Garage Door Chain Sprocket Replacement

This is a video on how to change the gear sprockets in a craftsman garage door opener. Amazon s choice for craftsman garage door sprocket replacement for liftmaster 41c4220a gear and sprocket kit fits chamberlain sears craftsman 1 3 and 1 2 hp chain drive models 4 8 out of 5 stars 1 216. Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.

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This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.

Garage door chain sprocket replacement.

This was a craftsman model 139 53976srt. Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door. The process isn t as hard as you may think so consider the guide below. If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.

Chain drive garage door openers have a sprocket that is attached at the top of the motor. Step 1 turn off the power. If the gear and sprocket assembly breaks the motor runs but the door won t move.

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