5375352
Doser Pump
Cummins®

Introduction

The Cummins 5375352 Doser Pump is a critical component in commercial trucks’ diesel engine systems, designed to inject Diesel Exhaust Fluid (DEF) into the exhaust stream to reduce nitrogen oxide (NOx) emissions. This part ensures compliance with emissions regulations and enhances the vehicle’s environmental performance.

Basic Concepts and Functionality

Doser pumps are essential for Selective Catalytic Reduction (SCR) systems in diesel engines. They meter and inject DEF into the exhaust stream upstream of the SCR catalyst, converting NOx into nitrogen and water vapor. The doser pump maintains the correct DEF dosage for the SCR system’s effective operation and emissions standards compliance ¹.

Purpose of the Cummins 5375352 Doser Pump

This Cummins part ensures the accurate delivery of DEF to the exhaust stream, enabling the SCR catalyst to function effectively. It reduces NOx emissions, helping the vehicle meet regulatory requirements and improve its environmental footprint.

Key Features

The Cummins 5375352 Doser Pump features robust construction, precise metering capabilities, and integration with the engine’s electronic control unit (ECU) for optimized operation. It minimizes DEF contamination risks and ensures consistent performance over time.

Benefits

The Cummins 5375352 Doser Pump enhances emissions control, reduces NOx emissions, and supports improved engine performance and fuel efficiency, offering economic benefits to fleet operators ².

Installation and Integration

Proper installation of the Cummins 5375352 Doser Pump requires adherence to manufacturer guidelines, including correct positioning within the exhaust system, secure mounting, and proper connection to the DEF supply and the engine’s ECU.

Troubleshooting and Maintenance

Common issues with the Cummins 5375352 Doser Pump include DEF dosage inaccuracies, pump malfunctions, or DEF system contamination. Diagnostic procedures involve checking the pump’s operation, inspecting connections and wiring, and ensuring DEF quality. Regular maintenance practices, such as cleaning the pump and its components, inspecting for wear or damage, and ensuring the DEF system is free from contaminants, are crucial for maintaining optimal performance and longevity of the pump.

Cummins Company 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 has established a reputation for innovation, quality, and reliability in the automotive and heavy-duty truck industries ³.

Compatibility with Cummins Engines

The Doser Pump 5375352 is designed to integrate seamlessly with various Cummins engines, including the QSK95, CM2350, and K113. It ensures optimal performance and reliability by providing precise dosing of urea solution in the SCR system, essential for meeting stringent emissions standards.

Role in Engine Systems

The 5375352 Doser Pump is integral to the efficient operation of engine systems, particularly in emissions control and fuel management. It ensures the consistent and correct delivery of DEF, optimizing the decomposition reactor’s efficiency and ensuring compliance with emissions regulations. Within the doser pump system, it maintains the integrity and performance of the pump, preventing issues such as clogging or insufficient dosing.

Conclusion

The Cummins 5375352 Doser Pump plays a vital role in the emissions control and performance of commercial trucks’ diesel engine systems. Its precise metering and delivery of DEF into the exhaust stream are crucial for reducing NOx emissions and ensuring compliance with environmental regulations. Proper installation, maintenance, and troubleshooting are essential for the pump’s optimal performance and longevity.