The LiftMaster 109B33 Trolley Belt Clip is a genuine OEM replacement part designed to secure the drive belt to the trolley carriage on compatible LiftMaster belt-drive garage door openers. By locking the belt to the moving trolley, it ensures smooth, reliable travel of the door and proper opener performance. This clip is typically replaced during belt changes, trolley repairs, or whenever the original connector is worn, bent, or missing, restoring correct belt-to-trolley engagement on residential belt-drive systems.
Use this part only where specified by LiftMaster; verify compatibility by checking your opener’s owner’s manual or exploded parts diagram for part number 109B33. Installation is mechanical and does not require programming: disconnect power, secure the door, release belt tension per the manufacturer’s procedure, attach the clip to the belt and trolley as directed, and re-tension the belt to specification. For safety, keep hands clear of moving components and follow all LiftMaster service instructions. This OEM trolley belt clip is an ideal replacement for maintaining dependable operation of LiftMaster belt-drive garage door opener rails and trolley assemblies.