Kubota hydrostat fluid out of the breather

[Steelphoenix]

I have a 2000 L3710 Grand HST that suddenly started blowing all of the fluid out of the transmission breather. I mean it pours out. Everything, FEL and PTOs and drive work fine.
I changed the hydro filter and that didn't help. I did recently change all of the loader lines but that was 10 hours runtime ago.
Tractor has 780 hrs. on it.
Any help would be greatly appreciated!

 

[oldnslo]

Does the oil look foamy or is it pretty much clear oil?

Did you recently remount the fel or any other changes to hydraulic circuit before this happened?