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I have a K Mart bottle jack that I've had for years, but it didn't work since new. Just never bothered to return it. Used it, in the box, for a door stop. After reading your post about this a year or so ago, I drained and disassembled the jack, got all the nasty smelling Taiwan oil (made before trade with China was common), refilled it with some Mobile DTE24 that is used in my Dake Hydraulic press, and did the upside down trick, the jack works fine now. Acquired a 12 ton bottle jack, older one, from stuff left in a storage unit, and it was in a pan because it leaked. The seal around the release valve was bad. Found some gasoline hose that was a good tight fit inside and out, and put it in with some contact cement on the outside and then screwed the valve thru it. Seals OK but weeps a little oil that wicks thru the reinforcing threads of the hose, very slight however, keep it sitting on a rag. Mobile DTE 24 is a good choice for hydraulic jack fluid, on the shelf at Grainger. A second good choice is Mil-H-5606 Red Aircraft Hydraulic fluid, used in struts and brake systems of light aircraft. Somewhat lower viscosity than the DTE 24 but better performing in cold climates. Charles
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