Closed loop function selector valve

A closed loop function selector valve which directs hydraulic fluid pressure to any one of several hydraulic related devices wherein the low pressure drains or returns of all of the devices are directed back through the valve, comprising

• (a) a hollow valve body having a t least two function selector ports therein hydraulically connected to any of the devices, a high pressure line input port and a valve drain output port;
• (b) a selector moveably seated within the valve body having a line pressurized chamber within the valve body which is in constant flow communication with the hydraulic pressure directed into the valve by way of the line input port;
• (c) a chamber exit port within the selector arranged to be alignable with one of the function selector ports for flow communication therewith while the other function selector port is in flow communication with the valve rain output port within the valve body;
• and
• (d) detent means on the selector diametrically opposing the chamber exit port and within said valve body for releasably interlocking the selector into any one of its operational positions wherein the chamber exit port is in communication with one of the two function selector ports.