With the increasing demand for a sustainable environment free of pollution and emissions from internal combustion engines in agricultural machinery, researchers are exploring innovative methods to enhance efficiency and reduce the environmental impact of these machines. This research deals with the utilization of used hydrogen as supplementary fuel in diesel engines aiming to maximize engine efficiency and minimize emissions. This research implemented and operated in green power H₂o factory to investigates experimentally using hydrogen fuel instead of diesel fuel on a diesel engine pump set Machine. The experimental measure of the emissions percentage while using diesel and hydrogen fuel in the engine, applied, and committed by safety standards when using hydrogen fuel, the test operates at engine load between 30% to 70%. The research achieves using hydrogen instead of diesel by 100 % and an improvement in emissions when using hydrogen fuel 100 % and the prevention of carbon monoxide, carbon dioxide, and sulfur dioxide totally, Increasing the exhaust speed with increasing hydrogen pressure to 4 m/s and finally, increasing the water discharge rate when using hydrogen to 56 m³ / hr at the same engine loading.