Kioti Hydraulic Oil issue with attachment

wxtrendsguy · Aug 14, 2025

Briefly Kioti DK45 circa 2014. Rinieri vineyard hedger mounted to the front of the tractor. Hedger has long hydraulic hoses to connect to rear A/B ports on the Kioti. The implement also has a low/no pressure return line which I was told to connect to the large fill port with a Rube Goldberg assortment of reducing fittings to get it to match the fitting on the hedger hose. (hedger hose is much smaller). The issue I am having is that with this setup there is no longer an air breather which is normally built into the fill cap. The end result is the hydraulic oil is foaming up and expanding and leaking out the dip stick at a pretty good rate....take the dipstick out and it gushes when hot. The foaming of the oil obviously is not good and if I am doing something else with the tractor on a hill or something I can fell a notable decrease in tractor speed and power if its hot...obviously due to foaming. So looking for a solution...any ideas?

dodge man · Aug 14, 2025

You might post a picture of how your return line is rigged and maybe someone can come up with a better setup.

dusty3030 · Aug 14, 2025

There is a port on top of transmission case for the non pressurized return to tank line. This is where the front end loader valve’s line connects. If your tractor has the front end loader valve you can tee into it. If it doesn’t you can add the fitting into the transmission case and hook your trimmer to it.
Follow the oil fill tube down to where it connects to the case. Is there a plug right beside it? It appears to be on the parts diagrams. There is also another at 12 o’clock in front of it. One of them might be your solution and you can return your fill cap / vent to stock.