I second the Super Lube. On the newer Twist Lock Jabscos , very easy to lube the piston by just unscrewing the top of the pump. The handle can be used to twist off the plug where the shaft goes through. Takes about 3 seconds.. (for this job, don't mess with the little screws that hold the valve top on) then lube the pump piston o-ring and a thin coat on the upper cylinder walls.. and screw the top back on..