yes filter has been changed. Fluid level checked at operating temp.
That is what the guy from JLG kept talking about. outside temp. as its been rather cool in Indiana so far this year. The fluid starts out at the bottom of the add sight glass. when i arrive at the location. does not seem to matter if its hot or cold. when lowering will spill over from breather cap. like i said while operating the fluid does not get foamy and it goes up smoothly. same when lowering. What could be in the tank?. this unit is at a high school and no else works on it and they don't add fluid of any kind