The LiftMaster 041D7440 Motor Assembly is a genuine OEM replacement motor designed for select LiftMaster residential garage door openers that require a 1/2 HP AC drive. It restores proper lifting power and smooth operation when an original motor has failed or become noisy, maintaining the opener’s factory performance for sectional overhead doors. Engineered for LiftMaster AC platforms, this assembly installs within the opener head and is intended for use only on models that specifically list 041D7440 in their parts diagram.
This 1/2 horsepower AC motor is built for North American openers operating on 120V, 60 Hz and is not compatible with LiftMaster DC-motor units. For best results, disconnect power before service, follow the manufacturer’s service manual for removal and reinstallation, and re-set travel limits and force adjustments afterward. Perform a safety reversal test with properly aligned photo eyes to confirm UL 325 compliance. Compatibility varies by opener model; always verify by checking your opener’s exact model number and parts list to ensure that 041D7440 is the specified replacement motor assembly.