[AT] Hydraulic bottle jack issues

[Stephen Offiler]

They all work pretty much the same.  Follow this link to a schematic
diagram.  Seems that probably your "one-way valve" is gunked up or perhaps
damaged from overtightening or something like that.

http://cnx.org/resources/f61c398d96d1af1f33c8bf77415a54ca/graphics5.png

SO


On Wed, Jan 21, 2015 at 5:22 AM, Steve W. <swilliams268 at frontier.com> wrote:

> David Trompower wrote:
> > need your thoughts and help with this. My  old Black jack  brand,
> > hydraulic (bottle) hand jack, 12 ton model,   will  raise the ram,
> > but not retract the ram.
> >
> > 1) Opening the release valve does nothing. 2)  the weight of what I
> > have raised with the jack  will not  push the ram back down? 3)  I
> > can stand on it  and it will not retrack. 4)  if I hit  the ram  with
> > a mallet it will slowly go down, .. an 1/8 of an inch  with each blow
> > is all. 5)  Left over night with a load on the ram,  will not cause
> > the ram to be retracted by morning. 6)  I opened the filler port
> > expecting there is too much oil or excess trapped air.  but neither
> > came out?
> >
> > What is wrong? What  would you  recommend I do to fix this jack? I am
> > stumped.
> >
> >
> > R. David
> >
> >
>
> Sounds like the release valve ball is stuck or the passage is blocked. I
> would take it apart and refurbish it.
>
> --
> Steve W.
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>