Follow the steps in this repair guide and video to replace the gear and sprocket assembly in craftsman chamberlain and liftmaster chain drive garage door openers.
Garage door opener drive gear replacement.
Kipa pack 3 drive gear for sears crafsman liftmaster chamberlain garage door openers 1984 up 41a2817 41c4220a 81b0045 drive gear 32 teeth bore size 1 2 durable top quality 4 7 out of 5 stars 14 9 75 9.
Shredded plastic gears are a common problem with chain driven garage door openers.
So if you suddenly find that the motor on your garage door opener sounds like it s running but the door is not moving checking for worn gears is the first thing you should do.
Replacement gears and sprockets for genie model garage door openers.
See full descriptions for garage door opener compatibility by model numbers.
The drive gear is designed as a sacrificial part and will shred when ever unusual stress or strain is placed on the door or opener.
Fortunately the repair is neither difficult nor expensive and it should only take an hour of your time.
This was a craftsman model 139 53976srt.
Replace a broken gear and sprocket assembly with the manufacturer approved replacement part.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
Genuine genie replacement belt and chain drive sprockets main drive gears and more.