I recently purchased 1990 JD 2155 with a 146 front end loader from a gentlemen that his father had bought it new many years ago. Currently has 3580hrs and hour meter does work. I have noticed that the front end loader and 3 point hitch jerks or is sluggish when the clutch is pressed fully down. If I let the clutch out about a third of the way or all the way out all hydraulics start functioning normally. The fluid is up to the full line and looks clean. Filter was changed recently. The man said it had done this since new. Is this normal? If not anyone have any in-site?