The Marantec 8030735 Straight Door Arm is a genuine OEM replacement component for Marantec garage door openers that use a two-piece door arm assembly. This straight arm links the opener trolley to the top section of the garage door, creating the rigid connection needed for smooth lifting and controlled closing. It is typically paired with the curved door arm in the assembly and is ideal for restoring proper operation when the original arm is bent, worn, or damaged.
Use this part on Marantec operators that specifically list 8030735 in their parts diagram or manual; always verify compatibility by checking your opener’s documentation or the label on the existing arm. Installation is straightforward with basic hand tools: disconnect power, place the door in the down position, pull the emergency release, then attach the arm to the trolley and door bracket using the appropriate clevis pins and retainers. After reconnection, test travel and force settings and confirm the safety reverse system functions correctly. This OEM Marantec straight door arm supports dependable performance on residential sectional garage doors and serves as a direct-fit replacement part for maintenance or repair.