Check the breaker controlling the door opener and.
Garage door opener loose sprocket.
Disconnect the power cord from your door opener before doing any kind of repair.
4 6 out of 5 stars 40.
This repair guide and video show how to replace a chain drive garage door opener gear and sprocket assembly.
If you replace the sprocket assembly in your chain drive garage door opener yourself you may be able to save a lot of money.
Replacement gear and sprocket for liftmaster garage door openers 41c4220a 4 9 out of 5 stars 39.
Make basic checks first.
Ensure that the unit is plugged in the door isn t locked and if you are using a remote that the remote has batteries.
If your garage door opener s motor runs but the chain doesn t move the gear and sprocket assembly might be broken or worn.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.
The process isn t as hard as you may think so consider the guide below.
Step 1 turn off the power.