| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1018.1 | Probably got bad seals | SALEM::TOWLE_C | Corky | Fri Jan 10 1992 13:34 | 21 |
| RE: <<< Note 4482.0 by CSOVAX::MILLS >>>
You probably used a type of oil that ate up the seals causing the problems
you are now expreiencing. Some hyrdaulic oils are bad news on "O" rings.
They soften, deteriorate, and eat up the "O" rings which causes all sorts of
problems.
Best thing to do is to rebuild the jack innards. Start by draining all the
oil, disassembling the innards and cleaning out all the built up crud, then
get new "O" rings and seals that will stand up to the type of oil you want to
use.
I once bought a real good hyrdaulic floor jack for a song that had the same
problems you have with yours and a teardown and rebuild did the trick. Some of
the "O" rings were so softened they had a consistency like a glue.
The original owner had used the wrong type of oil to refill it and that's
what tore up the seals.
When you get all done there should be NO air in the system at all.
|
| 1018.2 | been there too | OASS::BURDEN_D | He's no fun, he fell right over | Fri Jan 10 1992 17:52 | 13 |
| The seals may have gone bad, but the usual symptom of that is the pump
not pumping up or slowly dropping once up. Using brake fluid in a
hydraulic jack will surely kill it, but it sounds like you bought the
right stuff.
I recently rebuilt an old 3000lb Walker jack that my grandfather had.
The store that got the rebuild kit for me said it (the rebuild kit) was
30 years obsolete, but they always kept one in stock. The jack is
probably from the 30's or 40's. Works great now!
.1 still had good advice. Tear it down and see what needs replacing.
Dave
|
| 1018.3 | Did not use brake fluid | CSOVAX::MILLS | | Mon Jan 13 1992 13:17 | 13 |
| It has to be one of two things. Since it went from 1/2 working to
no working in a matter of minutes.
Like .-1 said fluid may of eaten seals (I did NOT use brake fluid)
The can (labeld HYDRAULIC JACK OIL) does not have any warning or
anything about uses/nonuses.
I still suspect I have not filled it right. Do these things self
prime/bleed. Or is there a specific procedure to filling them.
What are the two top and 1 bottom plugs for (drain and fill?).
I don't mind rebuilding it but I don't know want brand it even is.
And I suspect it will be difficult to get a kit for.
|
| 1018.4 | It's alive !!! | NICCTR::MILLS | | Sun Jan 26 1992 00:39 | 20 |
| It's alive again :-) :-). I really needed to use it bad. So I played
with it again for a while. It was acting as though the main valve was
stuck open. That is when I push down the jack went up. But when I
lifted up for the next pump it did not hold. I really didn't have the time
or patients to take the whole thing apart and if I did not fix it
quickly I was going to run out and buy a new one (which probably would
not been as good). So to "fix" it, I guessed that there might be a spec
of dirt in the valve. So I though maybe a good "gush" might dislodge
it. So I hit the pumping plugger with a hammer. And it worked !!!
To properly fill it (Many many trial and errors) I closed the "down"
valve. Opened the fill plugs. And pulled the jack to the top. Then I
put the plugs in. It now pumps all the way. 90% as good as new. What
was happening was that if I plugged it in the bottom position the
resivior created a vaccuum and would not supply fluid. If I plugged it
at the top position the pressure was always zero or positive and always
supplied fluid. The reason it's not 100% new is that the pressure is
too high when it's down and does not go quite all the way down (maybe
too much fluid and not enough room to compress air). But I'm not going
to play with it, it works :-).
|