I have somehow acquired an old Hein-Werner 5-A bottle jack:
It leaks down when loaded, and I don't know whether it needs cylinder seals or if the valve is leaking. I'd check the level, but I don't know what the procedure is for this jack. Should the jack be upright (seems wrong, as the filler hole is near the bottom of the jack), on it side (which side up, with cylinder extended or retracted), or what.
Anyone know anything about how to go about this? Hate to trash this old workhorse.