This was a craftsman model 139 53976srt.
Chamberlain garage door opener replacement gear and sprocket.
Check the manual or replacement parts diagram for specific part information before.
Includes all fasteners as pictured and installation instructions.
This gear and sprocket assembly is compatible with various chain drive garage door openers.
041c4220a is a complete chain drive gear and sprocket replacement kit.
Replacement gear and sprocket assembly compatible with chamberlain estate series chain drive garage door openers.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
Compatible with chamberlain models pd752 pd758s pd752d pd758d all models may not be listed.
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The most common issue that occurs is when the ridges in the gear wear out because the gear lubrication has evaporated.
Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears.
This gear and sprocket assembly is compatible with various chain drive garage door openers.