DON'T MAKE THESE MISTAKES - Garage Door Gear Sprocket Replacement
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- เผยแพร่เมื่อ 17 เม.ย. 2021
- I believe anyone (who's handy and has the proper tools) can repair their garage door motor by replacing the gear sprocket assembly kit. But there are some common mistakes that are looked over too often. If the garage door gear broke off or the garage door is not turning, there's a reason. If you don't know what garage door gear kit to buy or the garage door gear is not turning, there's also a reason for that. If your garage door gears stripped, then you must avoid these common mistakes. In this video we are going to cover some things to know about a garage door gear kit. And we will cover some pro tips to help you with your next garage door gear and sprocket replacement.
#garagedoorgearsprocket #garagedoorrepair #garagedoorgearreplacement
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Chamberlain 41C4220A Garage Door Opener Gear and Sprocket Assembly Genuine Original Equipment Manufacturer (OEM) Part
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Liftmaster 41c4220a Gear and Sprocket Kit for Chamberlain, Sears, Craftsman and LiftMaster 1/3 and 1/2 HP Chain Drive Models
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2 Pack - Drive Gear for Sears Craftsman Liftmaster Chamberlain Garage Door Openers 1984-Current
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I went through this with my Chamberlain opener recently and came out of the experience with one tip: Liftmaster provides excellent instructions with their part, and it's worth the time to follow their instructions. Two of the tips you mention - lubricating the gear, dealing with travel limits - are addressed in there. Their procedure takes care of travel limits with less work than any alternative routine presented by other random youtube DIY videos, some of which can actually screw things up pretty badly.
Also, the instructions serve as a checklist (they even tell you to check off steps as you do them) which prevents missing steps. In my haste, likely with some contributing distraction, I'd forgotten to tighten the mounting nuts for the motor before reassembling, and only discovered this from the loud buzzing sound after getting everything together. If I'd slowed down to check the instructions along the way, I'd have saved the trouble of taking things apart again to get access to those nuts to tighten them properly.
Install-time tips aside, there's also a matter of getting the actual parts to use. It may be tempting to shop around on eBay or Amazon for the best price, but there are countless third-party parts out there. Some may be as good as genuine, but I imagine it's just as likely some are of poor quality that will work fine when first installed but not last 30 years like my original gear did. It took a fair bit of time shopping around to find a listing I was sure was genuine. It turns out that ordering direct from Liftmaster, prices aren't that much more than from Amazon or eBay, and in retrospect, given the time, I'd rather just spend those few extra bucks to avoid either gambling with aftermarket parts, or sifting through all the listings to figure who's not aftermarket.
Thank you for all the excellent feedback! Stay safe party person!
Thank you...I did find value in your video... Wish I'd watched it prior to asking my son to replace the gear sprocket... Again, Thank you! There might be hope for it yet👍🙂
I have read many garage door openers information, more to them than you think!
outstanding video on the garage door tips
Thank you for your great videos! I screwed up! I did the level/balance test (was great) followed by adjusting my chain on my LiftMaster Pro 3265 1/2HP due to too much slack. After doing so, my door opened and closed great with the exception of the door automatically re-opening when it touched the floor. I adjusted the Down Limiter clockwise in 3/4 turn increments and tested. Without success, and after doing about three of these increments, my sprocket snapped off. I must have turned it too much forcing the door down too far. I ordered a gear and sprocket kit after removing the motor covers, everything else looks good. Since the adjustment was in all liklihood the problem, I will definitely do a run test "without" the door attached first due to messing around with the down limiter. My only concern at this point is to have the down limiter screw at a good starting point. I've been trying to find out if/where the factory sets them initially but, no success. Thankfully, I didn't touch the other limiters. Lesson learned..... I will do much smaller increments. Thanks again for your video, appreciate it. 👍😊
Hello! I'm so glad this video was helpful. There are a number of ways you could set the limits but to know how the factory sets them is still a mystery to me. I personally like to make the adjustments from the close position. And as long I know that it's in the close or down position then I can make minor adjustments for the opening. It takes a little time a patience but in the end it will make for better operating experience. Thank you for the feedback!
Awesome Job!! Thankyou Sir!
Excellent video... I recently changed the gear / sproc .. my issue is the trolley keeps on going all the way in its down travel , even if I regulate via the dials that adjust the Down/Up Travel ... as a metter of fact the trolley goes all the way down that the rails make a cranking noise and bend up ... but gets compensated in its UP travel ..
Thank you for the feedback. So it's quite possible that the contacts to the actual open and closed travel limits are bad. There's also a possibility that you might have an issue with your board, the logic board to the garage door opener motor. Another thing you can check is the balance to your garage door. If your garage door has heavy balance that might be pulling on the travel. Either way if you have a failure to the contacts and it's moving too far forward you might need to start planning for a new garage door opener motor.
Since I've had my openers, I go up and grease/lubricate the gears and shaft assy. about once a year. My old opener on my third door is over 25 - 30 years old and still works like new.
That's a long run. I hope it give you many more years.
Great video
Hi just 2 let you know a very good video, I’m taking my Liftmaster gear sprocket apart, what I have got, is the double sprocket, that I want replacing, I’m in the UK and on Amazon uk I can not find one, I’ve tried looking for the same one with no luck, can you please possible help me to find one that I can purchase in the uk, again your video is very helpful Raymond
Great videos thank you Brother
Thank you! Stay safe!
I have a Liftmaster with the Double Sprocket and my chain fell off. You mention that one sprocket is for a wooden door. Can you advise if it's the large or smaller sprocket? I want to make sure when putting the chain back I attach it to the correct sprocket. Very informative video, thank you for posting! I happen to be in Chino Hills as well.
Hello. Sorry I missed this question. I believe I answered your email. Let me know if you didn't get it.
Great video, Santiago!!!!
Thank you! Y'all stay safe!
Thanks for your video. I recently replaced a gear and sprocket with the same exact one. I did lubricate it when I installed it. I inspected the worm gear and it looked fine so I didn't end up replacing it. About 2-3 weeks later, I noticed the same symptoms. The garage door would only open less than halfway. I would have to press it a few times for it to open fully. Eventually, it completely seized up and the garage door wouldn't move an inch in any direction. I opened the casing and found shavings and the gear stripped again. What do you think would be the most common cause of this getting stripped again soon after? I'm thinking of just buying a new unit instead of trying the replacement again. Your advise would be greatly appreciated
Hello. So it's possible the balance to the garage door is affecting your motor, specifically your gear assembly. Under these circumstances, I would hire someone to check your balance and offer some solutions to make sure your garage door is not the source of you issue. If you find that your balance is good, then it might be a faulty part or your motor just needs to be replaced. In the end that might be the best long term solution. Hope this helps.
Did you use white lithium grease on the gears? If you did, that's the reason why your gears strip in 2 or 3 weeks. You must use the little grease package that comes with the gear.
@@aeronasca my sproket broke .. but i only used white lithium grease on the wheels on the door to help it roll better. (not in the motor) . does white lithium grease cause seizes that destroy motors?
This video Really helps. Now Im partying watching it. Here's a Bonus If we could replace the nylon gears with Metal ones Im guessinf it will make the units last forever. And really Party.
I have 2 genie openers made in the early eighties. They have metal gears and are still working. Have a 50 year old opener, metal gears and still working. The remotes frequency is in the audio spectrum. I refuse to replace things just because there are old.
@@joepinball3187 me too. Our water heater was installed in 1989!
After a lightning strike tripped the GFI her door worked except once down motor kept trying to drive it down and motor hummed loudly. Tried to back off the downward travel but to no avail. Finally, it was down humming when suddenly a loud grinding noise came from motor, so I yanked the cord. The sprocket was chewed up. I'm waiting on a new sprocket, and I ordered a new logic board thinking it was messed up from the lightning and that's why it kept driving it downward no matter what I did. Wish me luck! Ha Ha!
Hello! I believe you can do it! Hope it all turns out well.
hello there, thanks for posting the video. I have a quick question. Is the sprocket/gear supposed able to rotate freely by hand? My new part does not turn at all! Is it defective?
Hello. It should be hard to turn but not impossible. Have you installed the part?
I have a very old sears garage opener from the 1960s 70s idk...came w the house.
Your videos are AWESOME! I made one mistake and hoped you could help. Before realizing what the problem was with my door., I DID NOT MARK THE CHAIN OR THE TROLLEY LOCATIONS…. Now the the new gear is installed etc. when I press the opener, it moves the chain a few inches then stops. Both directions. I think I am making a rookie mistake. Can you help? Thank you!
Hello! Thank you for the excellent questions.
So it sounds like your travel limits are off. Here's what I suggest:
1. Loosen the chain and take off the sprocket.
2. Press the wall button to get the garage door to close.
3. As the garage door opener internally start to travel down (the door should not be moving), have a family member or friend block one of the safety sensors.
4. The garage door opener should internally operate back up, blinking or clicking once it's done. This indicator means the travel limit is in the up position.
5. Run the opener once more, this time do not block the safety sensors. The travel limit should be in a down position.
6. Unplug the opener, reattach chain onto sprocket, and tighten chain to proper tension.
7. Power the opener and operate the garage door motor one cycle up and one cycle down.
8. Adjust travel limits when necessary.
Hope this helps!
I have read that belt drives are more resistant to gear failures due to the belt absorbing some vibration, but I don't know if that is true.
That's probably true. I rarely replace gear sprockets for belt drive motors.
Gear sprocket replacement went well. As I was adjusting the up/down pressure the middle plastic rod popped off. There is a plastic rod for each up and down and also a rod in the middle. The up and down are fine but the middle rod popped off and now the garage won't engage at all. There is a metal piece on the middle rod I'm not sure what it should be touching. Please help +!!!
Hello. Sorry for the late response. Are you able to send pictures of what you are describing. You can email them. My email address is the About section of my channel.
Thank you for sharing sir, can I please take the liberty of asking a question regarding a stripped lift gear I have a chamberlain 1A4368 but can't seem to find a specific part number replacement or alternative compatible gear/model. Grateful if you can advise many thanks.
Hello. Thank you for the question. I can't seem to find that part number in any of my references. Do you have a model number to the Chamberlain garage door opener?
@@sosgds chamberlain autodor model 1A4368 is what's on the rating plate, and thank you for your reply
I am looking to purchase a 18'x8' garage door seems most doors are 27 gauge. Is there a heavier duty door? I am not concerned about style or type just a more durable door. Do you have any recommendations or advice thoughts. Thanks for any help you can give me
looking for insulated door
Hello. Thank you for the question. Most insulated garage doors are 27 gauge. I don't know of a door company that offers anything thicker. Thus it might be more effective to compare the R-Value of the door insulation. A polyurethane door will be better than a polystyrene insulation. But polystyrene is more in price. Hope this helps.
hi i have a question i looking for gear sprocket 41c550 is my number part but i can;t find this specific one shows Replacement for Liftmaster 41C4220A Gear and Sprocket Kit. is this part thi same?
Hello. That's a great question. Do you know the model number of your garage door motor? That's not a part number that I am familiar with.
I want that gray genie in the corner of the video 😂
I have 2 old Liftmaster chain drive Garage door openers. One is from 1994 and the other is from 1996. If the gear or other component goes bad, would you replace it or buy a new opener? I’m afraid at this age, other parts would go bad.....What do you think? Jim
PS.....I am a bell subscriber, Thank-you for your great videos. God bless you!
Thank you so much Jim! I truly appreciate your feedback. You know, the older LiftMaster motors are virtually indestructible. A gear/sprocket might be replaced 4 or 5 times in a motors lifetime. But that overall cost, ($135 x 4) might better used on a new motor with updated features. As for the logic board I almost always recommend a motor replacement for a 20+ year old motor. Once a logic board goes bad it's 50/50 whether the new board will hold up. I hope this helps Jim. I truly appreciate your support!
@@sosgds what if it was the sprocket I have a 1994 lift master would you recommend replacing it or buy a new one. Thank you!
@@thuganator19 Hello. A new sprocket should work just fine. The older AC motors were pretty resilient. Thus you get more life from your motor.
Why cannot we move the door unless we pull the emergency cord,do the motor has brake or solinoid to prevent movement
Thank you for your question. I am having a hard time understanding it completely
What are you trying to accomplish?
Have you pulled on the Red emergency cord to lift your door?
Are you trying to disengage the opener?
I like the video, but it did not tell me how to adjust the worm gear that I put in. It’s got a little bit of play Endo before I mount it.
Hi the dual sprocket which one do you put chain on top or bottom?
Hello! Great question. The smaller sprocket is designed to offer a slower travel to the motor. This is ideal for very big heavy doors.
Just replaced the sprocket assembly & greased it all up.
Tried to tighten the chain. The only place tightening is the 6 inches from tightening bolt to sprocket. As if the sprocket won't turn .
Thoughts ? Thank you.
Hello. So to be clear, you are able to tighten the chain but now the sprocket is not turning?
@@sosgds I've since learned the sprocket only turns while engaged.
I have the door working but the lift bracket slams into the protection bolt.
Adjustment screw is making no difference.
Thank you for speedy response.
One way you can alleviate that situation is by shortening the angle of the J Arm or arm that connects the motor to the door. If you are able to adjust that arm by closing in the distance of the angle making it look like a true "J" shape then you should be good. You might need to make an additional adjustment to the travel distance but otherwise it should not hit the bolt above. Hope this helps.
Where can you get the the gear assembly
Just installed a sproket but when i try it the door only moves like 5 inches front and then mobes 5inches back, what could that be? This is a craftsman unit, i was testing it without the cover on too, could that cause it?
Hello. Yes. It sounds like you did not set the limits properly. You want to uncover the motor and see if the limits are moving towards the proper direction.
What kind of grease would you recommend for lubrification ?
Great question. I would use a white lithium grease for the nylon gear. You can do the same for the chain but it does get messy over time.
I need to replace the gear as in the second instance. My trolley is all but at the closed position n I need to move it back to the motor so I can work the garage door. My liftmaster motor works but no chain movement. That nylon gear u sho is no teeth on it Any tips on how to get the trolley away ? It also seems to be outa balance but I can’t determine til I can get open
Hello Scott. You might need to make sure your limit settings are off or perhaps backwards. If you have the ability to send pictures of your motor system that would be very helpful. You can email them.
@@sosgds the trolley just ended up in that spot when the gear failed. I have the same one as in the video
I see. So if you can gauge the same position then you should be ok to make minor adjustments from there to the open close limits.
If you're not able to gauge the position then you have to move the limits to the close setting. Then you simply slide down you trolley carriage to the chain rail to the close position to start from scratch.
I hope this makes sense.
The metal bearing or bushing? that my drive shaft goes through just above the travel limit gears is worn out-its inner diameter is too big resulting in the travel limit gears not staying engaged. The bearing is stuck, any tips on removing it? Thank You!
Hello. Send me a picture of what you are describing. sosgdoservice@gmail.com
I just replaced that bushing at the top because it was busted and was making a crunching sound every time i opened the door. When it breaks again, I will do some measurements on the shaft and see if I can find a bearing to weld onto the metal mount and not have to worry about it again.
Also one thing he forgot to mention when lubricating the gears, is to also lube those metal bushings on the shaft as well. The replacement set I got didn't come pre-lubricated and metal on metal friction will wear that bushing out even faster. If you don't want to take it apart, just use some lithium grease spray on them, same thing you would use on the roller shafts on the door.
I got it out with a lot of banging with a hammer and chisel thanks for the replies.
@@russellcrea9701 I went the easy route with a air chisel and a deep socket. :)
I have just replaced my Liftmaster Chamberlain gear and sprocket aseembly. However, I found the door opening too much and closing door stops about 2 ft from the floor. I tried to adjust but not working good.
Hello. Your travel limits are off. You might have to open the motor cover and inspect the travel limit sensors. This is the source of your issue.
Would you be able to do it for me.
How much would it cost me?
@@jaimebongoyan5501 🤔 Thank you for the opportunity ... Yet I may not be near you. 😅
Feel free to email me … sosgdoservice@gmail.com
My garage door is closed and it s like it is trying to close when I open my door and is putting it in a bind real bad
If the gear is sheared off, that's a good indicator something's wrong. 😁
Is access master the same type as lift master? Thanks
Hello! Yes. But do you know the model of Access Master you have?
tag team back again...
I have a Liftmaster #41a3627 1/2 hp that's 30 yrs old & the large nylon gear teeth had sheared to the point where the garage door will not lift the door anymore. Looking thru Amazon, I didn't find a replacement kit for mine. However, I found 1 kit from ebay. It will replace mine, 41a3627 & another model #41a5021, & this 1 is on Amazon for half the price. Do you know if it would work to replace my unit (41a3627)with the 41a5021 kit at half the cost from Amazon? I appreciate any suggestions that you can provide!
Hello. Do you happen to know the model number of the garage door motor you have? The model # should be in the front sticker. It might be the model 1245 or 1356. If you can confirm that number for me then I should be able to guide you.
Hello SOS,
I didn't take off the front cover, where the light is, as you suggested. There I found the model#, which is 1156LM & S/N: 0822C00021. Thx!
@@mariojauregui3518 thank you for confirming that for me. The truth is is that your motor is very old. And parts are limited for it. But you should be able to find it with this model number. Hope this helps.
LIFTMASTER Garage Door Openers 41A3261-1 Dual Gear & Sprocket Assembly
Hi SOS,
I received your suggestion on my situation. However, at the end of your reply, on the bottom was a part#. Was that part of a suggested item to purchased? Thx.
Hello! Forgive me. Yes it was a part number. LiftMaster does have it on their website. The following link will take you directly to their official website.
www.liftmaster.com/dual-speed-gear-and-sprocket-kit/p/041A3261-1
My gene garage door will not engage to open the chain turn a but will not open the door, any suggestions? Please
Hello. You might have a striped gear assembly.
I replaced my gears in my Chamberlain opener with the correct parts. Before I put it back into place, I tried to spin the chain sprocket by hand, ad I couldn't move it. What did I do wrong?
Interesting. If you place the gear sprocket kit into the opener, then that would mean the nylon gear (cog) was aligned with the inner worm gear (the white cylinder gear). Was that when you tried to move the top metal sprocket?
Yes. Maybe it is not supposed to move freely?@@sosgds
I got the opener together and in place .I operated the opener without the door attached. The trolley was in the closed position, and the opener pulled it to the open position. When I tried to close it, the trolley moved about 8 inches towards the closed position, then returned to the open position. The sensors at the bottom of the door are properly aligned and the lights are bright green. The down and force travel adjustment screws do not change anything. Everything looks to be lined up as it should.
My question is, My wife and I just bought a home, and as you can guess the motor to my garage door runs, but no movement in the door. I took the cover off and the nylon gear is shredded and won’t touch the worm gear. It’s a 1/2 ho “Just Do It” brand, and I want to order the right part. Any Idea?
Hello! Thank you for your question. I'm not familiar with the "Just Do It" brand. Is it a retail motor? Perhaps you can send pictures of it? You can send them thru my Facebook or Instagram page.
@@sosgds I found a small print on the bottom of the cover. It says the chamberlain group…. Part number 41A3627.
Oh wow! That's a very old motor. Do you know if you have a dual sprocket or a single sprocket? You should be able to look above the motor where the chain wraps around.
@@sosgds it’s a single sprocket. I can see from the top.
@@cashonhand-coinrings9311 You should be ok going with the standard gear sprocket kit. Yet as old your is, you might want to consider this model. amzn.to/3bCObOI
so if my garage door only travels 6" one way then automatically travels back 6" the other way, what is causing this effect?
Hello! If you have replaced the gear trolley carriage then the issue you have described might be with the travel module or travel limits. If you have the ability to adjust the travel by hand you want to make sure the trolley carriage is at the close position so that you can adjust the up travel first. Keep in mind that your start position will determine how far your door opens and closes. Hope this helps.
@@sosgds so neither of this come into play (no travel module but yes to the limits dials) I can see the disks turning away from the end of the limits and then it just reverses regardless of where the door starts and even if it the trolley is connected or not
Is the chain to tight maybe and the sensor is picking up excessive force?
Does anyone make these with a ball bearing, rather than a sleeve bearing, at the upper shaft? I wouldn't have to fix these simple items that wont live anywhere close to the life of mine or of the house. Yes, I know a small ball bearing would have added an additional ten dollars, but like so many things are ending into the dumps across the country are a shame! DC
Hello. Great question, what's more I think it's even a greater suggestion. But unfortunately it is like you say, money motivates all business decisions. We will have to see if someone answers the call and makes ball bearing version. Thanks for the feedback.
Hi, my door opens, bounces, off the motor, and closes up. What can I do??? TX u I'm advance.
Hello. Does your garage door seem heavy?
The nylon gear "usually goes wrong" because it IS SUPPOSED TO GO WRONG which is why they
make ti out of soft nylon instead of metal!
It will always wear out making the customer have to purchase a new gear assembly!
Well ... you're not wrong.😂
I've taken out some old Craftsman openers made by Chamberlain that had a metal gear. The ones they make now are shit. DC motor and no sprocket gear assy like the old ones. KEEP YOUR OLD OPENERS. New ones are WEAK.
there must be a sudden influx in Chamberlain gears stripping considering this is a 3 week old video and almost 1000 views 🤷🏻♂️🤷🏻♂️🤷🏻♂️
A 😷 😂🤣🤣😂
The Muzzle wearer calls us "party people" ?
Less than no help at all. Talk Talk Talk. No tapping of the Subscribe for me.
Hello Papi Rob! Thanks for the feedback. Here's another video that might be what you are looking for:
th-cam.com/video/CdEG1pNOOg0/w-d-xo.html
This video would be 5 minutes if you didn't talk and joke so much. Just the necessary facts please.
good job again!
Working outside or in a garage wearing a sheep mask ,,yeah im gonna take advise from you
Right? Lol😅