The maintenance team re-calibrated the 0R-0471 injectors through professional equipment, adjusted the injection amount to the standard range, and confirmed that the injectors were matched with the engine model. After debugging, the fuel consumption of the excavators returned to the normal level. The maintenance experts reminded that after replacing Caterpillar 0R-0471 and 0R0471 injectors, professional calibration must be carried out to ensure that the injection parameters are correct and avoid increased fuel consumption.