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

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DOES DRIVE CHAIN HAVE TO BE MOUNTED TO THE HEADER WALL?

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For stability

Posted on Apr 16, 2015

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Posted on Jan 02, 2017

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


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.

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Even a brief power outage can cause amnesia in the receiver. You can try disconnecting power at the source and spending a few minutes removing the battery from the wall-mounted remote and pressing all buttons to eliminate the 'stuck button' problem. Reinstall the remote battery and reconnect main power to the unit. Test operation.
Lastly, there always is the possibility that some gremlin changed your original control setup.

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No power to wall mounted door switch need wiring diagram


Wall mounted door opener remote should get power from the main console once that is powered up. If you have wired correctly onto to the wall mounted unite and onto the main console and upon powering up the main console there is still no "life" on the wall mounted unit, I would check if there is actually any current coming it. You can easily do it with volt meter (Harbor Freight tools have a very good one for $7 or so). If no active current, call Chamberlain.

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Start procedure for chainsaw ncr 4550


The header says that this is an electric saw which doesn't have a start procedure--just push the button and it runs. Electrics also don't have a clutch because the motor doesn't need to continue running when not cutting like a fueled engine does. Most electrics, however, have a safety device that uncouples the chain drive sprocket from the drive shaft to protect the gearbox. Remove the bar and chain, then look for a broken/disconnected drive link or spring connected with the sprocket. If the shaft itself does not turn, then there is likely problems in the gearbox. Hope this helps!

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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

Motor works but does not move chain on half horse sears


Clutch? need more info.. wall mount or overhead? If it's wall mounted it could be the clutch, I don't think overheads have a clutch though. The first thing I'd do is get on a ladder and see if the chain is still attached to the sprocket... good luck

Feb 17, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a craftsman garage door opener and the chain came off the track. I've put the chain back on the track wheel but i had to loosen the chain to do so. now, when the door closes the bar bows up and the...


The reason your door is opening again is because there is a limit switch that is not making contact at the appropriate time to tell the drive to stop closing the door. The chain drive motor is controlled by a circuit that is expecting to see a signal telling it that the door is closed. If it doesn't see this signal to stop at the appropriate time, it continues to drive the door down unless it sees a certain amount of back pressure, which then tells it to return the door to the up/open position. This is a built in safety feature for most garage door drives and is industry standard now due to children getting caught under them and being killed. You can try this yourself. Stick a 4 foot 2x4 vertically under the middle bottom of the door as it's coming down, after a second or two the door will reverse direction.

With the chain falling off the drive and loosening it to replace it, you may have inadvertantly positioned the actuator of the switch, which is usually attached to the chain, out of position by a couple of links. There is a momentary contact switch mounted close to the door on the support shaft of the drive mechanism. This support shaft is the one holding the motor drive on one end, along with the chain and is anchored to the header over the garage door. This momentary switch may have a short metalic or plastic arm hanging down that is moved by the actuator on the chain and needs to be reset to a position where the switch contact will be closed when the door is in it's closed position. There are other options also depending on how new/old your door drive is. Some of the newer models use a through beam sensor or photo eye as a stop switch.

Please let me know if this helps.

Backyard_Jim

Dec 31, 2008 | Washing Machines

1 Answer

Gas boiler


hi sounds as though the system is sludged up & needs power flushing.the reason is that the water cannot circulate so over heats & pumps into the header tank.
expect to pay approx 350 400 pounds to have it properly cleansed, it will restore the system efficiency.
The other area worth considering is that it could be a faulty pump os that when th eboiler fires it cannot circulate so in turn expands & vents into the tank.

My advise is to arrange for a corgi engineer to sort it out for you.

Kindly

Richie

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