chances are you don't. The pump was not meant to be taken apart amd resealed, especially one that is 26 years old. A pump for a Kenmore that old will not be very expensive, but if you just insist on trying get you some 2 part epoxy from the automotive parts store and seal it up with that but if you have anymore trouble with it you will not be able to open it up anymore
Robby
June 2006