There should be one or two nuts at each side of the anchor.
Garage door chain off sprocket.
Pull the chain off the motor unit sprocket and out of the chain spreader.
The reason the chain went off track was because the chain.
After close examination we found the chain was off track.
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.
Remove the outer nut and lock washer from the trolley threaded shaft and pull the threaded shaft out of the trolley.
When the garage door goes off track it can be a serious inconvenience.
Another common cause for a loose chain could be the front sprocket breaking.
Lay the chain on the garage floor while you complete the repair.
To reinstall the chain on the sprocket first with the door closed pull the rope hanging down from the trolley on the t bar.
2 move the ladder to the outer end of the chain arm near the garage door.
Sprocket is at the end of the opener rail closest to the garage door opening.
Use a screwdriver to remove the snap on cover where the chain wraps around the sprocket at the upper side of the motor.
There are lots of tutorials on the internet for our to put the chain back on but all of them assume that there is some sort of tension adjuster with two lock nuts on it my chain.
Drill through the sprocket and shaft and install a bolt hardened bolt if needed through the shaft.
A new front sprocket costs.
Around this sprocket as well as the gear and sprocket at the motor.
This will release the door from the garage door opener.
Can be used on tube shafts.
This sprocket is typically used on a soled keyed garage door shaft.
Slide the outer trolley away from the inner trolley.
The chain is attached to a threaded rod that is attached to the trolley.
While calibrating the safety reverse on one of my garage door openers the chain this is a chain drive opener hopped off of the sprocket on the garage door opener.
When used on tube shafts it is advisable to fill the tube shaft with a steel or wood dowel in the area of the sprocket and through bolt the sprocket.
This will loosen the chain and give you more slack to place the chain back over the sprockets.
Turn the nut s facing the opener motor one half turn clockwise by hand.
