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

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Two pulleys have come off my liftmaster 9851 garage door. how do i fix it?

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Hi. The pulleys are held in place with a bolt and a nut. Go to any hardware or home depot that has garage door parts. Take another pulley off and take the missing pieces with u. J.

Posted on Aug 01, 2010

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Posted on Jan 02, 2017

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I installed the belt of the lift master garage door opener, but it looks like it has a lock and it does not open and close correctly. How can I re-set it?


The position of the belt and the limit assembly must be synchronized to operate properly. You need to loosen the belt enough to lift it from the pulley on top of the motor and then run the motor until it runs in the clockwise direction and stops. Now with the belt connected to the door and the door closed put the belt back on the pulley and tighten. Should do it.

Apr 28, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Push the button i can hear the motor turn on but the door wont open


there mite be any thing struck in the motor belt or the pulley would be detached from the motor.. check for it......
Thanks for rating Good luck..

Jan 08, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have liftmaster garage door opener P/N 41A-5483-4. It worked normally. but all of sudden, when door closing, it reverses automatically at half way down, and garage door light bulb starts blicking 6...


Use the pull cord and disconnect the opener from the door. Operate the opener and let the carrier slide back away from the door. Is the carrier moving smoothly when disconnected? Next, lift the door by hand from the bottom to the top. Is it moving smoothly? If not, lubricate the axles of all the rollers on both sides of the door. Check the cable pulleys at the top sides of the door channel, lubricate them as well. Are all cables in all the pulleys, there are 4. After checking those things, there is a "up force" and "down force" adjustment on the opener, try increasing the "up force" by turning the adjustment in the direction of MORE force.

LiftMaster Garage Door Opener Frequently Asked Questions

Jan 02, 2011 | liftmaster Chamberlain Garage Door Opener...

1 Answer

My garage door opener motor runs but the belt does not turn, any ideas?


I would get a ladder and take a look. Be careful, things are moving up there. Maybe the drive pulley/sprocket came loose from the shaft.

Dec 27, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

GARAGE DOOR WANT CLOSE, USING CLOSER WILL MOVE A LITTLE BUT LIGHT FLASHES, SENSORS SEEM TO BE WORKING


I recommend this to everyone with garage door opener problems:
Use the pull cord and disconnect the opener from the door.
Operate the opener and let the carrier slide back away from the door. Is the carrier moving smoothly when disconnected?
Next, lift the door by hand from the bottom to the top. Is it moving smoothly?
If not, lubricate the hubs of all the rollers on both sides of the door. Check the cable pulleys at the top sides of the door channel, lubricate them as well.
Are all cables in all the pulleys, there are 4.

Dec 07, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Garage door will not stay closed. It raises


On the side of the motor unit you will find the 'down limit' control. Turn this in the opposite direction of the arrow printed on the cover. Some tweaking will probably be necessary.

Nov 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

LiftMaster 1/2hp: Key Pad Won't Work!


If you have a wireless keypad replace the battery.

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

1 Answer

Liftmaster Security Garage Door


your car remote should work even from inside the garage... if not, just take it off the visor and go outside the front door and point it at your garage to open it. This is only a quick fix. You probably need to replace the batteries in your keypad or reprogram it.

Jul 24, 2008 | Sears Craftsman LiftMaster Chamberlain...

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