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

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Our Lift-Master Garage Door Opener Model 1265 Gear broke off the sprocket assembly. How hard is it to just replace the part? How is it done? Is it even worth fixing it, or should I just buy a whole new one?

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Vheuser1 is right. I ordered the gear kit (41A2817) for ~$30. Mind you, I only changed one stripped gear so the job was very easy with the right tools, nothing special. Many of my neighbors are having the same problem since our houses were built at the same time but they chose to call in repairmen.
Don't forget to adjust the 4 speed and limit settings once you're done. This was also a good opportunity for me to adjust the slack in my chain since it was hanging too low.

Posted on Jul 01, 2009

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It is easy to replace. It should take about 30 minutes to change. You will need 1/2" wrench to loosen chain and 5/16" wrench to take out screws holding in gera and sprocket assembly. You should be able to buy part for about $50. It is worth fixing most of the time.

Posted on Jan 26, 2009

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I just ordered a gear on ebay for $9.95! The store's name is A1 Accurate Garage Door Co. Here is a link to the gear page. Hope this helps!
Garage Door Opener Gears

Posted on Apr 18, 2010

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With my door closed, i push door button to open and the chain and opener continues inthe closing mode. any help?


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    Searsmore info. + -. Chamberlain LiftMaster 41C4220A Gear & Sprocket Assembly Kit. $31.40 ... Chamberlain Sears Craftsman Liftmaster 41A2817 Gear Kit. $27.65 ...

Jan 10, 2016 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My Lift Master garage door will not close. It makes the closing noise but the door does not slide down. Whcan I talk to to fix this?


Sounds like you have a chain drive garage door opener and you hear a humming sound when you push the wall console. The motor is running but the chain does not move. You need to replace the gear & sprocket assembly.

Jul 06, 2014 | liftmaster Lift Master 377LM 376LM 315 MHz...

1 Answer

I put a new gear and sproket on my sears lift master. It works, however when i press the garage door opener it goes one way for a few feet


replacing the sprocket requires the drive chain be tight and the door must be re-aligned with the timing of the lift/lower sensor. check your manual. should be done with door down. 10_19_2013_9_44_59_am.jpg

Oct 17, 2013 | Garage Doors

1 Answer

Lift-master 1265 Garage Door opener clicks but nothing happens


CHECK ON THE OPENER FOR A RESET BUTTON, IT MAY HAVE JUST POPPED.

Apr 10, 2013 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a Chamberlain 1265 Lift-Master Professional. Does that model still exist or if not, what has replaced it. Also who carries it


I know that that is a lift-master opener. chamberlain owns lift-master. but if its a new opener your looking for try the lift-master 3800 jack shaft opener. it features a low profile design that mounts next to the door instead of on the ceiling above the door, and also incorporates a battery backup so that you will never be locked out again.

Oct 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman Garage Door Opener Model# 13953919 not working.


Yes replace the entire assembly. The part number is 41C4220A Sprocket and Gear Assembly and is available at Sears or any good door opener service company. It comes with instructions.

Jun 05, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door opener motor doesn't work.


2 flashes is a safety eye issue, but you problen is most likely that the chain is not sync with the limit setting. Take the bottom off the gear and sprocket assemble and rotate center limit srew until it is in the same position as the trolley.

Jan 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Lift-master 1265 Garage Door opener


Open case, & see if white shavings from gear stripped out are laying on bottom of case.

Dec 15, 2008 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Replace liftmaster 1245R drive/worm gear


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.

Oct 23, 2008 | Sears Craftsman LiftMaster Chamberlain...

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