hydraulic floor jack repair

[wldavis3]

Anyone know how to repair these when they won't lift?

Use as a boat anchor?

[Normspeed]

I haven't needed to rebuild one but depending on the brand there are probably rebuild kits out there.

[1just4don]

I have heard but never tried this myself. 95% or more non working hydralic jacks can be fixed real quick, no cents other than common. (no matter the kind of them) floor, or regular jacks,,, This guy says to extend ram as far as it will go, set it on its head for a 'day'. (this lets the air filter thru the oil to the top,,,now upside down) While still upside down and out,turn screw to lower it, releases either air or oil on back side, I forget,,, MIGHT take a couple times to getter all bled but ,,,he says in excess of 95% of ALL jacks DONT need fixed,just stood on there head!!

Moral of story,,,you can buy non working jacks at auctions all day long for CHEAP!!! Fix them by setting them upside down and reselling for a profit as a working jack!!! They bring a bit more IF the grease and oil are removed and a nice coat of nice paint applied,,,then announce newly reconditioned, like, or good as new!! YOU read this here, its one of those tricks you always wished you knew, and now you DO!!! Ever notice that jacks dont work the same after they fall over(like behind the seat or in the trunk),,,its the air they get inside!!!