708-2G-00320 708-2G-00620 Hydraulic Main Piston Pump Assembly For Komatsu PC200-10 PC210-10 PC210LC-10MO

Part numbers 708-2G-00320 and 708-2G-00620 are hydraulic main piston pump assemblies designed for Komatsu PC200-10, PC210-10, and PC210LC-10 excavators.

• Insufficient swing torque and weak swing performance
• Unstable swing speed with jerky motion and heavy shock during start/stop
• Abnormal noise from swing motor with housing vibration
• Oil leakage on motor housing from damaged seals and gaskets
• Wear of internal valve plate and plunger with excessive operating temperature
• Loss of swing holding pressure causing upper structure drift after shutdown

• Verify part numbers and machine serial number for compatibility
• Prioritize OEM parts or high-quality remanufactured components
• Inspect motor housing for cracks and check port thread integrity
• Confirm assembly includes complete seal kit for installation
• Request warranty documentation and factory inspection reports
• Check hydraulic oil condition and clean hydraulic circuit during replacement