Craftsman (LiftMaster) garage door opener issues?
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- เผยแพร่เมื่อ 8 ส.ค. 2011
- If your Craftsman (LiftMaster) garage door opener has stopped working (the door will not open or close), chances are the drive gears are stripped. Learn 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 repair. Links on where to get replacement parts and required tools are included.This instructions should be good for a Liftmaster, Chamberlain, Craftsman, Sears, Master Mechanic and Wayne Dalton unit. The model number for the unit in this video are 139.53674SRT2 The part number for the gear set is 41A2817.
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This was super helpful, thank you! The replacement part arrived at my door at 9am and I had the door working by 10am. The one thing I would add is that if you don't have a vice, I'm not sure how you'd get the pin out to remove the old gear. In that case, be advised that you can just buy a whole new sprocket/shaft assembly with the new gear already on it for just a few bucks more. Search Amazon for part number 41C4220A. Even if you do have a vice, the time saved might be worth it to go that route instead.
Also funny that looking back through the comments it seems to be all of us Minnesotans that are having this problem this month. :-)
i just ordered the whole sprocket assembly for the same reason - hope it works.
Very helpful video! Fran, thank you for that tip. I personally do not own a vice and was hoping to find an alternate solution in the comments. I will be placing an order for the whole thing (sprocket and gear) later today. Also from Minnesota! :)
Thank you very much for providing the part number on Amazon. I am facing exactly the same situation and need to replace the gear & sprocket assembly. Just ordered one on Amazon. Hopefully, the replacement will be a breeze. Much appreciated.
I wish I would’ve read your comment before I attempted this repair. It took me hours to remove the pin and then replace it because I don’t have a vice! Thanks for the info. I hope it helps someone else with the foresight to read the comments before they actually do this.
Great tutorial. I just bought a whole new unit $$$$. After watching your walkthrough, I’m Returning it and replacing the gear. You saved me a lot of time and money. Thank you
Glad I could help
Kris, I'm a guy with 5 thumbs on each hand. Watched you video and I was able to repair the door opener. Thanks for taking the time to post your helpful video!!
i began troubleshooting the repair by removing the whole gear/motor box since i started before finding the video on youtube. i ordered the part through sears, received it in 2 days. i never wouldn't figured out how to remove the shreaded gear without this video. the job took me about 2 hours total, i really took my time since i'm not the most handy guy. this video saved me both $$ & time, i really appreciate it Kris !
Kris, thank you so much for putting up this video and it gives me the confidence to do the job myself. In order to make sure there will be no surprise, I have read most of the comments for additional tips. I thought it would be a time saver if I summarize all the tips over the years here.
Plan on 30 - 60 minutes for the job. Time depends on how detail you want the job done. Count on doubling the time if you want to change the worm gear.
Before disassemble, you would want to mark the chain position, clamp down the chain trolley, and mark the top cover orientation. This will save you time on adjusting the limits.
Loosening the chain tension screw will make your job in detaching the chain a lot easier.
Cover Screws for the sides and front/back are different. Be careful when you put them back.
Taking the back cover off and detaching the circuit board will make it easier to access the inside, but it's not a must.
Remove the hard to reach screw for the main gear assembly first. You won't need to struggle if you have a 5/16" ranch.
You don't need a vise to remove the pin from the main gear shaft. What you need is a 3/16" pin punch and then the job can be easily done by propping the shaft across two pieces of 2x4's or something like that.
Putting on tons of grease will be pointless if the debris is not clean out from the worm gear and surrounding areas. The debris will shorten the life of your new gear.
Your gear kit will come with instructions. Couple that with Kris's video, one should be able to tackle the job successfully. There are three more TH-cam videos on the same subject and explain the job from different angles. These can fill in the gaps if you are not sure how to mark chain position and clamp down the chain trolley with a visegrip. They were by AdamDIY, Paul Gatekeeper and All-Pro Quality Garage Doors.
Thanks guys for helping me out with the job. Hope my summary helps others
Thanks for the helpful vid. My moms door just went down and she was about to buy another one. I told her to hold till I could look at it. Saw that gear was worn, found your vid, saved her some money. Jesus bless you, take it easy.
After my son and I both smashed our fingers by opening the door manually, decided to fix it! My son came across your video and was able to fix the door in a short time. Thank you Kris! You are the man!
Just want to thank you Kris for this instructional video .. I today replaced gear per instructions and are back in business again at a parts cost of maybe $8.00, and a couple of frozen fingers
Glad I could help.
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!
After obtaining the replacement parts,I watched the video. I avoided trying to figure things out and was able to replace the parts quickly. Thanks for an excellent presentation.
I followed your great instructions two years ago. Worked great! The hardest part was removing the pin from the gear. Now, i'm about to do it again on the other opener. thanks again.
+Mario Vacca any tricks to removing that pin? I'm having a rough time getting that little sucker out.
+Heather Conley Art I had to put the assembly in a vice (with the vice grabbing the inner plastic hub of the gear) and use a nail punch and hammer pretty hard. The nail punch needed to be thin enough to go through the central hole of the metal shaft to punch the nail all the way through. An easier alternative is to buy a kit that includes an already assembled replacement shaft with the new gear pre-installed for just a few bucks more, search Amazon for part # 41C4220A.
Fran Fabrizio I ended up taking it to a mechanic friend of mine and he did exactly what you said. I guess I could use a vice for the garage for future repairs. lol I thought about buying the entire assembly but then that hard headed "I can fix" it part of my brain won me over.
I can't believe I found this video. This is the exact door opener I have, but my gear is in much worse condition. I am going to order parts today. My door does not open easily manually so I want to fix that before re-connecting to the garage door opener. Thanks for the video - this will make this job much easier.
Thank you so much sir! I cracked my opener open and was a little overwhelmed. Saw your video and ordered this cheap kit to get me running again. The parts are already out of the old one waiting for the new ones. Took me all but 5 minutes haha. This is why I love TH-cam lol
Chris: Thanks you SOOO MUCH for a clear, easy to follow presentation. Many folks feel so intimidated by repairs, but your oral encouragement along the way makes the presentation that much better. Your an Angel dude!
Just finished following your instructions successfully .. Only $15 out pocket.....Well done and THANKS....
I was able to fix my garage door opener ! I bought the gear separate from Amazon for 6.00! Thanks for the video. Super helpful. Couldn’t have done it without the video
Kris - Thank you very much! I had looked on Amazon for the white plastic gear and an Amazon review sent me to your video. The whole Pilot garage door opener cost $370 in 1999 and the company that installed the garage door probably would have wanted to replace the whole unit and charge $100 at least for the service call. Instead of spending upwards of $500 for a replacement unit after 14 years of operation, I bought the gear and grease on Amazon of $14 and saved over $400. Great how-to video!
thanks for the video. no one is happier than my wife! got the whole job done for less than $20
Glad I could help.
thank you. I just had mine replaced today while watching your instruction every steps. taking out the pin from big gear was quite challenging. thank you so much. you helped me save some money. i don’t have to buy new one.
This is one of the best instructional videos I've seen! Great camera work and lucid explanation. Well done, Kris.
Your instructions were very clear and easy to follow. The only difficulty that I had was removing the hollow bottom pin from the drive gear, as my nail set enlarged it, instead of pushed it. Once that was done and I reinstalled everything, I did need to reset the travel switches on the door, as you mentioned. That was likely due to my loosening the chain, in order to place it back on the sprocket. Thanks! You saved me a few hundred on a new opener.
You're very welcome.
Somehow I ended up here watching your video. I would say that anyone who watches your video should be able to replace those gears easily. If they cant seem to accomplish this then it's probably time they ask a neighbor or friend for help. Very well done! BTW this is first time I have ever complimented someone on a video that was very well produced, because most aren't.
Great video Kris.
Yours was the best on TH-cam for replacing the gear in my garage opener.
Thanks !
My gear was stripped and is on the way here. Watching your video is helpful. Thanks!
The gear and shaft assembly can be purchases as a kit and may be easier to replace. Costs more though...
I have a similar Craftsman opener, cracked open the back panel and found the same gear completely stripped off. Thanks so much for this video, didn't know I could order the individual parts from Sears. Saving me a couple hundred dollars from replacing the whole unit!
Great job! Took me a little longer since I replaced everything that came with the kit. This video was exactly what I needed to give me the confidence to tackle this project.
Thanks so much. This will be second time to do this, but at 24 years old, I am thankful for the long life Sears opener.
Glad I could help.
THank you SOOOO MUCH for posting this video. I was about to buy a new opener thinking my was done for when I found your video as a last resort. Got my parts in a few days and completed the job in an hour. Hardest part was popping the roll pin out, otherwise it was a piece of cake like you mentioned in your step by step instructions. THANK YOU SO MUCH for saving me money!
Thank you! Just fixed my garage door opener, with your help. Didn't want to have to call or pay for a Sunday repairman
Thank you so much for all your suggestions- We figured out that we just simply had overworked the motor while trying to adjust the up and down process. I tried opening it with the auto controls and it worked and I think we are back in business- I thank God for wonderful people like you- you saved us so much money in repairs- Again I can't thank you enough! God Bless!
I love TH-cam. Just had my opener stop working, opened it up to see a bunch of shavings like you. It's the exact same problem with the exact same unit! Love that there's a video showing an old opener like mine lol
Glad I could help.
Just used your video as a guideline to fix my garage door opener. Removing the pin that holds the gear in place and then putting the pin back in was by far the most troublesome. Thanks for sharing this DIY vid.
Hey Kris, thanks for this video! I ended up having to take the chain off, but everything went smoothly, and I was able to adjust the travel and all was good. My garage door repair guy said, "Well, you'll probably need to replace the unit, so all said and done, it'll be about $650.00" Thanks to you, it cost $11.75, an hour of work, and a cold beer. Outstanding video. Thanks!!
I appreciate you & the fact that you explained everything in a manner that was easy to comprehend & understand. A great job all the way around!
Glad I could help.
Thank you. Kris. Mine went out 30 minutes ago and I was livid. Now I see it's something I can fix. Thx again!
Glad I could help
Haven't done it yet but... Thanks to this quick and perfect guide, I'll be doing it this week. Really appreciate you taking the time to do this!
Kris, thanks for doing this. It made this job go a lot easier and I saved myself hundreds of dollars in buying a new garage door opener. I think I spent a total of 45 minutes on this repair, as I also adjusted the chain and the limit switches while I was at it. Thanks again!
Thank you for this instructional DIY video .
Not only did you keep it simple & straightforward you saved me and my Family hundreds of $’s … 👍👍
Glad it helped
Thanks so much! Took me about and hour all said and done. I found the 3 5/16 screws to be the biggest pain.
With the help of this video I installed the replacement gear yesterday. The step by step instructions are excellent and saved me money and time. Thanks for the high quality video!
Big thank you for this video. The most comprehensive fix it that I have found to date. Our landlord thanks you too. Cheap fix for a problem door since 2012.
SOOOOOOO helpful. This video made something daunting super doable. Both of my garage door openers stopped working within a day of each other. With this video and the parts, I fixed them both. With the learning curve the first one took longer, but I was able to do the second one in half the time. Thanks Kris!
Glad I could help.
Thank you! This was exactly what I needed. My garage door opener looked just like yours on the inside with all the plastic dust. The worm gear was fine, only the drive gear needed replacing. $6 shipped on eBay with grease included. Can't beat that!
+brian0918 Glad I could help.
Great instructional video. Thanks so much. I was a little concerned when first faced with the worn out gear. You made it easy.
Nice of you to explain it all in detail...
This video is legit, it was exactly what I needed to do and it solved my problem. Thank you! The toughest part is definitely taking out the three screws. I also ended up using a 3/16" pin puncher and laid the shaft across two 2x4s to hammer the pin out.
Glad I could help
Thanks Kris.
Followed these instructions right down to using the nail punch and they worked perfectly. I also found if you remove the rear plate with the circuit board (but leave all the wires connected), you can take a little string and tie that up and out of the way for MUCH easier screw access. Appreciate you posting this!
Thanks! Just took apart my opener and found this gear shredded to pieces. I was intimidated at first by the work involved with replacement at first glance, but after this I'm confident enough to order the part and replace it myself, saving me a ton of money!
Glad I could help.
Note: the gear and shaft assembly can be purchases as a kit and may be easier to replace. Costs more though...
Thank you so much for this video, I had the exact issue you have mentioned in this video. Without this video, I would have to call someone who probably would have ripped me off as I wouldn't know what was happening with the garage door opener. I spent $10 on the part and went step by step on your video and got my issue resolved and working again!!! Taking the pin out of the spindle/gear was truly a pain and the bench vice is very much needed to tackle that part.
Glad it helped!
Thank you, I had no idea how to do this. Seeing your video me the confidence to get the job done!
Awesome video , I thought this was going to be an afternoon project when it was more like 20 minutes. Thank-you youtube and you Kris.
Thanks for the video. I ordered new assembly (Liftmaster 41c4220a Gear and Sprocket Kit) for $20.60. It took me many hours but I got it installed. My garage door opens much more smoothly and quieter.
Glad I could help
Thank you. I saved and used this video 3 years ago to fix one door and the other gear just went today! Will be using this video again. Ordered 1 new worn gear for $6. You saved me alot of money once again. :)
Glad I could help.
I just watched this video and replaced the gear in my opener. Doesn't get much easier!! After I got it all back together, I did have to adjust the up/down travel as well as the closing force.
Thanks for the easy to follow tutorial.
Cheers. Wouldn't have attempted without watching this first. Hardest part was getting the damn screws out and the pin without a vice. Ended up putting the screws back in from the top rather than the bottom.
Gordon, UK.
Great video, Kris does an excellent job in describing all the steps. Thanks so much
Very helpful, thanks for making this! Took me about 60 minutes total from start to finish.
Dude! Thank you so much for taking the time to do this. You have saved me and I'm sure so many others hundreds of dollars! It's really a big deal and you deserve a HUGE THANK YOU!!!!!!!
Kris....you just saved my a lot of money buddy! After getting a quote to replace the entire unit with labor I was looking at upwards of 400.00 bucks. I watched your video last night and decided to investigate by opened the unit to find the gear had been ripped to shreds just as you said. I went on Sears direct ordered my part and picked it up when they opened this morning. And now my friend I have a working garage door again!!!! Had to replace the safety sensor as well as one was no longer lighting up and the door would not stay down. Altogether I spent around 50 bucks for parts. I cant thank you enough for making this video
You're very welcome. I should add a note in the vid that a complete gear attached to the shaft can be purchased--and makes the job a bit easier.
Thank you for posting the part number! Such a big help
Excellent how-to! No wasted words, very clear images and explanation. Sears sells the gear package for $40..I ,know how some got it for $8.oo, but $40 is less than a new opener assembly. My opener is 34 years old...
Glad I could help. I recently had to do this again on another opener but this time, the shaft broke at the sprocket. so i had to replace the gear/shaft assembly. the replacement was easier as the new assembly was already assembled. Just a thought in avoiding removing the pin.
Just picked up what I thought was a couple of gears for which I paid $40..turns out to be your second repair...a fully assembled driveshaft, etc.
Thanks for the clear video.
I had a limiters problem but the gear was in excellent condition, so, here is the story:
I had my Liftmaster 5580 ( from 2006) "fixed" by technician. The "fix"
hold for 1 day... The Tech guy said that my gear was gone, and it will
cost 350$ to replace it!, he also brought a new LM80 for 820$! I didn't
agree of course.
So, I looked for videos on TH-cam and thanks for all the good people
that filmed their fixing I was able to understand what is going on.
First, I opened the motor back door and I looked carefully. My gear was
as new!
Now, my simple idea is to bring the the up and down limiters to their
correct place by visual inspecting inside the motor and manual rotating the screws.
I disengage the gate and put a mark on the rail holder of the trolley,
once, for the gate is in closed position and another mark for open position
to the height I want.
Then I engage the motor to a learn position (2 clicks on the orange
square button on the back of the motor, the the small light is blinking)
The advantage at this mode is that every push on the remote controller
is either moving up or down, so I can adjust the trolley position.
So, I brought the trolley to the up position and then my simple
contribution to the solution is to rotate the up limiter with a flat
screwdriver until its metal contact is touching the metal in the middle
wide limiter gear, while I am with the motor back cover open so I can
see exactly the movements and where and how much I should rotate (no
more guessing...)
The same I did for the down position.
Then I engage the trolly to the gate, start another learning mode and
there it was fixed! (at list 2-3 times up and down with learning mode
so this motor can adjust itself to the force required. (The blinking
light is stooped when the engine did it learning job successfully).
I hope this will help someone with the same annoying problem.
+EZ Good tip.
+Kris Kasprzak
Thank you. I hope my English was clear enough.
Exactly what I need to do , Just wanted to see how it is done before I tear into it. Great video and actually looks easier than I expected, thanks
Glad I could help
Amazingly accurate video. You are correct on the unlikely need to replace all the other hardware, including the worm gear. I cleaned the hardened gunk out of the worm gear and it looked like new. The drive gear appears to be made out of a much softer nylon, and as a result gets chewed up quicker. This is a common sense approach that is much easier to do. Thank you very much for posting this video. I picked up 2 drive gears for 8 bucks shipped on Amazon. My 20 year old opener works great now.
Glad I could help!
Thanks for keeping the video to the point. I had to replace the sprocket as it had snapped right off the shaft. The only problem I ran into was trying to figure out which part # to buy. I have a
Sears Craftsman Model # 139.18856
The replacement part is 41C4220A ... this includes the sprocket and the gear already assembled so all I had to do was slide out the old and slide in the new. If you are having trouble finding which part # you need, just call Sears Parts and they will sort you out.
Great video! I was going to purchase a new garage door opener but thanks to your video I saved $175. Thank you!
Glad I could help
Kris, you did a fantastic job at explaining the replacement of the gear. Thanks
Nice job. Very, very helpful. Thanks for taking time to viedo this replacement. I didn't have a clue on where to start. You saved me a service call $$$$ and impressed the wife.She didn't think I could do it.She wanted to call the service guy. Thank you so much.
Thanks. You helped me get started this afternoon. About 45 minutes later my opener was fixed.
Thank you so much for this video! it's been beyond informative. Now I just have to wait two and a half weeks for the parts... Dawmm!
Great video. Thanks. Allowed me to change the gear myself. Works like a charm now. The only step missing was how to remove and put back the chain around the gear on the motor. That cost me probably 2 hours, on and off. Some people may think it is obvious, but the video does everything step by step except that part, so it threw me off quite a bit. That is the only thing missing.
I bought the whole entire assembly kit off Amazon for less than $20. Thanks for this video brother.
Glad I could help
Kris - Thank you so much for this video. I have an older Sears Craftsman opener, and until I saw you video I was going to buy a new opener and pay for a someone to professionally install it. But after watching your video I'll open and inspect the gear.
Great video! Followed your instructions to the "T" and the opener works like a dream.
Thank You!
Kris, thank you so much for the explicit instructions. They were very clear and extremely helpful! I was able to replace the worm gear very easily. Bill
Thanks for the feedback.
Great job! Thanks a lot, been without my door opener for years til I seen this video and how simple it was to fix.
Your video was a huge help for me. The directions which came with my gear were completely overwhelming- I made it through the process successfully thanks to you. Thanks!!
Great instructions. Took a bit longer than your estimate but definitely easier than installing a new opener. And cost about $170 less! The opener works great and is incredibly quiet! Thanks!
This is the perfect video! Great work with the camera - really appreciate your contribution to DIYers.
You're very welcome.
Great video! No parts available in the UK for my door, but found a part delivered to UK for $35. Much better than the $500 repair quote we were given!
Thanks for the awesome video. Very well explained. I ordered the parts and will be attempting the fix Wednesday!
Update: My garage door is now fixed 😀
Thank you very much for taking the time to post this. It was just what I was searching for.
Thanks a ton. Your video was right on. The tough part for me was getting that little pin out. Insane. But once I got it out I was home free. Thanks!!
Thanks Kris, great video, very helpful. The one screw near the "worm screw" was difficult for me. Everything else was as described (easy).
This was a good "how to" video. I actually ordered the whole replacement part (shaft assembly). Overall, it was moderately easy to replace. Much more efficient and less expensive than replacing the whole opener.Thanks for sharing!
You're very welcome
Thank you for putting this up. Just used your info to change the gear in mine. I'm good for another 20 years.
Thanks Kris. Your instructions worked perfectly. Very simple once I saw the video.
Great video! Fixed mine good as new because of your great camera views and commentary. Thanks!
Glad I could help.
Thank you! This was just what I needed to get my garage door working again. The tip about using a clamp to put the pin back in was essential. I don't know how I would have done it without that.
Glad I could help
Thank you! I watched a few of these to finish my repair and your guidance helped!
Glad I could help.
Great video/Audio. My opener gears looked just like your. Thanks to your video i don't have to ignore the problem anymore or buy a new opener.
I had to squish in a wrench but got it eventually. Love how they tucked it in to make it tough to get out.
Four people think Tab A goes into Slot B, and therefore couldn't follow these *excellent* and well-documented instructions.
I know some one who called on me to fix his garage opener. This helps a million! Thx
excellent! i was able to buy the gear by itself on ebay for $5.10. my opener appears identical to yours. with the help of your vid i took it apart and it had the pile of white shavings and a stripped gear. after dis assembly the only part bad was the one gear. I used a vacuum, compressed air and a toothbrush to clean. i also removed the back panel, disconnected the pcb plug and swung it on top of the opener for easier access to the three bolts on the gear assembly. i used automotive grease for lube. THANKS!
AnimationBubble you're very welcome.
Thanks Kris! Just discovered the same issue with my craftsman. This video will make the repairs a breeze!
Awsome video, very helpful... my garage door stoped working and was making a griding noise inside. I panicked i thought it was going to cost me a fortune but because of this youtube video I ordered the part and replaced the gear myself.. the only mistake i made was i forgot to mark the chain so i have to play with it and found the right placement.... you are the best man... Great job with this youtube video. you are a money saver. Thank you...
Excellent. Thanks for putting it up. It gave me the confidence to tackle this repair and saved me a bundle.
Thanks so much! I actually have two of these openers and the other one just went about 2 months ago. The garage company said they couldn't repair it. Now I see how easy it is to do. Thank you. You just saved me $430!!!
Glad I could help!
Fantastic video!!! My opener stopped working today and I just finished taking the cover off. Everything looked exactly as shown in your video. A little intimidating I might add. I will now track down some replacement parts. I don't anticipate any problems now. Thank you very much.
Glad I could help.
Kris, thanks for the excellent video. Repair cost was about $12 with gears from ebay. One note - when reinstalling the drive gear, the DIYer should make sure the top mounting plate is oriented so the two rectangular slots for the sprocket cover are to the front and back. Otherwise, you may get everything put back together and find the sprocket cover won't snap in place.
good tip, thanks for posting