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

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Hi - my craftsman door opener 1/3 hp model 41a3189 need replacement gear & sprockets. could you help me to find them . thank you. happy new year. Pierre

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Part number 41C4220A is available at Sears parts and at any good door opener service company.

Posted on Dec 31, 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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    Liftmaster Gear And Sprocket Kit 41c4220a Chamberlain ...

    www.sears.com/search=liftmaster%20gear%20and%20sprocket%20...

    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...

2 Answers

I need a gear for FCC ID : HBW1127 craftsman garage door opener 41A4315-7C, what is the part number?


This is the one you will need. Best place to buy is from Amazon if you are going to do it yourself.

http://www.amazon.com/Chamberlain-LiftMaster-Craftsman-41C4220A-Sprocket/dp/B006L8CZKI/ref=sr_1_1?ie=UTF8&qid=1424440429&sr=8-1&keywords=craftsman+gear+kit

Feb 20, 2015 | Craftsman Garage Door Opener 1/2 HP Chain...

1 Answer

Replace the gear and sprocket assembly on a garage door opener


I had to retension my spring assembly on the garage door a few years ago and I don't recommend anyone without proper tools and some experience to do it. It can be dangerous.

Nov 14, 2013 | Craftsman 1/2 HP CHain Drive Garage Door...

1 Answer

Hi The Garage Door motor runs when button is hit but the Opener Sprocket does not turn. Fixing suggestion is appreciated. Thanks Joe


It sounds like the nylon gears inside the motor unit are stripped. You might want to release the door and see if you can work it up & down easily by hand. The door lift springs may need adjusting to help the door move easily. You will need to remove the metal cover on the motor unit to see the gears and the internal components of the opener to verify the problem. It takes about 2 -3 hours and about $125 to replace those gears if you do it. I hope this helps. Please vote yes. Thank you.

Dec 07, 2010 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Stripped big gear in craftsman 1/2 hp 11 years


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

Jan 17, 2010 | 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

Craftsman 1\2 hp clicks, motor wurrs for 1 sec', but doesn't open


You have a stripped gear on the opener. Take off the cover on the motor. The bottom of the cover will be filled with white shavings. You can repair this with a "liftmaster gear and sprocket assembly".

Feb 24, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door opener hits plastic light cover


If the chain is loose, The gear and sprocket is probably worn out. To solve the immediate problem. Tighten chain until it is not loose and you need to adjust the up limit. There will be 2 screws on the side with a picture of the door, one has an arrow up and one has an arrow down. The one with the up arrow needs to be turned down. Adjust until the door opens even with the top of the door opening. You will probably have to replace the gear and sprocket in the near future.

Feb 08, 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...

2 Answers

Sears Craftsman Sprocket replacement procedure


You need a gear kit. Amazon sells them. I got mine at a Sears Service center. Beware that you will need to completely disassemble your unit to replace the gears.

http://www.amazon.com/Sears-Craftsman-Liftmaster-Garage-Opener/dp/B000JGLX9C

Mar 31, 2008 | Sears Craftsman LiftMaster Chamberlain...

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