This is the result of an oil pump test with hydraulic cylinder. This is amazing work with strong power. Thanks for your watching. Please click subscribe my channel.
Very nice! But your feed line is to small causing the pump to cavitate. Which is giving you air bubbles. You could try moving the feed line to the bottom of the oil tank to get some head pressure.
Please use low viscosity oil it will greatly improve your smoothness & strength if you motor has enough powered. Im Happy to have a RU-vidr like you from India your are like well engineered man