I have a tool unclamp alarm because the 'springed piston' above the draw-bar does not reach the limit switch. See attached picture. After several minutes it will go up again. I have spayed WD40 and dry lube in the airline and it doesn't seem to make a difference. The tools also seem to have adequate clamping force (although I haven't measured)
Do I need to replace the drawbar?
Any help is much appreciated.
-Steve