You should be able to slacken the chain by loosening the nuts put the chain back on then retighten the chain.
Chain comes off garage door opener.
My garage door opener has a threaded rod attached to the chain.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
If you find that your garage door opener chain falls off the track on which it has been placed you will need to put it back up and then tighten the chain to stop this happening in the future.
The chain got loose and popped off the gear.
Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.
If you are outside the door when this occurs you will need some assistance to move the door manually.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
Chain driven garage door openers should have some slack in the chain for optimal performance.
Pricing chain drives tower over belt drives in terms of affordability since they are inexpensive and readily available in any market.
Opener systems can develop a number of problems including electronic problems with remote control units chain slippage faulty roller action and cables that come off the pulley system.
Keep it propped open while you fix the chain.
It has 2 stop nuts that hold the chain in place and adjusts the tension on the chain.
I loosened the nuts to allow me to put it back on tightened it back up and now the door goes down but comes 1 3 of the way up again.
Documenting how i repaired the garage door.
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This garage door opener has a powerful dc motor with geniesense technology standard.
I am not a professional.
I had a chain come off the sprocket on my chamberlain garage door opener.
Then comes the second important part it has along railing through which the chain drive will run off the garage door opener.