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

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Replace liftmaster 1245R drive/worm gear

My liftmaster 1245R does not work anymore. Need to replace drive/worm gear. How can I change it.

thanks,

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  • interalejo Dec 15, 2008

    Same issue as the original poster...

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I have a 1265 and took the cover off (unplug first).
There are screws securing the cover: 2 on each side at top, 2 at either end bottom.
Then I disconnected the chain.
There are 3 hex head screws securing the drive gear assembly (of course they thread from the inside out which makes taking them out a bit time consuming). Take care not to damage the circuit board or other electronic connections.
Then at the bottom of the shaft is the "limit switch assembly" that is clipped into the metal housing. Squeeze the 2 on the outside and it should swing free.
Then at the very end of the shaft there is another plastic gear. It is secured by a 3 prong plastic clip. Pull the outside clips away from the shaft while pushing the center piece back through the shaft. The gear should come off and you can now remove the gear and sprocket assembly up through the assembly.
call 800 528 2817 and order the "Gear and Sprocket Assembly".
I am waiting for the part and assume we reverse the order above to reinstall.

Posted on Dec 26, 2008

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Look at another web re how to replace a stripped gear of a garage door opener. Look at "galtrying" concerns. I have posted a quote on how I did mine with motor out. Easy as a piece of cake.

Posted on Jan 09, 2009

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1 Answer

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I think buy a new one in better choice. For its old equipment, maybe you'll hard to find compatible spare part anymore. But its your choice, if you love your door so much, and if you can find the spare part, just change the gear would be okay.

Hope this help.

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as long as the door is less than ten years old, sears will stock the part you need. you can contact them through this link.

http://www.searspartsdirect.com/partsdirect/index.action?psid=58709328&sid=PSx20071217x00001a

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