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Here are the diagrams and repair parts for Craftsman 139664420 garage door opener, as well as links to manuals and error code tables, if available.
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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.
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Showing 10 of 96 parts
Rail assembly Diagram
The manufacturer no longer makes this part, and there's no substitute part
Chassis assembly Diagram
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