Replacing seals in hydraulic cylinders - jacks, hoists, presses

Had a large floor jack that started bleeding out. Most these days are imports so you'll not likely find a kit. Anyway, I took the cylinder apart (uber big socket and 3/4" impact) and removed the piston o-ring. A hydraulic shop had one with just the right ID, OD, and thickness - at least close enough. Reassembled and has not leaked a drop since. Cheaper than buying a new one.

See here: www.hyjacks.com/H7.HTM