Cummins Adblue Pump Module Daf LF CF

The code 1409391 identifies an AdBlue (DEF) dosing pump module for SCR systems installed on DAF industrial vehicles, particularly on the LF series and some CF configurations in Euro 5 class. The unit integrates an electric pump, internal valves, and a pressure sensor, providing the reducing agent at controlled pressure to the dosing line.

Technical characteristics

• Operating voltage: 24 V.
• Type: AdBlue dosing/supply module with electric pump, internal valves, and integrated pressure sensor.
• Fluid: AdBlue (urea at 32.5%) with components compatible with crystallization and freezing/thawing cycles.
• Integrated functions: priming, pressure stabilization, recirculation to maintain the correct flow to the SCR doser.
• Interface: command and diagnostics managed by the SCR/ECM control unit via pressure/activation parameters.

DIPA can intervene to revise these modules thanks to its experience and expertise.

Functionality

• Extraction and pressurization of the reducing agent from the tank to the SCR injector.
• Control of line pressure according to the control unit maps, with temperature/viscosity compensation.
• Priming and emptying/recirculation cycles to prevent deposits and facilitate system startup.
• Diagnostic support through pressure reading and module states, with activation of derating strategies in case of anomalies.

Model applications

• DAF LF/CF

Typical defects

• Insufficient/unstable reducing pressure due to pump wear, internal crystallization, or partially clogged filter.
• Failure of the pressure sensor or valves not holding with repeated priming cycles and irregular performance.
• Electrical failures on power supplies/grounds/connectors causing module shutdown or intermittent activation.
• Leaks on fittings and pipes causing pressure drop and excessive return to the tank.
• Abnormal noise during cold startup or under cavitation conditions.

Final conclusions

The AdBlue dosing pump 1409391 is central to the reliability of the SCR system on DAF Euro 5 vehicles. The most frequent failures arise from crystallization, blockages, and sensor/valve degradation.

DIPA has a wide range of spare parts: from original ones to aftermarket options selected from the best manufacturers on the market. Not only that: it has refurbished components with performance equal to new, allowing for savings in replacement and contributing to environmental protection through the circular economy. If the spare part you need is not available, don’t worry: DIPA can revise your piece “on demand,” restoring its full functionality and safety in a short time.