The Marantec 91568 Sprocket Holder Assembly is a genuine OEM replacement component for select Marantec residential garage door openers. Positioned at the operator head where the rail interfaces, this assembly supports and retains the drive sprocket so the belt or chain stays aligned and transfers motor torque smoothly. Use it to restore proper tracking and quiet, reliable movement when the drive sprocket support is worn or damaged. Compatibility is model-specific; confirm the part number 91568 against your opener’s parts diagram or service manual to ensure it matches your rail style and head unit.
Installation typically involves disconnecting power, removing the operator cover, relieving belt/chain tension, swapping the holder assembly, and re-tensioning the rail before testing. After replacement, verify door travel, safety reversal, and force limits, and reprogram limits if they were disturbed during service. For safety, work with the door in the down position, secure the door if springs are compromised, and follow Marantec service procedures. This OEM sprocket holder assembly is intended for use as a direct replacement part on select Marantec belt- and chain-drive systems and is suitable for residential garage door opener repairs where the original 91568 component is specified.