Bob Engelhardt fired this volley in
:

Anybody ever done it? I.e., tried to squeeze that
little bit extra lift & went too far?

And if it does leak by a seal, is it ruined?


Bob, by all rights, it must have a pressure relief valve. Almost always,
over-pressuring an o-ring seal will blow it out, resulting in a sudden
loss of pressure, and a dropping of the load.

My cheap Pep-Boys jacks have relief valves.

LLoyd