Swing Motor Reducer Assembly for Komatsu PC2000-8 Excavator 21T-26-00300 21T-26-00400 706-7K-01180

Verify OEM part numbers and confirm assembly compatibility with models, including swing motor, reducer, and parking brake components.

• Request bench test reports for pressure, rotating torque, and internal leakage for both new and remanufactured units
• For remanufactured assemblies, verify replacement of pistons, valve plates, planetary gears, bearings, and oil seals

• Inspect housing for cracks and check oil seal integrity upon arrival
• Protect ports during handling to prevent contamination
• Secure assembly during transportation to prevent impact damage to shafts and gear components

• Clean connecting pipelines before installation, replace hydraulic filters, and properly bleed air from system
• Test swing speed, swing torque, parking brake function, and check for oil leakage after installation