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Bard part 8602-078BX is an OEM crank arm used in the intake damper linkage on Bard wall mounted MEGA-TEC equipment, providing the mechanical connection that transfers actuator motion to the damper rod and blades for proper outside air and ventilation control. If your economizer or intake damper is not opening, closing, or tracking correctly due to a worn or bent linkage arm, replacing the crank arm can help restore smooth damper operation and maintain the unit’s intended airflow and control response. This is a genuine Bard replacement part intended to match factory fit and function, and verifying your model and damper assembly drawing is the best way to confirm compatibility before ordering.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.