[Shop-talk] Hydraulic Jack Diagnosis

[Pat Horne]

Jeff, I’d try opening the valve & then pull the saddle up & let it go down a green times. Sometimes that will move crud away from wherever it is causing the problem. If that doesn’t work just take the pump apart to see how the seals & bore look. Can’t hurt. 

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On May 22, 2022, at 1:04 PM, Jeff Scarbrough <fishplate at gmail.com> wrote:


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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