At least lubricate this one gear in your garage door opener to make it lasts

Caution: Turn off power to your garage door opener before you work on it.
If you have a Craftsman or Chamberlain 1/2 hp chain drive garage door opener, you should lubricate this one gear every few years or it will wear out.
When it wears out, the motor will run but the door won't open.
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