The opener is a craftsman 1 2 h r.
Garage door opener gear broke off.
Report this by manage my life.
My garage door opener is broken.
This was a craftsman model 139 53976srt.
You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
You will need to check the internal components of your garage door opener.
Documenting how i repaired the garage door.
The chain got loose and popped off the gear.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
It was a perfect replacement and the garage door is working.
The bag said it was an oem piece.
I am not a professional.
It wasn t listed for the same model but after looking online it seems that most garage door openers made after 1984 use the same sprocket assembly.
One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
Chain driven garage door openers should have some slack in the chain for optimal performance.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
This is a video on how to change the gear sprockets in a craftsman garage door opener.
This gear set worked great and replaced a broken one in my 2002 1 2 hp chamberlain liftmaster yesterday.
This is the part that connects the motor to the chain or belt.
And is not under warranty.
The gear on the top of the machine that cranks the chain has sheered off and is broken.
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.
Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
I want to know if it is cheaper to fix this machine or to buy a new one.
