Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
Garage door opener loose sprocket.
This repair guide and video show how to replace a chain drive garage door opener gear and sprocket assembly.
Replacement gear and sprocket for liftmaster garage door openers 41c4220a 4 9 out of 5 stars 39.
Make basic checks first.
If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.
Disconnect the power cord from your door opener before doing any kind of repair.
Check the breaker controlling the door opener and.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
Ensure that the unit is plugged in the door isn t locked and if you are using a remote that the remote has batteries.
The process isn t as hard as you may think so consider the guide below.
Gear sprocket kit door opener gear kit 1 3 1 2hp liftmaster sears craftsman garage door opener part.
If your garage door opener s motor runs but the chain doesn t move the gear and sprocket assembly might be broken or worn.