Just tighten enough to stop it hitting the rail.
Garage door chain tighten.
If you find that your garage door opener chain has become loose with time you may want to tighten it up in order to remove some of that slack.
The chain is a very important component that makes up a garage door opener system.
Once you ve located it you can use a wrench to loosen the adjusting nut closest to the opener head by turning it counterclockwise.
The one you re looking for is attached to a bolt found at the spot where the trolley or carriage connects to the rail.
Adjust the chain on a garage door opener with help from a garage door spec.
There s usually a piece of rope hanging from it which is used to disengage and re engage the opener.
Replacement gear kit if you need one http amzn to 2drtdvc if you.
The trolley is responsible for pushing or pulling the opener arm along the chain so as to open and close the garage door.
Use the adjustment bolt to tighten the chain.
Thankfully garage door manufacturers have included a part in their designs that can help you tighten your chain and stop the chain from slapping against the rail as it opens and closes your garage.
Tightening your garage door chain is a simple matter of turning the right nut.
How to tighten your garage door chain.