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Hi Don,
Most jacks I've seen have a fill plug on the side, sometimes it
is a rubber plug sometimes a screw. You lay the jack on the side
and make the fill point the higest spot. Use a small funnel
(never again to be used for food)or a piece of wire (14 gauge
platinum should work ; )) to trickle the fluid in. You can buy
hydraulic press fluid at some auto supply places, in a pinch
brake fluid will work but try to find the right stuff.
It could be the release valve is clogged too - is the jack
springy when you push down on it? That usually indicates air
(which compresses), if it is not springy then it could be the
valve is clogged and needs to be taken apart and cleaned.
Sometimes the ram will stick a bit too, usually a few up down
cycles fixes that (got a car handy?).
Also on another tangent - has anyone ever experimented with
hydrostatic and explosive forming (not nearly as dramatic as it
sounds)? We did a bit of work in these areas in tech school
(manufacturing not jewellery but the ideas are the same) if
anyone is interested. Tends to form metal without introducing
stresses associated with die forming.
Cameron Speedie
Island Gem and Rock
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