Located along the rail the chain an.
How to install craftsman chain drive garage door opener.
The 3 button remote control allows you to easily program up to three garage doors and boasts a frequency range of up to 1500 ft.
The chain and cable assembly connects to the trolley and drives the trolley along the rail to raise and lower the door.
This video from sears partsdirect shows how to replace the chain and cable assembly on a chain drive garage door opener.
Chain driven garage door openers should have some slack in the chain for optimal performance.
If the chain and cable assembly breaks the door won t move.
Garage doors and the simple and straightforward installation ensures you ll be using your new opener in no time.
Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
It s built for 7 ft.