Quki22
Well-Known Member
I noticed that after running the machine and letting it cool down, next day, the hydraulic oil level seems to drop in the sight glass. When I remove the hydraulic cooler cap to add more oil there is a slight “hiss”. After this the hydraulic oil level returns to the normal level in the sight glass. It seems as if the hydraulic system is in a state of vacuum. Is this normal? I replaced hydraulic tank breather not that long ago.