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I put a new gear and sproket on my sears lift master. It works, however when i press the garage door opener it goes one way for a few feet

Do I reset something

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Replacing the sprocket requires the drive chain be tight and the door must be re-aligned with the timing of the lift/lower sensor. check your manual. should be done with door down. I put a new gear and sproket on my sears lift mast - 10_19_2013_9_44_59_am.jpg

Posted on Oct 19, 2013

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Posted on Jan 02, 2017

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SOURCE: Sear 1/2 HP Garage door opener with replaced gears

The actual problem is after power on the opener, its initial state is uncertain. It may be in ready to close or ready to open state.

If the garage door is in closed position, likely the opener will still try to close it, because its initial state is uncertain. That's why you guys see it travels 2 seconds and reverse.

In order to fix this problem, after you power on the opener, do NOT hook up the chain, and do NOT mount the sprocket cap(so you can see the sprocket travel direction). While you watch carefully at the sprocket, press trigger button on remote control or ask someone press wall control button. Make sure the sprocket turns clockwise and stop. If the sprocket turns counterclockwise, press the control button again, so it will turn clockwise. Let it finish clockwise turn. At this moment, the opener is in ready to open state.

Cover sprocket cap and hook up chain. Mount door bracket and adjust. Your door must be in close position.

You are ready to go.


Posted on Mar 07, 2009

  • 16 Answers

SOURCE: chain gear is stripped//garage door opener //lift master 1/3 hp

I made a webpage that includes the instructions that come with the gear kit. How to replace the gears, reset the travel settings, lots of pictures, part lists and numbers.
http://tinyurl.com/gearfix
cb953ba.jpg

Posted on Mar 29, 2010

  • 3197 Answers

SOURCE: My lift master security plus keyless entry pad for...

You can try programming it but first make sure the battery is good. Locate the smart/learn button on the rear of the motor unit near where all those white wires go. Press and immediately release this and then walk over to your keypad and key in any 4 digit code you like and press enter.

Posted on May 24, 2010

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1 Answer

It's not a remote part that I replaced it's the plastic gear of the garage door on the ceiling of my garage. Now it does not work. Only goes up and down 2 feet when I press the wall button in my gara




Make sure you put the black cup back on the end of the motor shaft and that it is pressed all the way on. Make sure the RPM sensor is plugged in. If neither of these are the issue, then you probably did not have the motor shaft pushed all the way back when you tightened the coupler after replacing the worm gear. Loosen that coupler up and from the front of the motor (opposite end in which the coupler is on) push the shaft back as far as it will go. Hold it there while you tighten the coupler back up and then try it.

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I have an access master door opener..it goes up about 6 inches and stops, hit switch again, goes down, hit switch again goes up about two feet, hit switch again goes down, third time switch nothing until...


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1 Answer

Hi my home have a lift master garage opner this mornig when i try to open but door open only 1 feet not full i try soooo many time but same i chek sensor but same thige


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Chance are they set there remote when you were using yours. To reset your opener you need to clear all the codes on the back of your opener itself there is a square button purple or red depends on how old it is. Press and hold that button until the LCD light turns off. Press your remote to make sure it has stopped working. Then press the button again only for a sec until the light comes on and starts to flash then press your remote button. Repeat for each remote.

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1 Answer

Chain gear is stripped//garage door opener //lift master 1/3 hp


I made a webpage that includes the instructions that come with the gear kit. How to replace the gears, reset the travel settings, lots of pictures, part lists and numbers.
http://tinyurl.com/gearfix
cb953ba.jpg

Nov 10, 2008 | Sears Craftsman LiftMaster Chamberlain...

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