20 and auxiliary valve delivery port 22 may receive fluid supplied by the pump 16 to various internal passages in the housing 12 based on the position of the priority valve spool 24 motor valve signal orifice 26 is provided and will allow access for a signal on the motor valve to affect the position of the priority valve spool 24 draft control delivery port 30 allows fluid access through the priority valve assembly and specifically through the variable orifice 32 to the draft control valve a high pressure relief valve 34 is provided in the assembly to relieve excessive pressure to passage 36 which is in communication with a reservoir which is not shown the priority valve spool 24 is urged by a spring 40 to the position shown in fig1 at times when the variable displacement pump is not operating or when the motor valve requires fluid the rotary metering valve 42 is a multi diametered rod with a threaded end 44 to which actuating arms 46 and 50 are attached the rotary metering valve 42 is provided with an elongated flat 48 machined into its surface the flat is rotatable across the variable orifice 32 such that the edge of the flat will dictate the orifice area as the rotary metering.