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Each system (car) has some variances but that is essentially correct.
NOW, with that said....
If you are sure you have set the bypass properly, the bypass plunger ball on the pump may be so corroded that it will not depress and route the hydraulic oil around the pump so you can manually move the top.
If this is the case, sorry... In any event, you need a new pump and properly seal it up when installing it.
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