only other suggestion i can give is to just drain out some of the oil.

as long as it is near the full sight glass there should be plenty of oil to operate the lift.

i had a similar problem with a combi lift and turns out the mfg put the sight glass in the wrong location on the tank when it was made.
i had 2 choices, replace the tank with a new one or just let some of the oil out till it stopped coming out of the breather.

that would be the simpilist solution imo :o)