Good Job. But it's very surprise you are testing vacuum pump without water , that can damage both mechanical seal and even if there is no water we can judge all assambley fitting is correct or not . means water leakage will identify vacuum pressure will goes down or not .. Even i want to see how you dismantle both impeller with shaft.
Ahí dice bomba de vacio, no es bomba de agua,las bombas de vacio tienen diferentes aplicaciones, desde refrigeradores,cámaras de frio,industria alimentaria,etc😊
