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Technical
- Works with the following Liftmaster, Sears and Chamberlain models 3280, 2280, 8100, 8100M, 8200, 9200, 1270, 1280, 1280R, 139.53964SRT, 139.53914, 139.53984SRT, 139.53664SRT2, 139.53800SRT, 139.53954, 139.54678SRT, 139.53678SRT, 139.53916D, 139.53914D, 139.53915D
- Replacement gear and sprockets are no longer manufactured for garage door openers made prior to 1984.
Belt Drive Models Only
- If your belt pulley is a 9 cog this is the correct kit repair kit for your opener. If you have a 14 cog you need part number 41A4885-5
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