The main drive gear is the plastic gear that comes in direct contact with the worm drive gear on the motor.
How to fix garage door opener chain.
Chain driven garage door openers should have some slack in the chain for optimal performance.
Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
In this case the cable can be replaced fixing the problem.
After close examination we found the chain was off track.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
The reason the chain went off track was because the chain.
Having an automatic door opener in your garage is a great convenience but you have to give the opener and all its parts regular.
Garage door opener won t open all the way fix.
How to fix a chain drive garage door when it won t open.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
Replace the main gear drive if the garage door opener makes a grinding noise but the door doesn t move your main drive gear is probably toast.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
A garage door opener chain may make a lot of noise when you pull it to open your door but it is one of the most reliable types of door openers ever invented.
Garage door didn t open in the morning.
You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.
Garage door opener is very strong and seldom does the chain actually break.