Excavator Pump Parts Bearing Shell Kayaba PSVL-54 Excavator Parts Bearing shells are core components of plain bearings. They operate by forming an oil film with lubricating oil, and are widely used on engine crankshafts, connecting rods and hydraulic pump rotating shafts. Support the rotating shaft Bear the crankshaft and connecting rod journals, withstand huge impact loads generated by engine combustion, and enable stable rotation of the shaft. Reduce friction, resist wear