How do I replace the timer knob on Speed queen AWM351W-3062 ?

belt failing perhaps call local repair service

Speed Queen Support is your best bet 800.552.5475. There's no charge and they know their machines. They also don't sell parts so they won't try to sell you anything.

water level switch

Sounds like the bearing on the drum went bad keeping it from spinning freely.

Hi - the timer motor which turns the knob around is most likely to be faulty, unfortunately you will have to replace the timer - comes as a complete unit.
Cheers

water wont run in, whats wrong

My speedqueen do not want to spin any thing you can help me with

Its sounds like you need a replacement knob, if you can turn the disc behind it to start a cycle and the machine times out find the timer is probably still good, do a Google search for Speed Queen parts, and buy the correct replacement knob.