It seems I've sinned and blown the seals of a reckoned-to-be
10Tonnes-force hydraulic cylinder. I thought pump only with left hand and arm at full reach - couldn't overload cylinder. Apparantly not. Different pump ratings and cylinder ratings. Pump good. Ooops. I'bve posted a couple of pix. on my website, at
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to change seals - or direct me to a resource which shows how to do it? If you would... The hand-pump and cylinder proved so good that I there would be lots of tests I could use it for. So minded to go through the learning curve in order to use hydraulics better. Hence willing to put in a bit of effort, and know what to do with the seals...
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are supposedly free downloads, but I'm running behind on my monthly quota of 4G Internet.
I took the leaking cylinder to a small repair shop and asked him to identify and order the seal. I learned a lot in the process, including that the oddball seal length the aftermarket copy of a Porta Power needed wasn't available but I could re-machine the piston to accept a common one.
Your cylinder may need the shop's special tools, like spanner wrenches, cylinder hones and valve seat reamers.