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

Thomas O Mehrkam tmehrkam at sbcglobal.net
Wed Jan 21 16:11:55 PST 2015


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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