Model # CG40D

Internet #202413356

Chamberlain 1/2 HP Chain Drive Garage Door Opener-DISCONTINUED

Discontinued Chamberlain

1/2 HP Chain Drive Garage Door Opener-DISCONTINUED

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Frequently Bought Together

Product Overview

The CG40D 1/2 Hp chain drive is steady and reliable. Its durable 1/2 Hp motor and chain drive provide continual steady performance. This model has earned the good housekeeping seal. Quick-install rail system provides faster and easier installation and assembles in 60 seconds.

  • Delivers 75 watts of light with adjustable light time delay
  • Includes one single-button remote control and an illuminated door control button
  • Home Link compatible with the in-vehicle remote control system
  • 1/2 HP motor with industrial-strength, rugged chain drive
  • Quick-and-easy-to-install 5-piece rail system fits most garages with 7 ft. high garage doors. Extension kits are required for garage doors that are 8 ft. (model 7708CB) or 10 ft. (7710CB) in height

Info & Guides

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Name 1/2 HP Chain Drive Garage Door Opener 1/2 HP Chain Drive Garage Door Opener-DISCONTINUED 1/2 HP DC Chain Drive Garage Door Opener Excelerator 1 HPc Direct Screw Drive DC Garage Door Opener
Brand Chamberlain Chamberlain SkyLink Genie
Ratings (274) (238) (9) (147)
Garage Door Opener Horsepower (hp) 1/2 hp 1/2 hp 1/2 hp 1 hp
Included Remote Control Remote Control Remote Control Remote Control
Features Homelink Compatible,Lights,Manual Release Handle,Safety sensor Homelink Compatible,Lights,Manual Release Handle,Safety sensor Homelink Compatible,Lights,Manual Release Handle,Safety sensor Homelink Compatible,Illuminated Wall Control,Lights,Manual Release Handle,Safety sensor,Wireless keypad
Opener Type Chain Drive Chain Drive Chain Drive Screw Drive
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Warranty / Certifications

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Customer Questions & Answers

my 1/2chain Drive Garage Door Opener will not go up chain go around but door will go up HELP PLS/

Asked by: Anonymous
Is the chain actually moving? If it is then your trolley isn't locking in. Check the trolley release arm and make sure it it's in the horizontal position. If it's just the motor running but the chain isn't actually moving then the main "nylon" drive gear is probably broken or shredded. I had that happen. If it's broken you can replace the gear for about $15.00. If it's shredded (like mine) I don't know if I would bother. I replaced the gear on mine and it just shredded it again. So that would mean, also replacing the worm gear and drive gear. If it shredded it again then that would mean one or both (drive gear shaft; worm gear shaft) of the drive shaft(s) are out of alignment or bent. You see where this is going?
Answered by: Jake
Date published: 2015-09-17

My remote stopped working.

I changed the batteries and it still will not operate. The garage door can be opened and closed by the wall panel but not the remote. What can I do? Can I replace the remote? If I do how do I set it so that it will open my garage door?
Asked by: Anonymous
if your door does nothing when you press the remote, and you changed the battery and the battery is in the right direction. you must code the remote to the opener. You may need a ladder to do this...on the back of the opener is a little button i don't know the color of yours, it could be green or purple or red. but you must press this button.. just press 1 time let go then press the button on your remote, the opener will make a click noise. that lets you know your remote is now programed. if this does not work. your remote is in need of replacement . follow the same steps with the new remote. hope this helps...goodluck ...AL
Answered by: algio
Date published: 2015-09-17

will this opener work on a 16' X 7' tall door

Asked by: Anonymous
Yes as long as your springs can support the weight of the door.
Answered by: Bill
Date published: 2015-09-17

Do the garage door kit also come with the rails

Asked by: Anonymous
Answered by: rick
Date published: 2015-09-17
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Customer Reviews

1/2 HP Chain Drive Garage Door Opener-DISCONTINUED is rated 4.5 out of 5 by 238.
Rated 4 out of 5 by from quite simple to install and works purchased this to replace an older model, this one being the exact same but updated, so same size opener made an easier install. everything was in the box except for 10 staples. I would recommend following the instructions exactly, unpacking everything first and laying everything out as the diagrams in the manual, also get all the tools you need in a handy location, it is possible to install on your own as long as you have a stepladder of a suitable height, but another person will make the process quicker, read the instructions carefully when making the adjustments and don't rush. I was able to use existing wiring and support brackets which made things easier and quicker. Unfortunately the price has just been lowered by $20 which is not good news for me.
Date published: 2012-07-18
Rated 5 out of 5 by from My old one died I ordered on line that night. If arrived before the weekend and I put it up myself in an afternoon! Sweet Only section in all of the instructions was unclear. Hint keep the foam around the motor until you are ready to actually hang it up. ( that thing is tough) Even setting up the safety features and travel was all in easy steps.
Date published: 2012-06-29
Rated 5 out of 5 by from Good product, good price The only thing I could fine wrong was that it only came with one remote for the car.
Date published: 2012-06-20
Rated 5 out of 5 by from Like the photoeye safety. Found it to be easy to assemble without much difficulty. Since I had added the extension kit for the 10 feet door laying all the pieces out it was easy to see what would be used and what would not be. It took about three hours to get it assembled and mounted using only myself. It would have been a lot easier if I had had someone to help but by being creative was able to do it without much or problem. Adjusting travel limits were easy with a small screwdriver. The very first time I used it my dog ran under the door as it was closing. The photoeye tripped and reversed the door so it did not hit my dog.
Date published: 2012-12-18
Rated 4 out of 5 by from Good basic opener. The opener has only one remote and a basic wall switch. It works for me, only because it's in a 3rd stall garage and isn't used much. Quieter then I expected for the price. Easy set-up.
Date published: 2012-06-19
Rated 4 out of 5 by from Great value, good install, needed replacement part, see review... I chose this CG40D garage door opener because I was replacing my old Chamberlain garage door opener, almost the exact same model, that lasted 18 years. If you have read other reviews on this site, you will notice that some of the reviewers stated that the chain that came with the opener was not long enough - one reviewer even went so far as to cut the track to meet the length requirements of the chain. This would not be necessary if he had called Chamberlain (the support telephone number is included on several documents). During my install process, I also discovered that the chain was too short. I called Chamberlain, and they did confirm that some CG40D models did in fact go to retail with short chains. They were extremely apologetic, and were completely honest and forthcoming about their own error. They asked me for the serial number, and sent me a new chain with overnight delivery, which I found to be a very reasonable and responsible solution. Perhaps this known error is why this opener is such a good price at this time, as they want the customer to feel that they have been fairly treated when they made this error. Given the excellent price and quality of the opener, I was satisified with their response. As for the installation, one person can definitely do the job, as I did. The instructions were well laid out, with clear diagrams, and in the correct sequence. Of course, if you are not the type who enjoys such projects, or does not have any experience with tools and mechanical items, I would suggest getting an experienced helper, or hiring someone to install it. Measurements must be precise. I installed it in my detached garage, so noise is not an issue for me (I do not have to worry about waking anyone up with vibrations throughout the house when using it). I find the noise level to be fine, much quieter than other items in my garaqge, such as an air compressor, or starting up my tractor or other small engine equipment. I am using this opener with a heavier style garage door (Clopay Premium Series 9' X 7' model 2050, also bought at Home Depot). The CG40D garage door opener is more than adequate for this door. My two most important recommendations would be to (1) before the day that you plan to install it, assemble the rail, trolley and "U-bracket" (you will see what those are in the manual), lay it or bolt it together on the motor housing, before getting too far into the install, and wrap the chain around the assembly to determine if the chain is the correct size (if it is too short, the chain will not reach from one end of the trolley to the other) . If it is not, call Chamberlain right away, so you can have the correct chain sent to you immediately, so that you may complete the installation. And, (2), be very precise with your measurements. If your measurements are not precise, you will have problems down the road, as the unit will be under undue stress. Also, a tip, per the instructions, do not install the electric eye sensors to be located in direct sunlight. From previous experience, this will cause the opener to "think" that there is something in its path, and the door will not close without manual intervention. I would definitely recommend this product - a great value. I rate it 4 stars instead of five, as I thought it should have included a couple extra 2" lag bolts, and more importantly, a second remote control for the opener.
Date published: 2012-02-06
Rated 4 out of 5 by from Very nice product I replaced a Genie screw-drive door opener with this unit and could not believe how much smoother and quieter it was. It works great, and in contrast to another review on this site I found the installation to be pretty straight forward and easy.
Date published: 2011-12-21
Rated 5 out of 5 by from A review I read before purchase made this easy - RTB, RTB, (Read the Book) Good luck if you skip this! Low price a consideration, We were not pleased with the death of our old unit ( 10 yrs old ) which coinsided with our A/C failures unexpected expense. After I assembled & installed this unit ( easy, I'm 73, took my time & did it alone ) I was amazed - Quiet & smooth, Handles our solid wood door w/ease. We are very pleased & will recommend this unit for any single car garage.
Date published: 2012-06-13
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