Abstract: A retainer plate connects first and second fluid lines to spaced apart first and second ports in a manifold. The retainer plate has first and second openings spaced apart the same distance as the ports for receiving the respective first and second fluid lines. A fastener secures the retainer plate to the manifold with the first opening aligned with the first port and the second opening aligned with the second port. The fastener is eccentrically located so that it cannot be secured to the manifold with the first opening aligned with the second port and the second opening aligned with the first port, thus insuring that the two lines are not connected to the wrong ports.

Abstract: An extendable and retractable hydraulic actuator has a housing that defines an internal bore within which a piston and rod are arranged to move longitudinally. According to the hydraulic pressure on either side of the piston, the piston is forced back and forth in the bore causing the end of the actuator to either extend or retract. The bore has dual inlet and outlet ports, normally at one end of the actuator, such that one inlet port causes fluid to enter and force the rod in one direction while fluid from the other port flows to an opposite end of the actuator through channels within the housing and enters the bore on the opposite side of the piston forcing the piston to move in the opposite direction. A swing plate that pivots about one of the quick connection fittings secures the fittings to the housing.