Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Need to tighten chain on stanley model # 3220.50 Serial code 9101

A friend said that I should look for a hexagon shaped nut in the back. Couldn't find it

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IT MAY BE ON THE FRONT END OF THE RAIL.

MANY OF THESE ADJUST WHERE THE CHAIN CONNECTS TO THE TRAVELER.

DON'T MAKE IT TOO TIGHT THE BUSHING AT THE POWER END IS PROBABLY ABOUT GONE (THIS IS WHAT CAUSES THE CHAIN TO GET LOOSE) LEAVE A SAG OF ABOUT 1.5 INCHES.

ALSO START WATCHING THE ADS FOR A GOOD DEAL ONCE THE BUSHING IS GONE THE UNIT IS TOAST - PARTS ARE NOT AVAILABLE FOR MOST STANLEY UNITS.

Posted on May 29, 2010

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I'm looking for a manual for the Stanley 3220 50 or just would like to know if it has a DIP switch, and if so, where it is. Thank you.

Posted on Feb 10, 2012

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