The Cummins ISX15 and ISX12 engines, widely used in heavy-duty applications, require precise control of emissions systems to meet EPA and CARB regulations. One essential component is the Doser DEF Pump, with OEM part number 5511745, designed for model years 2018 through 2023.
This pump draws Diesel Exhaust Fluid (DEF) from the tank and supplies it under regulated pressure to the dosing valve, which injects DEF into the exhaust stream to support the Selective Catalytic Reduction (SCR) process.
Key Components and Features of OEM 5511745:
- Electric Pump Motor
- Drives fluid movement with consistent pressure output.
- Pressure Regulation System
- Ensures DEF is delivered at correct levels to the injector.
- Internal Heater Element
- Protects against freezing in cold environments.
- Temperature and Pressure Sensors
- Communicate with the ECU for accurate flow control.
- Quick-Connect Fittings
- Simplify installation and serviceability.
- Mounting Base
- Factory-configured for secure attachment and proper alignment.
The 5511745 DEF pump is engineered specifically for the emissions control needs of ISX-series engines. Routine inspection and correct DEF quality help ensure uninterrupted operation. When replacing this pump, always verify ECU compatibility and follow Cummins service guidelines to avoid system faults or diagnostic trouble codes.