Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Chain should be approximately 1/4 inch above the bottom of the rail. If you over tighten the chain will make a clicking noise when the opener runs. This is not good.
Posted on Dec 28, 2010
Testimonial: "Thank you for your answer. I will adjust it to that tightness. Carl Benson"
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Posted on Jan 02, 2017
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