The LiftMaster 41A5434-11A Full 7' Belt Assembly is a genuine OEM replacement for select LiftMaster belt-drive garage door openers configured for a 7-foot door. Used to replace a worn, stretched, or broken drive belt, it restores smooth, quiet operation and reliable movement of the trolley along the rail. This factory part is intended for residential belt-drive operators that specifically list 41A5434-11A in their owner’s manual or parts diagram, making it an ideal replacement part for maintaining performance and reducing vibration in compatible LiftMaster systems.
Engineered for standard 7-foot rails, this assembly is not interchangeable with 8-foot or 10-foot extension rails and must be matched to the opener’s exact model and rail type. Typical installation steps include disconnecting power, releasing the trolley, routing the belt over the motor sprocket and through the rail, attaching it to the trolley, and setting proper belt tension; afterward, travel limits and force settings may need to be readjusted per the opener’s instructions. For compatibility, verify that your specific LiftMaster model calls for part number 41A5434-11A before ordering. Observe all safety precautions: unplug the opener, keep clear of moving components, and do not attempt any door spring or counterbalance work while replacing the belt.
Compatible with LiftMaster 7' belt drive models: 2280, 2500, 2500B, 2500D, 2580, 2585, 3280, 3280M, 3500, 3585 and 3850