I need someone to give me a quick rundown on the lowly bottle jack...
We have a piano dolly that uses three bottle jacks to do the lifting. One of these jacks seems to have blown it's seal.
I've never torn down or rebuilt a bottle jack so I have no idea what I may be getting into. I checked the manufacturer website, their big advice is 'send it to us' and I'll be damned if I'm gonna pay shipping for 20 lbs of bottle jack two ways on top of parts and labor.... clearly a new one would be cheaper.
Long story short I need to try and re-furb. this jack.
For those of you that are still interested in the long story here's more info.
The bottle jack in question is an Omega 10065C 6-ton hydraulic hand jack. The manufacturer's (Shinn Fu) website (http://www.shinnfu.com/) is useless, the owner's manual is useless... the jack was modified by the dolly manufacturer (they welded a washer onto the release valve to use like a thumb screw, they provided a modified padded handle and attached a Colson 6901 bumper to the top of the saddle to provide a larger/softer contact surface between the jack and the piano.


We purchased a new Craftsman 6-ton bottle jack as a quick fix but:
- the bolt holes don't line up (shocking...) and re-drilling and tapping is problematic (not impossible, just a last resort) we've got it clamped on at the moment but this is obviously a poor and temporary fix.
- if we can't repair the old jack we need to find a way to move the pad on top of the saddle of the old one to the new one which has no bolt hole to receive it. I for one am not thrilled at the prospect of trying to drill a 3/16" - 5/16" hole into a one inch diameter threaded piece of hardened steel with a heavily textured surface, especially since we don't have a drill press handy... and then of course we would still need to tap the hole... the hardened steel hole... by hand...

Basically I just want to get a comforting voice telling me it'll be ok before I crack this thing open and discover that there is some bizarre alien technology in bottle jacks that is going to transform me into a flesh eating zombie leading ultimately to the untimely demise of life on earth... And I will gladly also accept such mundane advice as 'empty the fluid before you begin' or 'don't drink the hydraulic fluid'
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