[AT] [Bulk] Re: Hydraulic bottle jack issues

[David Trompower]

ambient temp. is about 65 F. 
the ideas of 'gunk '  in the system and clogged passages, and  stuck check valves  seem  fairly good to pursue, so I will try those.   Thank you all!
it will be a couple days before I can post a progress report.  but meanwhile if other ideas come to mind please let me know. 

R. David 


> Date: Wed, 21 Jan 2015 18:11:55 -0600
> From: tmehrkam at sbcglobal.net
> To: at at lists.antique-tractor.com
> Subject: Re: [AT] [Bulk] Re:  Hydraulic bottle jack issues
> 
> How cold is it?
> 
> On 1/21/2015 7:03 AM, Stephen Offiler wrote:
> > 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.
> >> _______________________________________________
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> >>
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