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Bard part number 8602-075 is an OEM direct coupled actuator used on select Bard wall-mount HVAC systems to drive an outdoor air or return air damper shaft without external linkage. When this actuator starts to fail, you may see dampers not opening or closing fully, inconsistent ventilation control, or improper economizer operation, all of which can affect comfort and equipment performance. Replacing it with the correct Bard OEM actuator helps restore accurate damper positioning and dependable airflow management, and it is a smart choice when you are servicing Bard ventilation or economizer assemblies and need confirmed fit with the original damper shaft and mounting style.