Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+ "adjustable trolley" Questions

1/2 horse garage door opener doesn,t open all the way. I need about a foot more lift. The tried a trolley stops before the stop limit..Therre is no interference. I Tried adjusting the up limit to no ...

Sears garage door opener, chain adjustment The chain needs to be tightened on my ½ HP Craftsmen opener. The previous owners didn't leave a manual. thanks for any help. Loosen the inner nut on the ...

Door can be opened manually when the trolley has The garage door can be opened manually when the trolley has not been disengaged. It does require you to lift pretty hard but my second door does not do

garage door opens all the way only closes half way down I just got the chain back on but my Hi, Some of your comments look like they're missing but from what I can see you had to put chain back on and

1993 Liftmaster professional mod. 1345. Have adjusted door balance, spring tension, new safety sensors (correctly aligned). With trolley disengaged from door the trolley will run approx. 8 - 10 inch.

track rail bends when closing the door i tried to adjust the open and close limits, but the trolley keeps traveling so far that the track rail bends when the door closes completely. I adjusted the arm

Installed new worm gear, but now i cant get the door down I installed a new worm gear, and now the chain moves. According to the instructions I need to get the trolley to the closed position before I ...

how do I adjust the chain on Chamberlin 1/3hp The chain adjustment is on the trolley. Don't over tighten. Some slack is necessary.

opening theGarage door manually I disconnect the trolley to lift the garage door manually but for some reason the door only rolls back down and not stay opened. There must be something that is not ...

my 1/3 hp craftsmen door opener just hums when you hit the wall button or remotes in the car. I replaced the starter motor capacitor and nothing changed any ideas? Is the door stuck in the open ...