All who are interested,<br/> Drained it from the rear port of the hyd pump and it would require a 1 ¼" open end wrench but I used my large Cresent and just hit it with dead blow hammer to loosen and then also to tighten. I left the fill cap on and tight to hold the oil from coming out real fast. Not sure it mattered but the oil came out slow and very controlled...