Garage Door Chain Sprocket Broke

If the gear and sprocket assembly breaks the motor runs but the door won t move.

Garage door chain sprocket broke.

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. This was a craftsman model 139 53976srt. After several years the garage door springs become weaker causing more stress on this particular part causing it to fail and wear out.

Liftmaster and chamberlain garage door openers are very common for this. The gear and sprocket assembly is inside the cover of the garage door opener motor. 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.

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. This is a video on how to change the gear sprockets in a craftsman garage door opener. The most common cause of a chain being loose and appearing broken is a broken gear and sprocket.

Documenting how i repaired the garage door. This can be easily replaced by a garage door service technician. Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door. One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket.

Chain drive garage door openers have a sprocket that is attached at the top of the motor.