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As promised, here's the finished Sears 328.12001 rebuild ready for another 35 years of service (hopefully). I replaced all the seals and O-rings, got it reassembled, and filled up with new jack oil. And it still works! Many thanks to HiBall and everyone else on here who helped me out. Much...

Thanks to everyone for assisting so far. I'll report back. Good or bad. Rick

The top picture shows the two seals that have the right ID for the plunger shaft. You can see the plunger kind of in the second picture in the background. That's where I have the leak. There very well might not be any metal around that seal but I'm checking before I make a pile of scrap! The...

All, my first post so go easy on me! I found this thread a while ago and have read and re-read until I've started to glaze over. I have a Sears 328.12001 floor jack from my late Uncle who probably bought it new in the late 70's. It's been leaking a little by the plunger, so I asked Santa for...