HEF - Have a Hitachi EX120-2, with what appears to be hydraulic fluid getting into swing gear oil. Is it possible it could be water? I checked the oil prior and was clean etc. about two weeks ago. I hit a tree pretty hard while swinging which I think may have caused some sort of damage, as now I see the gear oil as it now has some additional fluid in it. Any thoughts on just seals or etc.
Swing motor seal is the likely suspect.