for the consistent operation of these systems ¹.

Purpose of the 3687090 Air Transfer Connection

The 3687090 Air Transfer Connection is integral to the operation of a truck’s air brake system and other air-operated components. It allows for the transfer of compressed air from the air reservoir to the brake chambers and other systems that require air pressure to function. This component ensures that air is delivered at the correct pressure and volume, contributing to the safe and effective operation of the vehicle.

Key Features

The 3687090 is characterized by its robust design and the materials used in its construction. It is built to withstand the high pressures and temperatures associated with a truck’s air system. The connection is made from durable materials that resist corrosion and wear, ensuring longevity and reliable performance. Its design may include features such as sealed connections to prevent air leaks and easy-to-use fittings for straightforward installation and maintenance.

Benefits

The use of the 3687090 can lead to improved efficiency within the air system. By ensuring a secure and leak-free connection, it helps maintain the required air pressure for optimal operation of air-operated components. This can result in enhanced reliability of the truck’s braking system and other air-dependent functions. Additionally, by reducing the likelihood of air system failures, it may contribute to cost savings for fleet operators through decreased maintenance and repair needs ².

Installation Process

Installing the 3687090 requires attention to detail to ensure a proper fit and function. The process involves disconnecting the old connection, if present, and attaching the new one using the appropriate tools. It is important to follow the manufacturer’s guidelines for torque specifications and to ensure that all connections are secure and free from leaks. Proper installation is key to the component’s performance and the overall safety of the vehicle.

Maintenance Tips

To ensure the longevity and optimal performance of the 3687090, regular maintenance is recommended. This includes periodic inspections for signs of wear or damage, checking for leaks, and ensuring that all connections remain tight. Cleaning the connection and its surrounding areas can also help prevent the buildup of dirt and debris that may affect its function.

Troubleshooting Common Issues

Common issues with the 3687090 may include air leaks, connection failures, or reduced air pressure. Troubleshooting these problems involves inspecting the connection for visible damage, checking for proper installation, and ensuring that all fittings are secure. If an issue is detected, it may be necessary to repair or replace the connection to restore the air system’s functionality.

Compatibility with Cummins Engines

This part is designed to integrate seamlessly with a variety of Cummins engine models. It plays a role in the engine’s air management system, ensuring efficient air transfer and contributing to the overall performance and reliability of the engine.

ISX12 Series

• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250

ISX15 Series

• ISX15 CM2250
• ISX15 CM2350 X101

QSX Series

• QSX11.9 CM2250 ECF
• QSX15 CM2250
• QSX15 CM2250 ECF

X12 and X15 Series

• X12 CM2350 X119B
• X15 CM2350 X116B
• X15 CM2450 X134B

ISM Series

• ISM CM570/870
• ISM CM876

ISG12 Series

• ISG12 CM2880 G107

This compatibility ensures that the Air Transfer Connection can be used across a broad spectrum of Cummins engines, providing a reliable and efficient solution for air management in these powerful and versatile engines.

Role in Engine Systems

The Air Transfer Connection (part 3687090) is integral to the efficient operation of various engine systems. It serves as a pivotal link in the air intake and exhaust pathways, ensuring seamless air flow between different components.

Air Intake System

In the air intake system, the Air Transfer Connection facilitates the transition of air from the air filter to the throttle body. This ensures that the air entering the engine is clean and metered accurately, which is essential for optimal combustion.

Turbocharger System

When integrated into a turbocharged engine, the Air Transfer Connection plays a significant role in directing compressed air from the turbocharger to the intercooler and subsequently to the intake manifold. This enhances the engine’s performance by ensuring a consistent supply of cool, dense air.

Exhaust Gas Recirculation (EGR) System

In the EGR system, the Air Transfer Connection is responsible for routing exhaust gases back into the intake stream. This helps in reducing nitrogen oxides (NOx) emissions, contributing to a cleaner and more efficient combustion process.

Positive Crankcase Ventilation (PCV) System

The Air Transfer Connection also interfaces with the PCV system, allowing crankcase gases to be effectively vented and recirculated back into the intake manifold. This prevents the buildup of harmful gases and maintains engine health.

Charge Air Cooler (CAC) System

In engines equipped with a charge air cooler, the Air Transfer Connection ensures that the hot air from the turbocharger is efficiently cooled before entering the engine. This results in improved engine efficiency and power output.

Overall Engine Performance

By ensuring smooth and regulated air flow throughout these systems, the Air Transfer Connection (part 3687090) contributes to the overall performance, efficiency, and emissions control of the engine. Its role in connecting various air pathways is essential for maintaining the engine’s operational integrity.

Conclusion

The Cummins 3687090 Air Transfer Connection is a critical component in the air management system of commercial trucks and various Cummins engines. Its robust design, compatibility with a wide range of engine models, and role in ensuring efficient air flow across multiple engine systems make it an essential part for maintaining vehicle performance and reliability. Regular maintenance and proper installation are key to maximizing the benefits of this component.