An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert whose answer got voted for 20 times.
An expert who has answered 20 questions.
Re: Chewing up Chain Drive
There is most likely a problem with the balance of the door. Release the door from the opener by pulling the red handle and lift the door manually. You should not have to apply more than 20lbs to lift it. When the door is at each hinge point and all the way up, it should stay by itsself. If it does not, the springs need to be adjusted or you will continue to replace gears.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
This means that the nylon drive gear in your unit has been stripped. This can be replaced and is common in openers. You can get a replacement at chamberlain.com. It does take moderate skill to do and should take about an hour to complete. You can order the gear by itself or the whole drive shaft. Make sure and set the limits per the manual and do a 2x4 safety reversal test afterward. Thanks BB
The easiest way to fix this would be to take the chain off the sproket with the door and the trolley in the down position. Next hit the wall button and pay attn. to weather the gear is turning clockwise, you want it to turn that direction, wait until the unit stops by itself, next put the chain back on and now you should be able to adjust the limits. otherwise you should call a local professional. They will usually service your door as well as fix your opener.
Sound like the "outfit" that worked on your operator did not change the
bottom bushing on your motor mounting plate. Some "outfits" only change
the white gear #41A2817 and some change the gear shaft assy. #41C4220A without changing the bottom bushing.
I have the same problem. I just removed the cover and discovered a nylon gear had been worn out. I found lots of shavings inside the cover. The nylon gear is beneath the exterior chain gear. I am looking for information on how to replace it, if I can find the part. If you decide to look at yours, unplug the power and remove the sheet metal screws securing the bottom portion of the cener cover to the front and back covers. Then just remove the upper screws from the center cover. Good luck.
Take the back cover off and see if the Gear that turns the shaft that operates the chain to lift or close is in good condition.
The gear is probably plastic and 3" or 4" in diameter.
UNPLUG THE OPENER AND DISCONNECT THE POWER BEFORE DOING THE ABOVE.SAFETY IS ALWAYS FIRST.