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You can go at it more than one way.

:thumbup:

If you have Jerry Beranek's Fundamentals, read up on jack use there...it's the best you'll find on the subject. If you don't have the the book, get it. Get it now. :)

I dunno...maybe plumb in to the fill port on the front of the base? I don't know much about the internal works, really. Ahhh, I see Wally's post now.

I tend to be of the opinion that the 20 ton rating on that Hein-Werner is pretty conservative. It's shifted a few pretty large trees in it's time with me.

The seals in a bottle jack can be blown out, sure. If that happens in the midst of lift that requires a jack, you got problems. It's a good idea to back up any jacking situation with wedges kept tight, I think. The only reason for the springs is to ease the effort of returning the jack piston...

I have used a Hein-Werner several times over the years, always with success. But it most definitely is a ghetto arrangement when placed against a proper Silvey tree jack. No pressure gauge means two things: first, realize that you won't have any precision in feedback about how much load you're...