Garage Door Opener Gear Broke Off

The chain got loose and popped off the gear.

Garage door opener gear broke off.

Documenting how i repaired the garage door. After several years the garage door springs become weaker causing more stress on this particular part causing it to fail and wear out. The gear on the top of the machine that cranks the chain has sheered off and is broken. One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket.

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. I want to know if it is cheaper to fix this machine or to buy a new one. Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door. You can put the chain back on your automatic garage door opener using a simple adjustment mechanism.

It was a perfect replacement and the garage door is working. I am not a professional. This is a video on how to change the gear sprockets in a craftsman garage door opener. The bag said it was an oem piece.

You will need to check the internal components of your garage door opener. 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. How can i fix this.

If your garage door opener craftsman liftmaster chamberlain genie sommer decko has no power but it is plugged in the circuit breaker is on and you know for sure the electrical outlet has power then there is something in the garage door opener that is faulty there is an electrical issue in the opener. And is not under warranty. Chain driven garage door openers should have some slack in the chain for optimal performance. If the gear and sprocket assembly breaks the motor runs but the door won t move.

My garage door opener is broken. This was a craftsman model 139 53976srt. This is the part that connects the motor to the chain or belt. The opener is a craftsman 1 2 h r.

Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets. Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door. Report this by manage my life.