It can be a complicated repair but not impossible to do yourself.
Garage door repair gear replacement.
All of our garage door opener gear kits include helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the dual speed sprocket and gears.
Insert the gear and sprocket assembly into the motor unit and install the mounting screws.
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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Keep your garage door opener up and running using garage door opener gear kits from liftmaster.
Reinstall the motor unit cover and secure it with the mounting screws.
This was a craftsman model 139 53976srt.
Several components will need to be removed to get at the gear.
With the gears back in place tighten the chain as directed in your owner s manual.
Remove retaining screws from the cover.
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Start by unplugging the motor.
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Apply grease to the helical gear.
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It s one of the most common garage door opener repair problems there is.
Push the helical gear onto the gear and sprocket assembly shaft and secure it with the retaining clip.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
You ll need to get a replacement gear set.
Garage door opener gear kits.