Improving hydraulic bottle jack

[tonyfoale]

Think about it Tony, the only way oil can get to the o-ring is to leak past the ram cup. The oil is supposed to only be on the high pressure side of the ram cup. The o-ring is just a dirt & debris wiper. It does nothing to seal the oil. If there is oil on the low pressure side of the cup there's something seriously wrong with it.

No, no, no. The jack is upsidedown, The whole thing is full of oil.

[nhengineer]

No, no, no. The jack is upsidedown, The whole thing is full of oil.

Ye, I understand. Mine is also upside-down but the oil stays on the pressure side (top) of the ram cup.

[tonyfoale]

Ye, I understand. Mine is also upside-down but the oil stays on the pressure side (top) of the ram cup.

Unless I misunderstand your earlier comments, yours is a proper stand alone hydraulic ram, in which case your comments were valid. However, I thought that it was clear that I was talking about an inverted bottle jack based press as I referenced in the top post. See here http://www.homemadetools.net/forum/i...5188#post81319

However, last night I made another separate post outlining my latest modifications which essentially convert a bottle jack to a simple single cylinder style of ram, albeit with an integral pump. So now there will be no leakage unless the cup seal leaks. If that happens there will be no mess because I have incorporated a drain.
See here: http://www.homemadetools.net/forum/m...op-press-64826