LiftMaster 041C4220A Gear and Sprocket Kit (41C4220, 41A2827) - AC Chain Drive Garage Door Openers 1993 to Present: LiftMaster, Chamberlain, Craftsman

Genuine LiftMaster 041C4220A gear and sprocket kit — also written 41C4220A, 41C4220 and, by its earlier number, 41A2827. The complete drive gear set for the AC chain drive garage door openers LiftMaster, Chamberlain and Craftsman have built since 1993: helical drive gear with retainer, worm gear, output shaft with sprocket, bearing plate, spring and thrust washers, retaining ring, roll pins and a packet of gear grease. When the motor runs but the chain does not move and there is white or brown plastic dust inside the cover, this is the kit.

Specifications

Openers it fits

Is the gear kit the problem?

A worn gear is easy to confirm. Open the cover and look:

Fitting

Unplug the opener and disconnect the chain at the trolley. Remove the cover, the light socket panel and the chain sprocket; drive out the roll pins and lift the old gears and shaft out. Fit the new worm gear and helical gear with a generous coat of the supplied grease, refit the shaft, sprocket and pins, and re-tension the chain. Replace the roll pins if they are loose — a loose pin will strip the new gear in a month. Re-learn the limits and force before leaving.

Related

41C4220A aftermarket kit · 041A6689 trolley threaded shaft · all LiftMaster opener parts · Chamberlain opener parts · Craftsman opener parts

Not sure whether your opener is AC or DC? Send the model number from the label on the head to parts@gatehousesupplies.com or call 866-965-5599. We would rather confirm it than have you order twice.