The article presents a fuel feed system for the preparation and feeding of the ethanol-fuel emulsion into the tractor diesel cylinder 4C4SS (4 cylinder 4 stroke supercharger) 11.0/12.5 (D-245.5S5). The results of testing the fuel equipment on the stand KI-22210-02M-15 have been considered. The possibility of improving the properties of fuel blends and their application in a tractor diesel has been evaluated.