Doser Pump 5506957 – Reliable DEF Delivery and Aftertreatment System Performance Support for Cummins Engine Systems

The Doser Pump 5506957 is designed to provide accurate Diesel Exhaust Fluid (DEF) delivery for compatible Cummins diesel engine aftertreatment systems. It transfers DEF from the tank to the dosing injector, allowing the SCR system to reduce harmful NOx emissions during engine operation. This component supports precise fluid control and helps maintain efficient emissions performance. In addition, reliable DEF supply helps improve aftertreatment system operation and reduce emission-related faults.

🔩 Specifications

• Part Number: 5506957
• Product Type: Doser Pump
• Application: For compatible Cummins diesel engine systems
• Function: Delivers DEF from the storage tank to the SCR dosing system
• Controls DEF flow for proper exhaust aftertreatment operation
• Supports SCR system efficiency and NOx reduction performance
• Helps maintain stable DEF pressure and delivery accuracy
• Suitable for compatible Cummins engine applications
• Intended for emission system repair, replacement, and maintenance procedures

⭐ Key Features

• Provides consistent DEF delivery for SCR aftertreatment systems.
• Helps maintain accurate dosing performance during engine operation.
• Supports effective NOx reduction and emission control.
• Designed to withstand vibration, temperature changes, and chemical exposure.
• Helps prevent aftertreatment faults caused by insufficient DEF supply.
• Supports reliable communication with engine emission control systems.
• Provides a practical replacement solution for damaged or worn doser pumps.

⚙️ Technical Insights

The Doser Pump 5506957 plays an important role in Cummins Selective Catalytic Reduction (SCR) systems. It transfers DEF from the tank and supplies the dosing injector with the required fluid pressure. As a result, the system can inject the correct DEF amount into the exhaust stream and support efficient NOx conversion.
In addition, doser pumps operate under continuous electrical control, fluid pressure changes, vibration, and harsh exhaust system conditions. Therefore, selecting a properly matched doser pump helps maintain accurate DEF delivery and stable emission performance. Furthermore, replacing a faulty pump can restore aftertreatment function and help resolve issues such as DEF pressure loss, emission warnings, or reduced SCR efficiency.

🛠 Application Scenarios

The Doser Pump 5506957 supports compatible Cummins diesel engines used in trucks, buses, construction equipment, agricultural machinery, generator sets, and industrial power systems. It is commonly used during SCR system repair, DEF system maintenance, emission component replacement, and diagnostic procedures.
Moreover, technicians can use this component to restore proper DEF circulation after pump failure, internal wear, contamination, or electrical faults. Likewise, maintenance teams can select suitable Cummins emission system components to maintain reliable engine operation in commercial and heavy-duty environments.

📦 Availability

Available for your Cummins engine maintenance and replacement needs.
To ensure correct fitment with your Cummins engine configuration, please provide your engine model and serial number (ESN). Our support team is ready to assist with compatibility verification and help you find the correct component solution for your equipment.