Not sure if that helps.....I have hydraulic only up front for the snow blower. And i rigged up a hitch to move my trailers around.
Edit: You mean hydraulics to operate the trailer? Haven't had the need to do that, but don't see why it wouldn't work.
Yes. If I had a hydraulic dump trailer to pull behind mower, would the mower itself have enough fluid/pressure to operate the cylinder? Is that questioned better?