The specific displacement value for the 21W-60-22111 and 705-40-01370 hydraulic piston pumps is not directly indicated by the part numbers. Given that the Komatsu PC75UU-2 is a small to medium-sized excavator, the displacement is likely to be in the range of 40 - 70 cubic centimeters per revolution (cm³/rev). However, the exact displacement should be obtained from Komatsu's official product documentation.
Operating Pressure
Rated Pressure: The rated pressure of this pump is typically around 200 - 250 bar (20 - 25 MPa). This pressure rating is designed to effectively drive the various hydraulic actuators in the PC75UU-2 excavator, ensuring smooth operation of functions such as arm movement, bucket operation, and slewing.
Maximum Pressure: The maximum pressure that the pump can withstand for short periods is usually higher than the rated pressure, often reaching up to 300 bar (30 MPa) or more. This additional pressure capacity allows the pump to handle sudden high-load situations that may occur during the excavator's operation, such as when working in tough soil or rocky terrain.
