Singer 7462 wing head dont spin. when i tried to put in thread to the bobbin

Are you sure it needs a timing adjust? Please describe your observation of hook, needle and top thread.

Suggest you thoroughly clean the bobbin case and race area. Then lubricate the race as per instructions.

See following link for copy of a 7462 manual. Should be close enough for this purpose.

https://www.manualslib.com/manual/461365/Singer-7462.html?page=64#manual

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No idea what's causing this, although something here may help:

Why does the electronic beeper beep and the sewing machine won sew Sewing...

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Singer 7462 bobbin problem

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it's very possible that the machine could be out of time & needs to
be checked by a sewing machine technican

check to see if you put the bobbin in backwards

Unfortunatlly if it will not pick up thread, it is possibly out of time. But before you go changing the timing, make certain it is threaded correctly, the bobbin is threaded correctly. If they are all good see my tip on time a sewing machine.

You can find this in the instruction manual available here:

Singer 7462 Sewing Machine Instruction Manual

Run the thread around the little silver knob on the top of the machine to the bobbin threader on the top right. Wrap the thread clockwise around the bobbin a few times and then pull the bobbin threader toward the silver bar. If you put your hand on the crank wheel, you will feel a place for your finger to set. Push there and the center of the crank wheel will sideways allowing you to thread the bobbin when you press the pedal. I'm sure my terminology doesn't make any sense.

With the needle hitting the bobbin case , it sounds like it might be out of time. Which I am sorry to say is not an easy at-home fix.

i think you have not looped the thread around the tension on the top before putting it onto the bobbin. you need to wrap the thread in a circle around the sphere near the regualr threading lines.

Sounds like there is thread around the bobbin winder shaft and the machine is unable to continue winding, needs stripping and looking at. This is not something you should attempt yourself unless you know what you are doing. A reasonable sewing machine tech should be able to sort it out in a few minutes.