and a hollow barrel portion 136 the barrel portion has a plurality of ports and grooves communicating with the sleeve openings and with spool windows and grooves as will be described infra a shoulder 138 of the head portion is designed to abut a bottom surface 140 of the sleeve a pair of piston supply ports 142 communicate with the supply openings 108 of the sleeve 96 a pair of eec ports 144 communicate with the eec openings 110 of the sleeve a manual port 146 communicates with the manual opening 112 a shutdown port 148 communicates with the shutdown opening 114 an overspeed land 150 directs drain pressure from the shutdown groove 152 which communicates drain pressure from the top of the chamber 104 to the drain opening 118 or ports supply pressure from the supply pressure port 154 to the supply opening 116 a shutdown drain port 156 communicates with the shutdown groove 152 as will be discussed infra a groove 158 and a port 160 are provided to equalize pressure about the piston to prevent the piston from torquing a transfer groove 162 communicates with the transfer opening 120 either drain pressure or supply pressure is provided to the transfer groove via output ports 164 and 166 a port 168 is provided to provide equal pressure across the piston balancing the supply pressure in output port 164 and supply pressure port 154 across the piston slot 170 which mates with the pin 128 allows the piston to translate within the sleeve without rotating relative thereto the.