I would like to try to tune up my floor jack before giving up on it and buying a new one. It works, in that it lifts my vehicles and holds the weight with no problems, but it seems like it takes more pumps than it used to. Each pump only raises the jack about a 1/2" and the handle has to be pushed almost to the ground to get even that much.
As can be seen in the link below, there are 3 plugs associated with the cylinder:
A screw plug, covered by a clear plastic disk. I think that may be the air bleeder plug.
A hex head plug, which I believe is the fill hole.
A rubber plug in the middle of the cylinder whose purpose I do not know.
I watched 3 different videos on how to bleed a floor jack. Each one showed a different method. One said to remove just the air bleeder plug, another said to remove both the air bleeder and the fill plug and the last one said to just push the rubber plug to the side and the air will rush out. (They all said to loosen the handle and pump the jack to bleed it.)
What is the correct procedure to bleed (and possibly fill) this jack?
Thanks!