This was a craftsman model 139 53976srt.
Garage door repair gear replacement.
Garage door opener gear kits.
We offer a full line of services including garage door spring repair opener replacement installation maintenance.
Several components will need to be removed to get at the gear.
You ll need to get a replacement gear set.
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Apply grease to the helical gear.
It can be a complicated repair but not impossible to do yourself.
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.
Start by unplugging the motor.
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Remove retaining screws from the cover.
Push the helical gear onto the gear and sprocket assembly shaft and secure it with the retaining clip.
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.
It s one of the most common garage door opener repair problems there is.
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This is a video on how to change the gear sprockets in a craftsman garage door opener.
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.
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Insert the gear and sprocket assembly into the motor unit and install the mounting screws.