Bulldozer Komatsu D375A-6 and D375A-6R Main Control Valve Assemblies Part Numbers: 723-66-21400, 723-66-21600, 723-65-21400 Procurement Recommendations Verify OEM part number compatibility for D375A-3 models with complete blade and ripper spool sections Ensure all valves (new or remanufactured) include hydraulic bench test reports covering pressure, flow, and internal leakage for each section For remanufactured valves, confirm spools are either new or professionally honed and