Once you have access to the inner components of the garage door opener locate the master link the point where the chain forms a junction with the cable.
Adjusting garage door opener chain.
This video details how to adjust the opener force and travel of the door.
Garage door opener chain adjustment.
Adjust the chain on a garage door opener with help from a garage door spec.
This is where you will be working on in the next step.
What you will need two open ended spanners to fit the lock nuts.
The chain on my garage door opener seems to be sagging and rubbing on the track.
Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
Both adjustment types should be done with.
There may be an adjustment linked to the chain or an adjustment to the length of the door opener track.
The chain is a very important component that makes up a garage door opener system.
Step 4 adjusting the chain.
There are only a few ways that the chain can be tightened.
Locate the lower cover of the garage door and use the screwdriver to open it.
You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.
Chain driven garage door openers should have some slack in the chain for optimal performance.