On Tue, May 6, 2008 at 9:12 AM, Mark Andy <mark@sccaprepared.com> wrote:
> Howdy,
>
>
> On Tue, 6 May 2008, Nolan wrote:
>
> >> I like the fast rise, but when there's some weight on the thing it seems
> >> like most of my stroke is going into make the jack make some noise, then
> >> the last little bit it raises the car a touch.
> >
> > Sounds to me like you're either low on fluid or your seals are shot.
> >
> > When the jack handle is moving down the piston is moving down, and the jack
> > should be raising for the entire stroke, not just the end of the stroke.
>If
> > the jack starts to "run out of breath" as it goes up, that's fairly
> > indicative of being low on fluid. If it does this regardless of height,
> > it's more likely a seal problem.
>
> I've been discounting "seal problem" because I've never seen any jack
> fluid on the floor... Are there seals internal to the jack that won't leak
> out fluid if they fail?
Yes. Most likely failure is the check valve in the pump, which is
intended to keep the pressurized fluid from taking the easy route back
to reservoir, and not the hard one to the lifting cylinder.
--
David Scheidt
dmscheidt@gmail.com
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