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

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How do you replace rack on liftmaster? Mine is stripped

I had the rack replaced a year ago on my garage door, because it was stripped. It cost me a hundred bucks, part was only 15 dollars. I would love to do it myself this time.

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  • pingjiyu Oct 23, 2009

    how to replace rack on liftmaster

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Why stripped again in only one year. is door balanced. lift half way and let go (Opener disconnected) and does door stay there? If it slams down, check springs.

Posted on Feb 07, 2009

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There is an antenna extender kit available for your opener. The part number is 41A3504 and should be available from any good door opener company that handles Liftmaster or Chamberlain. It should come with instructions.

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If you buy the gear kit part number 41A2817 it comes with instructions. It is available at any good door opener service company.

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The part number is 41A2817 and is available at any good door opener service company. It comes with instructions.

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Check your door springs. One of them is most likely broken and is what caused your drive gear to strip in the beginning.

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The drive gear is most likely stripped. It is a white nylon gear just in front of the motor. The parts number is 41A2817 and is available from Sears or any good door opener service company. It comes with instructions.

Jun 03, 2009 | Sears Craftsman LiftMaster Chamberlain...

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Stripped Gear on Liftmaster


how handy are you. can anyone do is a silly question. a blind person with no hands could not do. you need a socket set, hammer,screwdriver/allen wrench. kit costs $25-30 dollors. Gears will last as long as originals, not one year. It will take you 2-3 hours for a first timer. Takes me 30 minutes to rebuild unit once I take down and 20-30 minutes to reinstall, if you can change a washer or install a faucet, you can do it. what do you lose vs. what can you save.

Dec 20, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster rack keeps stripping


what do you mean by rack. do you mean fears. do you have right sprigs on door, is door balanced. lift half way and let go (Disconnected by arm). It should stay put or go slowly up or down. If not, springs are bad, I put a 1/4 hp on 18' wood door. lasted 27 years so far. H/p not the problem.

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