Garage Door Chain Sprocket Broke

This can be easily replaced by a garage door service technician.

Garage door chain sprocket broke.

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. Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door. Liftmaster and chamberlain garage door openers are very common for this. This is the part that connects the motor to the chain or belt.

If the gear and sprocket assembly breaks the motor runs but the door won t move. Chain drive garage door openers have a sprocket that is attached at the top of the motor. Chain driven garage door openers should have some slack in the chain for optimal performance. One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket.

The most common cause of a chain being loose and appearing broken is a broken gear and sprocket. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. Your garage door opener has a gear and sprocket that will eventually fail. It was a perfect replacement and the garage door is working.

The bag said it was an oem piece. Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets. This gear set worked great and replaced a broken one in my 2002 1 2 hp chamberlain liftmaster yesterday. This is a video on how to change the gear sprockets in a craftsman garage door opener.

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 and sprocket assembly is inside the cover of the garage door opener motor.