below spool 46 and connected by common drain passage 30 and open center passage 56 the boom and bucket control valves 11 and 13 are conventional valves normally used in a more basic system which does not self level in such a system the boom and bucket valves 11 and 13 would be connected only to their respective cylinders 12 and 14 with boom and bucket spools 28 and 46 in their neutral positions as indicated in the drawing and the third function valve not shown also neutrally positioned there is no pressure build up in inlet cavity 24 since the pump flow freely passes through open center passages 38 54 and 56 back to reservoir 62 if it is the intent of the operator to raise the boom 15 while maintaining the bucket 16 in a level position boom valve spool 28 is moved to the right to the raise position as indicated at the left end of the spool 28 in the raise position spool land 70 blocks flow through open center passage 38 causing pressure to build in inlet cavity 24 while the left edge of land 70 opens power passage 36 to motor port 34 via passage 98 allowing pump pressure to enter the cap end of boom cylinder 12 as the boom 15 begins to raise the discharge flow from the rod end of cylinder 12 enters inlet cavity 84 of the flow divider valve 20 from cavity 84 fluid enters the center of shuttle spool 85 through lateral openings 86 and exits in a split path through the two fixed orifaces.