MECTOR0734 is an emergency start handle (e-handle) assembly in the R5-EHS 3L3 + Schneider configuration, sized for 115 A–225 A starters. The e-handle is the mechanical emergency-start mechanism on a fire pump controller: pulling the handle physically closes the motor contactor so the pump can start even if the controller's electrical start circuit is out of service.
Replace the assembly if the handle is bent, binds, or no longer fully engages the contactor mechanism — an emergency start that cannot be operated defeats the purpose of the feature and is a common inspection finding. This listing is the complete handle assembly, not the contactor itself.
This is the R5-EHS 3L3 + Schneider variant for 115–225 A; two other e-handle assemblies (MECTOR0156 and MECTOR0157) cover different starter ranges, so match the assembly to your contactor before ordering. Veteran-owned Cybertronic Controls in Hammond, Louisiana can confirm the correct variant — call 985-351-5681.