Foaming hydaulic system
I changed my hydraulic oil last week. I moved the return line to the waist oil tank and ran one item at a time using the 24 volt pump till the oil ran clean from each item. Than i fired up the power pack and ran it till the fluid ran clean using the wing motor.
I never let the fluid get below a quarter of a tank except when i used the drain valve to remove the old oil from the tank.
After the change I went back out to sea and ran the wing motor for 30 minutes, i have ran the bow thruster in each direction for a few minutes, ran the high output bildge pump for 3 minutes (did not want to over heat with no water flow), ran the winch back and forth a few times, and ran the windless in both directions for a few minutes.
I'm still getting some foaming in the tank. I changed the oil because the last test sample came back that i had some water contamination and the viscosity was low. I will send in a new sample next time i get to port to be tested. I don't think there is a leak as the fluid level has not changed and there is no oil film in the bildges.
Anyone have any ideas?