Liftmaster Service Kit
Chamberlain Liftmaster service kit to suit chain drive models 4410/4210/4400/3750 and most motor lift models.
It will also suit Garador auto door which was under the brand name of Chamberlain Liftmaster.
KIT INCLUDES: gear, shaft, sprocket, worm wheel and rail grease.
For reference: the diameter of the drive gear shown bleach white. is 2-3/4 inches.
Chamberlain part number: 041A3261-1