Abstract: An apparatus for actuating and locking pairs of hopper doors of a railroad hopper car of the type having a longitudinal center sill and pairs of longitudinally extending chutes, located opposite each other and on each side of the center sill, configured to discharge lading to each side of the hopper car, and each provided with a hopper door. Each chute of a pair is provided with a longitudinally extending shaft rotatively mounted on the underside thereof with first and second end portions extending beyond its chute. Both end portions of the shaft have an operating cam assembly non-rotatively mounted thereon and connected to the adjacent hopper door by an operating link. The operating cam assemblies at corresponding ends of the shafts are joined by connecting links. The first end of each shaft has a ratchet wheel and a capstain non-rotatively mounted thereon. Each chute of the pair has a ratchet pawl pivoted thereto and cooperating with its respective ratchet wheel.