Thread the nut s facing the door clockwise until it meets the bracket then release the chain.
Garage door chain adjustment.
Pull the chain toward the garage door and hold it in position.
You should have 1 2 inch of play in the chain.
If you stand at the door facing the motor you will probably see the threaded rod that adjusts the chain length on the right side of the door.
Just tighten enough to stop it hitting the rail.
Lower the garage door to take the stress off the chain.
Press down on the chain with your finger.
Usually a pair of nuts are associated with the locking mechanism while one is concerned with the adjustment of the chain.
Both adjustment types should be done with the door closed and disconnected from the opener using the emergency release.
The garage door opener loose chain or tight chain can be an easy diy.
You will have to apply a spanner to each and turn them in opposite directions.
Use the wrench to loosen the lock nuts and turn the adjustment nut to set the slack in the chain.
Chain adjusts by shortening the chain itself.
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Loosen the two lock nuts on the threaded rod.
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Adjustments on the chain are located at or near the master link where the chain engages with the cable graphic below left.
There may be an adjustment linked to the chain or an adjustment to the length of the door opener track.
A sagging chain is a result of normal usage of the garage door opener.
Remember to not over tighten the chain.
On the master link you will see two or three nuts.
The chain is a very important component that makes up a garage door opener system.
Adjust the chain on a garage door opener with help from a garage door spec.