Too little tension could cause the chain to skip off the sprocket and fall down on your car. Garage Door Won’t Open All the ...

Most chain drive openers suggest you tighten the chain so there’s about 1/4 in. to 1/2 in. of slack from the rail to the chain (check your manual). Over tightening the chain will put excess wear ...

The machine also slows a door in transit, preventing it from crashing to the garage floor. 2. Drive Guide: This track (aka the T-rail) guides and shields the chain, screw or belt as it moves the ...

Install a new belt-drive model and enter stealth mode when operating your garage door. Older model chain-driven garage door openers vibrate a lot and create a racket when opening and closing.