This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
How to get chain on gear garage door opener.
Disengage the garage door from the opener by pulling down on the emergency pull cord to release the door trolley from the opener carriage.
As a homeowner knowing the correct type of lubricant for the chain.
I replaced just the main gear with the sprocket and shaft assembly for 25 or so from a supplie.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
Press the wall control button or remote so that the opener completes its close.
Should i get a chain or belt garage door opener.
Although there are more designs available chain drive and belt drive openers are the most popular models in australia.
Https amzn to 2uwvnkj i m working on a chain drive opener.
A new front sprocket costs about 150 200 include the labor to install it.
This gear kit on amazon.
The chain wraps around this sprocket as well as the gear and sprocket at the motor.
If you are not confident in your ability to diagnose the problem call a local garage door service company.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
Periodic maintenance of a liftmaster chain driven garage door opener includes lubricating the chain and greasing the chain rail.
This was a craftsman model 139 53976srt.
Sprocket is at the end of the opener rail closest to the garage door opening.
If yours is a belt drive you need a kit like this https amzn to 2zqns.
My sears chain drive garage door opener s main gear is worn.