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Message: <blockquote data-quote="Tazza" data-source="post: 26786" data-attributes="member: 82">Being hydro drive, it shouldn't budge. You probably have an air lock in the pump or motors.To flush the oil, that's not so easy. I'd suggest removing the pins on the front of the lift ram, lift the arms and pull the rams back and forth with the lines open, this will remove all the oil in the rams. Same for the tilt cylinder. Drain the oil tank, swap the filter and re-fill. Even open the lines up to the drive motors when purging the oil, get as much out as you can before adding fresh oil. When you get the engine running, run it for a bit, driving around then dump the oil again.</blockquote>