STRUCTURE AND FUNCTION HYDRAULIC PUMP HYDRAULIC PUMP a. Port PS (suction) b. Port PA (delivery) c. Port PLS (load pressure input port) d. Port PEPC (EPC basis pressure port) e. Breather mounting port f. Port Pd3 (Air bleeder plug) g. Port Pd1 (case drain) h. Port im (PC mode selector current) j. Port isig (LS set selector current) 1. Main pump 2. LS valve 3. PC valve 4. Fixed throttle valve 5. PC-EPC valve (for PC mode selector) 6. LS-EPC valve (for LS set selector) 10-36