Questions & Answers for: tighten chain garage door

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Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

...tighten the outer nut on the trolley to increase tension. The outer nut on the trolley is closest to the garage door. The chain tension should be 1/2 inch off the rail at midspan. (The chain is ...

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Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

...chain will sag slightly on one side when the door is closed and on the other side when it is open. It should not sag enough that it is dragging on the T-rail. You can adjust it at the trolley. If you ...

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Question about Chamberlain Garage Door Opener Transmitter 300MC

1 Answer

...chain loosens up and literally drags (making marks), on our garage door. Is it possible that the screw adjustment is stripped and causing it loosen up or is there another adjustment/problem we should ...

Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

...tighten the chain? I think you have more problems than just a sagging chain. It is most likely sagging because the bronze bushing at the gear and sprocket assembly is bad. It lets the sprocket lean ...

Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

...tighten the chain. Some adjusting of the up and down limits will probably be required. The chain normally comes off when there is a problem with the sprocket and gear assembly. The bearing goes bad ...

Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

...tighten the chain. It sounds like you have either a broken door spring or the drive gear in the motor unit is going bad. Release the opener from the door and operate it by hand. It should be easy ...

Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

the other. When it is closing it will be just the opposite. It is important that you do not over tighten the chain. I suppose the wrong chain could be shipped with the opener but it wouldn't be common

Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

garage door opener. i need to tighten the chain, can anyone tell me how this is done? The adjustment for the chain is done at the back side of the trolley. A 1/2 inch open end wrench will do the trick

Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

...opener limit to the bottom (closed) limit. put the chain back on the gear. Loosen the set nut on the chain. Tighten the tension nut on the chain to desired tension. tighten the set nut on the

Question about Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

1 Answer

How Do I tighten the garage door chain The garage door becomes slack and needs tightening Most are a 1/2 in wrench on the trolley slide..

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