This video from Sears PartsDirect shows how to replace the gear and sprocket assembly on a chain-drive . ANG 20242WGREASE Drive Gear with Grease for Sears Crafsman Liftmaster Chamberlain Garage…. . Liftmaster/Chamberlain- Sears/Craftsman 41a4885-2 Genuine Replacement Part Gear and Sprocket…. . Compatible with chain drive units from LiftMaster, chamberlain, craftsman, sears, master . Find helpful customer reviews and review ratings for Liftmaster 41c4220a Gear and Sprocket Kit for Chamberlain, Sears, Craftsman and LiftMaster 1/3 and 1/2 . A garage door opener that hums or grinds but doesn't open the door may just have stripped gears-an easy, inexpensive repair. Use this guide to get your open. Garage Door Solutions offer garage door opener stripped gear services for both . openers also have limits especially in their essential components and gears. Apr 20, 2018 - Shredded plastic gears are a common problem with chain-driven garage door openers. Fortunately, the repair is neither difficult nor expensive, . We service ALL makes and models, including LiftMaster, Chamberlain, . most often caused by stripped gears on certain components in the garage door opener. . Again, an onsite inspection is essential to determining exactly which parts are . We use the best parts when it comes to garage door opener installation. Call RJ . Having a garage door is an essential part of your home. . On chain drive garage door openers it's not uncommon to have a broken sprocket or stripped gears. Free Shipping. Buy 41C4220A Liftmaster Gear and Sprocket Kit at Walmart.com. . Household Essentials · Laundry RoomKitchenBathroomPaper .