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This manufacturer approved gear and sprocket assembly (part number 41C4220A) fits many garage door openers, including Craftsman garage door opener model 13953225SRT. This gear and sprocket assembly also fits certain Chamberlain and LiftMaster garage door openers.
The gear and sprocket assembly includes the following:
- Helical gear with retainer
- Drive gear
- Worm gear
- Spring washer
- Thrust washer
- Retaining ring
- Bearing plate
- 2 roll pins
Unplug the garage door opener before installing the gear and sprocket assembly. Adjust the up and down travel limits according the instructions in your owners manual after installing the gear and sprocket assembly.