This video from sears partsdirect shows how to replace the gear and sprocket assembly on a chain drive garage door opener.
Garage door opener chain broke.
Belt drive garage openers use a rubber belt to open the garage door.
It uses a chain running assembly unit attached to tension springs that lift the garage door up and down.
The gear and sprocket assembly dri.
The counterbalance spring is what lifts the garage door not the garage door opener.
This garage door opener works by moving gears and metal parts together.
You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.
If your chamberlain garage door opener trouble is a broken door spring and you pull the emergency release cord while the door is in the raised position the door could come crashing down.
Like a chain drive the belt drive operates by moving the rubber belt.
If the spring is broken the door is dead weight.
Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
For many generations people rely on this type of door opener not only because it is easy to use but also because it is cheap and can easily be repaired when broken.
Garage door is jerky when going up and down.
A garage door can be lifted but it is going to require some muscle to get it up.
A garage door opener chain may make a lot of noise when you pull it to open your door but it is one of the most reliable types of door openers ever invented.
Garage door opener is very strong and seldom does the chain actually break.
Work with the door down.
Be sure to check to see if your garage door opener offers a battery backup so you can easily access your garage if your home loses power.
Sometimes the cable will break if it is a combination chain and cable drive system.
In this case the cable can be replaced fixing the problem.
Chain driven garage door openers should have some slack in the chain for optimal performance.
We design and engineer residential garage door openers commercial door operators and gate entry systems.
That way you won t lose a finger if your unsuspecting housemate hits the remote button while you re working.