See full descriptions for garage door opener compatibility by model numbers.
Garage door opener drive gear replacement.
Replacement gears and sprockets for genie model garage door openers.
Replace a broken gear and sprocket assembly with the manufacturer approved replacement part.
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.
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.
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 37 9 75 9.
Genuine genie replacement belt and chain drive sprockets main drive gears and more.
The teeth of the 41a2817 drive gear must be coated with a low temperature lithium based grease prior to operating your door opener or the gear will quickly shred.
Shredded plastic gears are a common problem with chain driven garage door openers.
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.
This is a video on how to change the gear sprockets in a craftsman garage door opener.