Excavator PC3000 / PC4000 Hydraulic Swing Motor Part Number 95930840 / 89659040
Common Faults
- Insufficient swing torque, weak swing and difficult start-up of large excavator
- Unstable swing speed, jerky swing motion and heavy shock during start & stop
- Abnormal noise of swing motor with housing vibration
- Oil leakage on motor housing, damaged oil seals and gaskets
- Wear of internal valve plate and plunger, excessive operating temperature
- Loss of swing holding pressure, upper structure slewing drift after shutdown
Purchasing Recommendations
- Verify part numbers and machine serial number to confirm compatibility with Komatsu PC3000-6 excavator
- Prioritize OEM parts or high-quality remanufactured parts; be cautious of low-cost generic spare parts
- Inspect motor housing for cracks, check integrity of port threads and output shaft before acceptance
- Confirm the swing motor assembly comes with a complete seal kit for easy installation and replacement
- Request warranty from supplier and retain factory inspection report
- Check hydraulic oil condition and clean hydraulic circuit to eliminate system contamination during assembly replacement
Product Images
Swing Motor Assembly - Front View
Swing Motor Assembly - Side View