The SOMMER 40040 Straight Door Arm is a genuine OEM replacement linkage that connects the opener carriage to the garage door as part of the two-piece arm assembly. Used on selected SOMMER residential operators, this straight arm provides the push/pull action needed for smooth opening and closing when paired with the curved door arm per the opener’s installation manual. Its pre-drilled hole pattern supports standard door mounting geometry, helping maintain proper travel and alignment on typical sectional and one-piece door applications.
Designed for compatibility with select SOMMER Direct Drive and pro+ systems in North America, the 40040 Straight Door Arm is ideal for repairs, replacements, or upgrades where the original arm has worn or been damaged. No programming is required; installation involves mechanical attachment to the trolley and the mating curved arm using the specified pins and fasteners from the opener kit. Always disconnect power and secure the door before service, verify part number 40040 in your operator’s parts list, and adjust travel limits and force settings after installation to ensure safe, reliable operation.