It could be you do not have the gears in correct and the motor shaft is
locked up.

wrote in message
ups.com...
I did the plastic gear replacement on my 1/4 horse opener. This opener
I would estimate to be about 12 years old. It worked fine before I
replaced gears (except for the gears being stripped). Now when I plug
it in and hit the wall button to test it throws the breaker. The light
comes on fine, I have rechecked my blue to blue etc.. Could my
capacitor be the culprit? Thanks in advance for any help you can offer!