OK request send EXCAVATORS PC550LC-8 S/N 70458-UP HYDRAULIC SYSTEM PROPORTIONAL PRESSURE CONTROL (PPC) VALVE PIPING Section PROPORTIONAL PRESSURE CONTROL (PPC) VALVE PIPING PC550LC-8 S/N 70458-UP Komatsu: PROPORTIONAL PRESSURE CONTROL (PPC) VALVE PIPING (#70458-) h023001 Truck sale: