Garage door opener trolley keeps shearing off. Had it replaced a year ago, and I noticed that it is making a grinding noise and I can see it is halfway sheared off again.

Cesar Quant

• 74 Answers
• Posted on Mar 15, 2009

SOURCE: garage door opener will not work after gear replacement

check the end shaft platic cap is installed and runs freely between the rpm sensors.. that might be ur problem..

SOURCE: Sears garage door opener only open half way going up..

this one is easy...there inside your garage door opener, the one on the top of your ceiling in your garage has little like knobs ..mine has a straight like screw driver circles attached to knobs. Round dials with screw driver like knobs on top of them...they are adjustable. your "tune" them until they just stop where you want them, don't forget to grease your chain, keep your tracks clean of dust, and make sure your safety "stops" are working properly so that if children are in the way, it will stop. Also..make sure there is nothing in the way of the track. If the sensor "senses" a block...that will also cause it to stop halfway. Now if you could tell me how to change my combination on my keypad...I'm all set.

SOURCE: Garage door opener (chain) motor runs in reverse. Trolley slides forward trying to close door, even though it is closed, instead of sliding toward motor to open door. Happened out of the blue - was

Loosen the chain enough that you can remove it from the sprocket. Run the opener until the sprocket turns counterclockwise and stops. With the door in the open position replace the chain. You will probably need to adjust your open and close limits per your owners manual.

SOURCE: Sears Craftsman Garage door opener does not open or close

The drive gear is most likely stripped. It is a white nylon gear just in front of the motor. The parts number is 41A2817 and is available from Sears or any good door opener service company. It comes with instructions.

SOURCE: Craftsman garage door opener 1/2 hp will not open door

It sounds like your chain is out of sync with the limit switches. Loosen the chain enough so that you can remove it from the sprocket on top of the motor unit. Now run the opener until the sprocket runs counterclockwise and stops. Now with everything attached and the door in the open position replace and tighten the chain. You are now in sync. You may need to tweak the up and down limit controls which are on the side of the motor unit.

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