I have two 6,000 lb. floor jacks that lift fine for the first couple inches and the don't go up anymore when you pump the handle. Has anyone here ever rebuilt one?
CK5
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Bad floor jack???
- Thread starter AKbigsub
- Start date
Is it enough fluid in them 
Check teh fluid. I often have to pump a ton of times to get my craftsman started, but after that, its fine.
Slightly on-topic. Fluid level first. But if fluid level is low, the seal(s) are shot.
I tried to use a bottle jack onetime that obviously had leaking seals, and not enough fluid to do what I HAD to do right then. Looked around for anything I could put in it to try and accomplish my task, found some spray silicone. Gave it a nice big shot, waited a few minutes, tried again, success.
Later on found out that silicone is a major ingredient in much of the "leak stopping" aftermarket products, and apparently by adding silicone, I had made the seals to work better. It hasn't leaked since either, been about 5 years.
Still would prefer to fix a floor jack "correctly", but if you can't get parts, might be worth a try.
I tried to use a bottle jack onetime that obviously had leaking seals, and not enough fluid to do what I HAD to do right then. Looked around for anything I could put in it to try and accomplish my task, found some spray silicone. Gave it a nice big shot, waited a few minutes, tried again, success.
Later on found out that silicone is a major ingredient in much of the "leak stopping" aftermarket products, and apparently by adding silicone, I had made the seals to work better. It hasn't leaked since either, been about 5 years.
Still would prefer to fix a floor jack "correctly", but if you can't get parts, might be worth a try.
Also, try some of that stop leak hydro fluid. Would i put it in a jack i really cared about, and didnt' want to mess up? Probably not. But for a last ditch effort before i replace a jack or cylinder, i woudl definitely try it out.
