[Shop-talk] Hydraulic Jack Diagnosis

[Jeff Scarbrough]

Just trying to keep from going down the wrong rabbit hole..   On Thursday,
I think I blew up the TR6 differential.  I pulled out my handy Craftsman
3.5 ton floor jack (50145) and discovered it will not raise any weight.  It
will pump up with no load, and does not seem to creep down under the load
of my immense personal bulk.  To me, this indicates a pump problem - seals
or valves.  It is full of oil, and has worked well for the last 25 years or
so.

I found a kit that seems reputable for $30 (
https://www.hcrcnow.com/shop/seal-kits/product/8118 ) that contains all the
seals to rebuild it, but that place doesn't carry oil.  I can get any
number of different brands of jack oil locally, so I don't think that's
going to be a problem.

Any other thing I might check before I pull the trigger?
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