Maintenance performed on a road-rail excavator following a malfunction of the proportional controls.

Diagnostic performed using the ENGCON control system interface following the appearance of an error code on the dashboard.

Observation of a loss of proportional control functionality linked to a power supply fault.

Electrical troubleshooting and identification of a missing power supply on the circuit.

Repair of the wiring with the creation of a new compliant power supply.

System recommissioning and verification of proper proportional control operation.

Parts replaced / supplied:

Electrical wiring (power supply)

Connectors and associated protection