Abstract: Passages are formed in a valve disc to enable the disc to rotate to active positions on either side of a neutral position upon being moved through a relatively small angle of 30 degrees. The passages are of a simplified nature by virtue of the valve disc being formed with a multi-branch pressure passage in which one branch is positively blocked off when pressure fluid is being supplied through the other branch. The valve disc is adapted to be turned between its positions by an elongated handle which is biased to its neutral position and is positively stopped in its active positions.

Abstract: To enable a tool with a hydraulic actuator to be connected directly and quickly to a four-way, three-position control valve, the bodies of the tool and the valve are formed with sockets which receive fittings for establishing fluid communication between the tool and the valve. The fittings are anchored in the sockets of one of the bodies and are adapted to be telescoped slidably into the sockets in the other body to enable the bodies to be quickly and easily connected to and disconnected from one another. The arrangement is such that the same four-way, three-position control valve may be connected either to a tool having a double-acting hydraulic actuator or to a tool having a single-acting hydraulic actuator.