Also why would you fudge with mechanical so much, they are the ones that keep the lights on, they know metal working they can weld build weapons, spring loaded poo made out of scrap material etc. You close the running water and the toilets to the upper mids level that is enough to create total chaos.
Unless they are not and I think someone else is producing the steam that moves the generator and they might have another way of getting power supply to the silos.
No way the founders built the silos with zero redundancy on power supply and the biggest single point of failure ever seen in human history.