ARD head problem on Claas - Lexion 760 Cat C13 engine

When an ARD head problem occurs on a Claas Lexion 760 combine equipped with the Cat C13 engine, it can lead to major malfunctions in the emission control system. Removal of the particulate filter (DPF) and associated regenerations, as well as the definitive elimination of the use of the ARD head, are proving to be effective solutions for avoiding these recurring complications. These interventions not only improve the machine's reliability, but also optimize its performance. To achieve this objective, it is crucial to intervene directly on the Cat Adem 4 ECU. By modifying internal data, it becomes possible to implement new parameters that adjust the behavior of the CAT C13 engine. This targeted reprogramming guarantees complete and lasting optimization of mechanical operation, while avoiding the constraints associated with faulty anti-pollution systems.

Description of faults encountered in connection with the ARD head problem on Claas

3474-31 (E1026-31) - Aftertreatment Regeneration Stopped / Loss of Combustion

Symptom: Regeneration fails several times in a row, because the ARD loses combustion during the cycle.
Cause: Spark plug out of order, ARD air incorrectly metered, ARD fuel insufficient.
Why suppression works:
By suppressing the DPF and ARD, regeneration becomes unnecessary. The system no longer seeks to ignite anything. No need for ARD combustion = no code 3474-31. Regeneration management is neutralized directly in the engine file.

351-11 / 357-11 - Aftertreatment Loss of Ignition

Symptom: ARD burner won't ignite or goes out immediately.
Cause: Spark plug burnt out, ARD head clogged, filter clogged, ARD diesel pressure too low.
Why suppression works:
These codes depend solely on the ARD. By deactivating it (software and sometimes physical suppression), there is no longer any fuel injection or ignition to manage. Result: no risk of ignition error, and the codes never reappear.

3242-3 / 3242-4 - DPF Intake Gas Temp Voltage High/Low

Symptom: The temperature sensor at the DPF input gives an inconsistent voltage.
Cause: Sensor out of order, wiring damaged or gases too hot.
Why suppression works:
This sensor only serves to monitor the regeneration temperature. By suppressing the DPF, the sensor becomes useless. It is disabled or ignored by reprogramming. The system no longer reads → the code is no longer triggered.

3479-5 / 3479-6 (E1050) - Aftertreatment #1 Fuel Pressure High/Low

Symptom: The fuel pressure in the ARD line is too high or too low.
Cause: Blocked valve, clogged filter, tired ARD pump.
Why suppression works:
Suppressing the ARD system deactivates the entire fuel metering circuit (pump, valve, pressure switch). No injection is attempted, so no pressure check or error code.

Results obtained after solving the ARD head problem on a Claas

The elimination of active regenerations and the complete inhibition of the ARD head have directly eliminated aftertreatment problems on this Lexion 760. The system no longer initiates regeneration cycles or activates combustion in the ARD head, thus preventing the return of fault codes such as 3474-31 or 351-11. To guarantee a reliable physical shutdown, simply disconnect the 40-pin connector on the ARD head. This immediately restores the machine's full power, rapid acceleration response and maximum availability, with no risk of degraded mode or site interruption caused by the post-processing system.

For more information on Claas

Claas Lexion 760 vehicles often experience problems with emission control systems such as AdBlue, DPF and EGR. Although important for reducing emissions, these devices can lead to costly malfunctions and prolonged downtime. Our solution for removing these systems is the best option for ensuring optimum performance from your Claas Lexion 760. By eliminating the constraints associated with these technologies, you benefit from increased reliability and a significant reduction in maintenance costs. What's more, our expertise in engine reprogramming ensures a precise and safe intervention, tailored specifically to the needs of your farm equipment. To discover our other CAT engines engines and optimize your farming operations, consult our dedicated resources Claas