Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Pull straight down on the rope and release. Then you should be able to run the opener and the two halves of the trolley will click together. Sometimes you need move the door by hand to get this done. The grinding noise is most likely the drive gear stripping. Remove the cover from the motor unit and it should be obvious.
Posted on Oct 04, 2010
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Posted on Jan 02, 2017
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