Today I removed the engine and hydraulic tank from the frame. After a pressure wash I was amazed just how good the engine started to look.
I was right with the fan, nearly 4 solid hours to get it off the crank, with lots of heating and penetrating fluid it eventually gave up the fight!
The good news is though, that the engine looks in pretty good condition internaly, I will probably fit a new set of rings for good measure, and regrind the valves,but that's about it.