I own a semi trailer with a hydraulic beavertail. It has several hydraulic cylinders and a hydraulic winch.
We run it using a hydraulic unit that we made with a Honda engine that replaced the electric motor that was on the unit originally.
It always worked great.
The oil has developed a "water in oil" condition, and with cold weather the ice crystals blocked the inlet and everything stopped working. I suspect that this is so because the trailer's hydraulics was full of water from the beginning.
We drained the oil today and I have plenty of new oil to put in. However, I want to drain the old bad oil from all cylinders.
My plan is to remove the hydraulic filter that is on the return line to the tank, connect a pipe to it that would drain into a bucket. Then we would put new oil in the tank, and operate all cylinders and motors until only clear oil comes out of the return line.
Would that give me a decent enough purge?
Anything I am missing?i