Exercise Machine – Pneumatic/Hydraulic

I’ve got an exercise stepper machine that looks like this… I’m not positive but I think the manual variable resistant hydraulics works via air compression and not oil. It sounds like air when in use. One of them gave out recently as I was using it. The resistance no longer strengthens or weakens (it turns but the turn does not alter the resistance). I would very much like to fix or replace this if possible. […]

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