Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ "chain tension adjuster model" Questions

...garage door. The chain tension should be 1/2 inch off the rail at midspan. (The chain is fastened to a threaded bolt on to the trolley. The threaded bolt has an inner and outer nut). Hope this

tension on the chain of my garage door opener. Now the open and close settings are off. It closes too far and doesn't open far enough. How do I adjust this? It's a craftsman 1/3 hp and it's 15yrs old.

...tension, and the chain is sagging on the other side of the chain spreader / motor unit. Is there anyway to release the tension on the Motor unit manually? Or is there maybe another solution to my ...

...chain tension. If it still moves 6-8 inches and flashes 5 times. the problem is in the rpm sensor. Full diagnostics are in the owners manual - FREE at ...

tension on the chain, cleaning and relubing the chain . When I push the remote button to operate, I can pull on the chain and the gear will turn about a half turn then stop. The motor continues to run

...chain/gear tension and try door operation again. If it was a sync problem, the door should close closer to your limit. Adjust up and down travel as necessary to fine tune it. This worked for me so ...

...chain until the tension is removed from the trolley. Run the motor until the door is closed. While the door is closed locate the 'up limit' adjustment on the side of the motor unit and turn this 2 ...

tension by helping pull the chain a bit, the door will continue to go down. Do you know what the cause for either of these problems might be? look on the side of the openeer usually lekt looking at it

adjusted chain tension, no luck. I suspect a problem with either gears or logic board. Any ideas? Most likely is a bad IR sensor board. This is a small printed circuit board just in front of the motor

...CHAIN OF ITS TENSION, BUT IT WON'T MOVE, ANY SUGGESTIONS Release the door from the opener by pulling down on the rope. It will be very hard to pull. This should release the tension on the chain ...