Swing Motor Reducer Assembly for Komatsu PC2000-8 Excavator 21T-26-00300 21T-26-00400 706-7K-01180 Product Verification & Compatibility Verify OEM part numbers and confirm assembly compatibility with models, including swing motor, reducer, and parking brake components. Quality Assurance Requirements Request bench test reports for pressure, rotating torque, and internal leakage for both new and remanufactured units For remanufactured assemblies, verify replacement of pistons,