This is a video on how to change the gear sprockets in a craftsman garage door opener.
Garage door opener drive gear replacement.
This was a craftsman model 139 53976srt.
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.
See full descriptions for garage door opener compatibility by model numbers.
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.
Genuine genie replacement belt and chain drive sprockets main drive gears and more.
If the gear and sprocket assembly breaks the motor runs but the door won t move.
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.
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.
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.
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.