Zoeller M53 Mighty Mate Iron Body, Poly Base Automatic Sump Pump 1/3 HP "m267" Questions

I have a m267-f zohler sump pump when I lift the float it hums if i tip it to the side it starts working what the problem Worn out, bad bearings

hi, i have m267-f sewer pump. when i plug it in , pump blow out electrical breaker. what the problem? There may be a crack in the power wire or around the seal where cord goes into the pump.It is also