160C LC - EXCAVATOR 3361 HYDRAULIC PUMP Parts group 3361 HYDRAULIC PUMP 3361 HYDRAULIC PUMP . MAIN HYDRAULIC PUMP MOUNTING AND COUPLER MAIN HYDRAULIC PUMP COMPONENTS Main Hydraulic Pump Output Controller Components Hydraulic Pump Flow Regulator Components HYDRAULIC PUMP PISTON ASSEMBLY (INSTALLED ON REAR OF MACHINE) HYDRAULIC PUMP PISTON ASSEMBLY (INSTALLED ON FRONT OF MACHINE)