Compatible with chain drive units from liftmaster, chamberlain, craftsman, sears, master mechanic and Wayne Dalton. Compatible with 2245, 2255, 2265,, pd210, pd212, pd610, pd612k, 1200 series, 1240, 1245,, 1246, 1250,, 1255,, , 1256, 1260,, , 1265 and more. Not all models listed. This kit includes all of the 41A2817 Drive / Worm Gear kit, and is easier to install because you do not have to disassemble the output shaft assembly - the spur gear is already mounted on the new output shaft. The 41C4220A assembly also includes the worm gear, and a new bushing under the sprocket which is another common wear item. Fits most chain drive openers manufactured since 1984 by: Liftmaster, Chamberlain, Sears Craftsman, Master Mechanic, and some units from Wayne Dalton.
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