You ll need to get a replacement gear set.
Garage door gear repair.
It can be a complicated repair but not impossible to do yourself.
Slide the outer trolley away from the inner trolley.
Now you need to install the new helical gear assembly.
Just follow these steps.
It will take 10 minutes tops and only requires a 1 4 in.
With qualified technicians that have 13.
Pull the chain off the motor unit sprocket and out of the chain spreader.
Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley.
With the gears back in place tighten the chain as directed in your owner s manual.
Lay the chain on the garage floor while you complete the repair.
Start by unplugging the motor.
Replacing a circuit board sounds like a scary garage door repair but it s really quite easy.
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Put a thin layer of the grease included in the kit on the gear.
Remove retaining screws from the cover.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
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This was a craftsman model 139 53976srt.
Remove the light cover take out the lightbulb disconnect the switch and safety sensor wires remove a few screws unplug the board and you re done.
Replace the cover on the garage door opener plug it back in and start enjoying your now functioning garage door opener.
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