A manifold actuator assembly (110) is provided with a manifold (114) comprising a block, and a hydraulic actuator (116) connected to a solenoid valve (118) within the block. The solenoid valve (118) controls hydraulic, linear movement of a rod (122) of the hydraulic actuator (116). The manifold actuator assembly (110) may be used in a metering system (20) to open and close movable gates (100) disposed downstream from a meter roller (72) before product enters a distribution system (22). The manifold actuator assembly (110) may also be used as a locking apparatus to lock and unlock members (141, 142) in a wide variety of applications.
