George wrote:
Mary wrote:
I'm talking about the shocks on the "stair stepper" exercise machine
but they seem to be the same as those on a car. Anyway, what causes
shocks to wear out, to lose their resistance, when there's no evidence
of fluid leakage? Thanks.

Likely the piston is plastic and it deforms or hardens.

I have a solidly built rowing machine that has that problem right now
and I can't find a replacement.

Or they're air-cushion shocks and the seals fail so lose the resistance
would more closely describe OP's symptoms...

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