Fixing Sears Craftsman (LiftMaster) Garage Door Opener–Stripped Gears


How to replace stripped gears in your Sears Craftsman automatic garage door opener. This may not apply to all models but has some good tips in making the rep…

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23 thoughts on “Fixing Sears Craftsman (LiftMaster) Garage Door Opener–Stripped Gears

  1. Kris Kasprzak says:

    I’ll guess the stop limit needs adjusting. This is not uncommon after changing the gears. It the adjustment screws on the side of the unit.. you will need to adjsut the stops until the door just kisses the floor. Keep your finger on the remote to stop the door during adjustment.

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  3. Scott Gwinn says:

    I completed the replacement. When I press the button on the opener the door doesn’t move at all. What do I do now?

  4. I’ll be doing this probably next weekend. But I will just order the whole gear and sprocket as a whole, as that way it seems to be much easier than trying to just replacing just the gear.

  5. Thank you so much! I do video for a living but you video was just fine.

  6. Hey thanks alot for the video. My dad had his go out and I know I will be the one to repair it.

  7. Elliot Feldman says:

    thanks Kris, terrific job.

  8. sekibarhemet says:

    Exactly what I needed. Great job with the video.  Thanks a lot.

  9. Kris Kasprzak says:

    OK assuming I’m not be heckled…. I really don’t think you can use KY jelly, it’s not intended to be a permanent lubrication–If you know what i mean. get some good lithium or automotive greese and do the job right. PS don’t use lithium or automotive greese for intercourse :)

  10. Kris Kasprzak says:

    I’ll guess the “pressure adjustment limit (adjustment screws inside the unit) needs adjusting or the stop limit (adjustment screws outside the unit). This is not uncommon after changing the gears.It sounds like the unit is “bottoming out” and forcing an open. Keep the remote in hand and be ready to stop if you adjustments are wrong.

  11. Kris Kasprzak says:

    I’ll guess the stop limit needs adjusting. This is not uncommon after changing the gears. It the adjustment screws on the side of the unit.. you will need to adjsut the stops until the door just kisses the floor. Keep your finger on the remote to stop the door during adjustment.

  12. jose romero says:

    My garage door goes all the way down but doesn’t stop how do I fix this problem

  13. born2runmotors says:

    Hey what if the door goes all the way down and then comes back up then stops all together

  14. Great video, You saved me $100.00 I got the gear off eBay for $7.99 it did not have the grease. All I had was some KY jelly. I put a lot of KY jelly on the gears the door works great better than ever. Do you think the KY jelly will be okay?

  15. Thank you. I got everything taken care of. My biggest difficulties were getting the chain on just right and not having all the right tools (and having to improvise with the tools I did have). Not sure if I’d ever take on something like this again on my own, though.

  16. Great vid, i watched this cause its my turn !!!

  17. Alan Stevens says:

    Great job on the video :) Now I have to go take mine apart. I was wondering how often this happens.

  18. I guess they make these out of plastic so you’ll have to purchase new ones. Ridiculous!

  19. Kris Kasprzak says:

    This does make a great father/son project. Glad I could help.

  20. Travis Moore says:

    awesome video and instructions Kris, me and my 17 year old son had just about given up on fixing this and we were ready spend almost $300 on a new opener and the installation, then we came upon your video and an hour later we had our garage door and opener running smoothly again! Thank you sir!

  21. Thanks. You helped me get started this afternoon. About 45 minutes later my opener was fixed.

  22. David LeClair says:

    Great video Kris – you showed a good amount of details. I haven’t replaced my yet (the gear is shredded just like yours was), but will as soon as the parts get here.
    Thanks!

  23. Kris Kasprzak says:

    I’ll guess the pressure adjustment is off. Basically this adjustment allows the motor to apply additional force to open or close the door. It is a different adjustment from the amount of travel. If i remember the pressure adjustment is inside the unit–meaning you need to take the cover off.

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