I will assume you are talking about the roll around jack used in garages and the bottle jack.
Floor jack goes down by itself.
Remove the oil fill plug and look into the chamber.
I also need to put the cover on the hydro fluid reservoir.
I figure it is like bleeding brakes but don t know how to do it with a floor jack.
Try it if yours has the same symptoms it just may fix.
The jack will not even lift its arm by itself let alone the weight of an axle.
In this video i demonstrate how to remove air from your hydraulic jack and fixes it from bleeding down.
Floor jack best for general use like working on cars easier to use can get lower more stable can roll around with weight on it more stable lift platform hydraulic jack greatest weight lift also called bottle jacks greater lift potential while i have given you what.
So after using a friend s floor jack i noticed that mine behaved in a different way.
On his you can pump the jack up and wherever you leave the handle it will stay in place and will not move when weight is applied.
Can anyone explain how i can fix my floor jack so can build up pressure.
I have a 3 ton craftsman jack that i got from sears as a jack stand creeper.
The oil level should be between 3 16 to a 1 4 of an inch above the cylinder on most floor jack models.