You ll need to get a replacement gear set.
Garage door gear repair.
With qualified technicians that have 13.
Just follow these steps.
Replace the cover on the garage door opener plug it back in and start enjoying your now functioning garage door opener.
Pull the chain off the motor unit sprocket and out of the chain spreader.
Several components will need to be removed to get at the gear.
Garage door opener repair or adjust for home business.
This was a craftsman model 139 53976srt.
Now you need to install the new helical gear assembly.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
It can be a complicated repair but not impossible to do yourself.
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Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley.
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With the gears back in place tighten the chain as directed in your owner s manual.
Put a thin layer of the grease included in the kit on the gear.
Slide the outer trolley away from the inner trolley.
It s one of the most common garage door opener repair problems there is.
Remove retaining screws from the cover.
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Lay the chain on the garage floor while you complete the repair.
It will take 10 minutes tops and only requires a 1 4 in.