This video from sears partsdirect shows how to replace the chain and cable assembly on a chain drive garage door opener.
How to install craftsman chain drive garage door opener.
Chain driven garage door openers should have some slack in the chain for optimal performance.
The chain and cable assembly connects to the trolley and drives the trolley along the rail to raise and lower the door.
Garage doors and the simple and straightforward installation ensures you ll be using your new opener in no time.
If the chain and cable assembly breaks the door won t move.
The hp chain drive garage door opener kit is the entry level opener that s big on value.
It s built for 7 ft.
Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.