40 plus year old floor jack can't really make out the complete name but looks to be at least American something or another anyway was my dads who passed away and while using it the jack would slowly start to go down so I thought I would bleed it, maybe add more fluid if needed ..now the jack won't pump up pass halfway and the oil looks black after adding a bit ..bled the air what seemed like 25 -30 times and still getting air bubbles out of the filler hole...time to scrap the jack or is there still hope ?