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

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GEAR END AT DOOR DOES IT HAVE TO BE MOUNTED TO HEADER WALL?

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It can be mounted to a ceiling rafter, but make sure there is room above to allow for the trolley to travel freely. If there is a clearance issue, there are top roller adapters called "quick turn brackets that make the top of the door turn faster and lower. Most likely available from your local garage door company.

Posted on Apr 19, 2015

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The wall mount that connects to the pipe broke when the chain drive began to chatter. How do I reconnect this, and should the gear drive have some give or could this be frozen.


Please consider getting a service tech. You may have to unbolt the mount, align it and put it back. There is not much give in the gear drive.

Dec 13, 2014 | Building Materials

1 Answer

Is the cross member under the load


cross members are the chassis members that tie the side frame rails together. There will be one at the front and another at the centre of the chassis and one at the rear . There is a bolt in cross member at the rear of the gear box (rear engine mount). Most modern cars are uni-construction (that is the body is complete and the front section will have a front cross member and the sub-frame rails will be bolted under the body around the front door pillars and onto the fire wall.. IN heavy vehicles there is a front cross member the carries the front engine mount another after the gear box to carry the cabin mounts and then a member every 3-4 feet to the end of the chassis rails . Their only purpose is to tie the chassis rails together.

May 03, 2014 | 1989 Chevrolet G20

1 Answer

My Chamberlain Liftmaster Formula 1 garage door opener just started going up 2 inches then stopping. If I hit either the inside wall mount or the remote in the car it just goes back down 2 inches and back...


You need to check the door springs to see if one is broken and also remove the cover from the motor unit and check the drive gear. The gear is white nylon and will be very obvious if it is bad. The part number is 41A2817 and is available at any good door service company. It will come with instructions.

Apr 03, 2011 | Sears Craftsman LiftMaster Chamberlain...

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When wall mounted opener is pushed to open you hear a buzzing sound and door wont move almost like it is binding or stuck, but chain looks clear


Remove the cover from the motor unit and check the drive gear. Sounds like it is stripped. It is a white nylon gear just in front of the motor. It is available from any good door opener service company and comes with instructions. Now is a good time to also check the door springs.

Jan 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage Door opener will not opern


2 flashes indicate safety eye issue. Check you wiring and make sure it is wired correctly and check to make sure the eyes are properly aligned.

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

2 Answers

My garage door will not stay down when I try to close it.


IF THE DOOR CLOSES ALL THE WAY WHEN HOLDING DOWN THE WALL BUTTON AND REVERSES 6" FROM THE FLOOR WHEN NOT HOLDING THE BUTTON.
I WOULD GUESS THAT THE SAFETY EYES ARE MOUNTED ON THE TRACK.
WHEN THE DOOR CLOSES THE TRACK AT THE BOTTOM IS TOO TIGHT CAUSING IT TO FLEX AS THE DOOR GETS NEAR THE BOTTOM. WHEN THE TRACK FLEXES THE EYES ARE POINTING FURTHER AWAY FROM THE DOOR AND EVENTUALLY THEY ARE TOO FAR OUT OF ALINMENT AND THE LED WILL GO OFF - THE DOOR GOES BACK UP.

SOLUTION: YOU CAN USE THE CLAW END OF A HAMMER TO TAP THE TRACK OUT A LITTLE WIDER - TAP NEXT TO THE WALL ON THE BRACKET THAT HOLDS THE TRACK TO THE WALL. MOVE THEM ABOUT 1/4" EACH SIDE.

OR

YOU CAN MOUNT THE BRACKETS TO THE WALL OR THE FLOOR.

THIS SHOULD SOLVE IT

HAVE A GREAT DAY

Dec 19, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain Liftmaster Pro. Garage door Problems closing


The sensor eye - or more likely, the other end, the sensor light - probably got knocked out of alignment. The eye should have an LED on it - possibly one that glows green when it's ready to close or red when it's obstructed or out of alignment. Try adjusting the light until the LED on the receiver glows green.

Dec 07, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Whe I push the wall mounted button the opener just hums


Sound like the "outfit" that worked on your operator did not change the bottom bushing on your motor mounting plate. Some "outfits" only change the white gear #41A2817 and some change the gear shaft assy. #41C4220A without changing the bottom bushing.

Nov 17, 2008 | Chamberlain Powerdrive PD422D 1/2 HP...

1 Answer

Liftmaster Wall Control Button not working after replacing gear


Check wiring back to unit to make sure it's not shorted or broken. You can also reset the garage door opener by unplugging it for a few minutes and plugging it back in.

Apr 25, 2008 | Sears Craftsman LiftMaster Chamberlain...

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