5375350
Doser Pump
Cummins®

Introduction

The Cummins 5375350 Doser Pump is a specialized component designed for use in heavy-duty trucks. It is integral to the operation of these vehicles, particularly in managing emissions. This part facilitates the precise injection of Diesel Exhaust Fluid (DEF) into the exhaust stream, which is a key process in reducing nitrogen oxides (NOx) emissions. Its role is significant in ensuring that heavy-duty trucks comply with stringent emissions regulations while maintaining efficient engine performance ¹.

Basic Concepts and Functionality

Doser pumps, including the Cummins 5375350, operate on the principle of selective catalytic reduction (SCR). This technology involves injecting DEF into the exhaust stream upstream of the SCR catalyst. The DEF decomposes into ammonia and carbon dioxide when it comes into contact with the hot exhaust gases. The ammonia then reacts with NOx in the presence of the SCR catalyst, converting them into harmless nitrogen and water vapor. The doser pump plays a role in this process by metering and delivering the DEF with precision ².

Purpose of the Cummins 5375350 Doser Pump

The Cummins 5375350 Doser Pump is specifically designed to enhance the emissions control system of heavy-duty trucks. It ensures the accurate dosing of DEF, which is crucial for the effective reduction of NOx emissions. By integrating seamlessly with the engine’s electronic control unit (ECU), the pump responds to varying engine loads and speeds, adjusting the DEF dosage to optimize emissions control without compromising engine performance ³.

Key Features

The Cummins 5375350 Doser Pump incorporates several design elements and technological advancements that contribute to its performance and reliability. It is constructed using high-quality materials that resist corrosion and wear, ensuring durability in harsh operating environments. The pump features precise metering capabilities, allowing for accurate DEF dosing. Additionally, it includes built-in diagnostics that facilitate easy monitoring and troubleshooting, enhancing its maintainability ⁴.

Benefits

The advantages of the Cummins 5375350 Doser Pump extend beyond emissions control. By effectively reducing NOx emissions, it helps trucks meet regulatory standards, avoiding potential fines and penalties. Furthermore, the pump contributes to enhanced engine performance by ensuring that the SCR system operates efficiently. This can lead to improved fuel efficiency, as the engine does not need to work harder to meet emissions targets. The pump’s reliable operation also reduces the likelihood of downtime, contributing to overall vehicle uptime and productivity.

Installation and Integration

Proper installation and integration of the Cummins 5375350 Doser Pump are vital for its effective operation. It should be installed in accordance with the manufacturer’s guidelines to ensure compatibility with the truck’s engine system. This includes verifying that the pump is correctly positioned in the exhaust stream and that all electrical connections are secure. Additionally, the pump must be integrated with the truck’s ECU to ensure that it operates in sync with the engine’s demands.

Troubleshooting and Maintenance

Common issues with the Cummins 5375350 Doser Pump may include clogging, leaks, or electrical faults. Regular maintenance practices, such as inspecting and cleaning the pump and its associated lines, can help prevent these issues. Diagnostic procedures, facilitated by the pump’s built-in diagnostics, can identify problems early, allowing for timely repairs. Adhering to the manufacturer’s maintenance schedule is crucial for ensuring the pump’s optimal performance and longevity.

Regulatory Compliance

The Cummins 5375350 Doser Pump plays a role in helping trucks meet emissions regulations and standards set by environmental and industry authorities. By effectively reducing NOx emissions, it ensures that vehicles comply with these regulations, which are designed to minimize the environmental impact of heavy-duty trucks. This compliance is not only a legal requirement but also a demonstration of a commitment to environmental stewardship.

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 has established itself as a pioneer in the automotive and engine manufacturing industry. The company’s product portfolio includes a wide range of engines and components, all designed with a focus on innovation, efficiency, and reliability. Cummins’ commitment to advancing technology and meeting the evolving needs of its customers underscores its leadership in the industry.

Compatibility with Cummins Engines

The Doser Pump 5375350, manufactured by Cummins, is designed to integrate seamlessly with a variety of Cummins engines. This part is crucial for maintaining the operational efficiency of these engines, ensuring precise dosing of fluids where required. Below is a detailed overview of its compatibility with specific engine models.

QSK19 Engines

The Doser Pump 5375350 is compatible with the QSK19 engines, specifically the QSK19 CM2350 K105 and QSK19 CM2350 K114 variants. These engines are known for their robust performance and reliability, making the Doser Pump an essential component for their smooth operation.

QSK50 Engines

For the QSK50 CM2350 K108 engine, the Doser Pump 5375350 is engineered to fit perfectly, ensuring optimal dosing of fluids. This engine variant is designed for heavy-duty applications, and the Doser Pump plays a critical role in maintaining its efficiency and longevity.

QST30 Engines

The Doser Pump 5375350 is also compatible with the QST30 CM2350 T101 engine. This engine is recognized for its versatility and power, and the Doser Pump is a key component that supports its performance by providing accurate fluid dosing.

Conclusion

The Cummins 5375350 Doser Pump is a versatile and essential component for the Cummins engines listed. Its compatibility with the QSK19, QSK50, and QST30 engine models ensures that these engines operate efficiently and reliably, maintaining their performance standards across various applications. The doser pump’s role in the aftertreatment system is critical, ensuring the effective delivery of DEF for the SCR process, which is vital for reducing emissions and maintaining compliance with regulatory standards.