The LiftMaster 41A5658 Gear and Sprocket Assembly is an OEM replacement drive component for select LiftMaster and Chamberlain residential chain‑drive garage door openers, and many compatible Sears Craftsman units manufactured by Chamberlain. This assembly mounts at the top of the opener head and transfers motor power to the drive chain, restoring lifting performance when the original gear teeth have worn down or the sprocket has failed. It is commonly used to resolve symptoms such as a running motor with no chain movement, grinding noises, or intermittent operation, helping return the opener to smooth, reliable service.
Compatibility is model‑specific: use this part only on openers whose parts diagram or service manual specifies 41A5658. It is intended for chain‑drive trolley openers and is not for belt‑drive or screw‑drive systems. Installation typically involves unplugging power, pulling the emergency release, removing the opener cover, relieving chain tension, swapping the assembly, re‑tensioning the chain, applying fresh lubricant as directed, and recalibrating travel and force limits per the manufacturer’s instructions. For safety, disconnect power before service, secure the door in the down position, and verify proper chain alignment and limit settings after replacement. This genuine LiftMaster gear and sprocket assembly is a practical replacement part for homeowners or technicians performing a repair or overhaul on compatible LiftMaster, Chamberlain, or Craftsman chain‑drive garage door opener models.
Compatible with LiftMaster 2595, 3595 and 3595S models