Place the chain around the front sprocket on the rail.
Garage door opener chain repair.
Documenting how i repaired the garage door.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
Soaking the chain in lubricant for a few hours will help loosen the rust.
The chain wraps around this sprocket as well as the gear and sprocket at the motor.
Sprocket is at the end of the opener rail closest to the garage door opening.
If your chain is badly corroded you may need to remove the chain from the carriage assembly and soak it in lubricant for a few hours.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
Remember to not over tighten the chain.
Move the ladder back under the carriage assembly.
If you are not confident in your ability to diagnose the problem call a local garage door service company.
Replacement gear kit if you need one http amzn to 2drtdvc if you.
Some openers use a smooth sprocket rather than one with teeth.
The chain got loose and popped off the gear.
To do this put some lubricant on a piece of rag this use the rag to wipe the chain.
I am not a professional.
Just tighten enough to stop it hitting the rail.