Have a excellent running little mini ex here we just got in showing 3,544 hrs! Doesn’t need anything at all, no leaks anywhere on the machine that we have noticed. We just replaced one of the lower track rollers on one side. This little unit has right at 21hp and weighs just 5,500lbs. Everything seems good and tight, little to no slop in the bucket as we just replaced both the mounting pins! Let us know if you have any questions/concerns.