I bought a 2.5 ton hydraulic car jack and have used it for three years,
generally not for lifting cars. I used it to jack up the corner of a sagging
porch but for the last few years I've been using it to lift fallen trees so
that I could cut them with the chain saw without binding.
I tried jacking up the end of a fallen tree today and it wouldn't move. When
I pumped the handle without a load, it lifted fine, but with any application
of weight, it's useless. I tried adding more hydraulic fluid, but that
Looks like some valve or compression ring is worn out inside the pump
mechanism. There's no easy way into the unit, it seems. Unless someone knows
of a simple repair for this sort of thing, I'll just junk it and get a new
one, as they're not that expensive.
Thanks for any clues.
Sounds like the check valve is leaking back into the pump.
If it's like my cheap bottle jacks, there isn't much you can do to repair
them.. Just not worth the effort..
However before you toss it, try unscrewing the little control valve, all the
way out, or if it has a packing nut, remove it.. Becareful since there may
be a spring under a small ball valve inside.. Check that and see if there is
something in the seat..
If that doesn't help and you paid less than $10 for the jack, then just toss
it in the junk pile.. If you paid more that $25 you should try taking it
apart and repairing the pump or valve.. Without seeing the jack, I couldn't
tell you how to do that.. (mostly because I have never bothered to repair a
bottle jack other than the control valve)
Cost you, what, thirty or forty bucks to get a new one?
Moments like this you say the magic words: "I got my use out of it"
and you pitch it out. Buy a new one. And get the good one. The good one
lasts longer, and does a better job.
this is Turtle.
I use jacks some times on commercial hvac rooftop units to move them into
place and found out the following on bottle jacks and the floor jacks. The
info really just came from a place called Jacks are Us who rebuilds jack and
bottle jacks : He said any jack with the lifting power of less than 10 tons
will cost more to repair than it is worth. The rebuilding kit will be as
much as the jack cost in the first place. then i get paid to rebuild it. So
12 + ton heavy duty jack become more cost effective to fix but not really
cost effective till you get to 20+ tons of lifting power. Most all the home
movers and lifting companys buy new ones with anything 20 tons or smaller in
bottle jacks. He really only gets to fix the 30+ tons to the 200+ tons. the
commercial building contractor have to lift concrete parking lots with the
200+ ton jobs.
Floor Jacks : He said it becomes cost effective when you get to 5 tons light
weight or 3 ton heavy duty and is worth fixing but anything smaller than
that it cost more to fix than buying a new one.
So what i'm saying here is you have about about 30 cents worth of Scrap
metal at $6.00 a hundred price.
Yep. I did a bit of work in my fathers shop on these and small
engines. It is a loosing proposition to repair a small bottle jack.
It is also getting to the verge of loosing to repair a single
cyclinder gas engine unless it is a very simple problem. Parts and
time run more than it is worth.
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