Komatsu 723-40-70100 Self Reducing Valve Block Assembly

The 723-40-70100 self-pressure reducing valve block assembly is a critical hydraulic component designed for Komatsu PC200-6 series hydraulic excavators equipped with 6D102 diesel engines. This valve block integrates a main valve body with pressure reducing and overflow subassemblies to regulate pilot circuit pressure and maintain stable hydraulic system operation. The assembly weighs approximately 14.7 kg and is constructed from high-strength steel for durability in demanding construction environments. It serves as a direct replacement for Komatsu OEM part numbers 723-40-70100, 723-40-71900, 702-21-55100, and 702-21-09147. Compatible models include PC200-6, PC210-6K, PC220-6, PC240-6K, PC200-7, PC210-7K, PC220-7, PC130-7, PC128US-2, and PC138US-2 excavators. Cross-referenced with aftermarket part number 6014232.