Works with the following Liftmaster, Sears, Craftsman and Chamberlain operator model numbers: WD822K, WD822KS, WD822KD, 4799SD, WD912K, WD912KS, WD922K, HD600, 2585, 3585, 2580
Belt Drive Models OnlyIf your belt pulley is a 14 cog this is the correct kit repair kit for your opener. If you have a 9 cog you need part number 41A4885-2
