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

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The motor is running but the chain isn't moving. Any suggestions?

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Remove the cover from the motor unit and check the drive gear. I'm sure you will find what looks like white sawdust all over and the gear will be stripped. The part number is 41A2817 and is available from Sears or any good door opener service company. It comes with instructions.

Posted on Aug 07, 2010

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There is a clutch behind the metal housing where the chain sprocket at the engine end attaches to the chain . There are wear parts with springs on them that have to be changed. ChainSaw Shed Chain Saw Parts for Wen Wagner Brand Chain Saws Chains Bars... You can get parts here.

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Check to see if the chain is moving when you apply throttle. If the chain is not moving but you can hear the motor working then it is likely the chain has come off the motor sprocket. If this is the case then follow the steps in the user manual to refit the chain and adjust the tension.

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Motor runs well but chain wont move,l it only 3 months old what next?


Make sure that you can move the chain by hand and that it is being properly oiled. Remove the bar and chain after releasing the chain brake. Clean the side of the engine where the bar fits to, then start the engine--oil should ooze out of the port. Wash out the interior of the clutch with spray carburetor cleaner to clean away excess oil accumulation. Clean the drive end of the bar small oil passages that run from the large holes out to the chain groove on each edge. If oil oozed out during the run test, reassemble everything making sure the chain teeth cut toward you on the bottom run. Adjust the chain up to the bar, but not so tight that you can't move the chain by hand. Tighten the cover fasteners and recheck the chain tension. Start the engine and run the bar tip near some cardboard--it should throw off a thin line of oil after several moments. Hope this helps!

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1 Answer

My stanley garage door opener motor runs but it won't open or close my door


If the motor runs and the chain does not then you have stripped the gears and will need to replace them. If the motor runs, the chain moves but the door does not move then the trolley is not attached or needs to be replaced. Thanks BB

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1 Answer

Garage door chain isnt engaged. motor is running


SOUNDS LIKE A BAD GEAR KIT

IF THE CHAIN MOVES BUT THE DOOR DOESN'T IT WOULD BE THE TROLLEY RELEASE. IF THE CHAIN DOESN'T MOVE IT WOULD BE THE GEAR KIT.
HOPE THIS HELPS

Jan 03, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

The motor on my Genie Chain Glide garage door operator runs but the chain does not run or move.


If the chain does not move but the motor runs then you have stripped the internal gears. I would replace here. These chain glide units are not very strong. There might be a chance the chain is telescoping down the rail but the trolley is not hooked up. Pull the red cord back toward the motor to engage. Thanks BB

Dec 29, 2009 | Genie Company Genie PowerLift Excelerator...

1 Answer

Motor runs but chain does not move?


Check the chain drive sprocket to see if it moves when the motor runs. If not, there may be a sheared key between the shaft and sprocket or the teeth on the sprocket are badly worn off. Hope this helps!

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1 Answer

Just got MCC4516F chainsaw.Used it for 30 mins. Stopped working. Chain brake does not engage or release. Chain does not move. Motor runs but will not engage to make blade move. Seems like chain brake...


You have obviously jammed or broken the chain on the inside of the motor. Take it to be repaired, or try reparing yourself by opening up the engine casing yourself.

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1 Answer

Craftsman opener motor works, but chain does not move.


If the motor is working but the chain does not move you must remove the cover on the motor and check to see that the chain is on the sprocket. If the chain is on the sprocket and the sprocket is not moving but the motor shaft is moving then the sprocket must be retightened onto the motor shaft.

Apr 20, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

Craftsman Garage Door Opener Won't Open


When mine did this, it was because the nylon gears that drive the chain had stripped. My wife had to live without the opener for a week or more, but I was able to find a new gear kit online and replace the damaged gears. It wasn't difficult.
The other option is to buy a new opener.

Dec 03, 2008 | Sears Craftsman LiftMaster Chamberlain...

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