A push pull coupler for hydraulic or other line that pivots about two axes in response to a predetermined tensile force exerted by a line connected to an adapter of the coupler, so that a face of the adapter is normal to the predetermined tensile force. A tensile force greater than the predetermined tensile force causes the disconnection of the line from the adapter. In one embodiment, a second push-pull coupler pivots around a third axis different from the first and second axes, responsive to a second predetermined tensile force that doesn't have to be parallel to the first predetermined tensile force. The faces of the couplers' adapters therefore become normal to the respective tensile forces exerted on them prior to disconnection of the lines.