I’m not really sure how this happened to my Park Tool PFP-3, but somehow I misplaced the rubber gasket that goes between the pump shaft and the base (or maybe it fell off when I was taking it apart). No big deal, I’ve got a handful of extra rubber hose washers for my garden hose and I was able to stretch one around the pump’s shaft. The gaskets I used are TerraVerde Splash 91422 (UPC 715064914223), which seem to have some stretchiness to them.

Only one garden hose washer was needed for an excellent replacement o-ring. Park Tool shows some maintenance for the PFP-3 and watch my video for some of the repair in action.